taif saad al maadhede, mohammad hafizuddin jumali, hadi j. al-agealy, chi chin yap, y. al-douri.  (2023).  improved performance of d149 dye-sensitized zno-based solar cell under solvents activation effect.  - the european physical journal plus.  1-8. 

mohamed nafeer wajidh, chi chin yap, nour attallah issa, kam sheng lau, sin tee tan, mohammad hafizuddin hj jumali, muslizainun mustapha, chin hua chia.  (2023).  photovoltaic performance improvement of inverted type organic solar cell by co-introducing isopropanol and carbon quantum dots in photoactive layer.  - journal of materials science: materials in electronics.  1-9. 

kai jeat hong, nur farah hanun wira, nur elmira melissa binti hilmi rizal, nour attallah issa, kam sheng lau, chi chin yap, sin tee tan, josephine ying chyi liew, chin hua chia, kok-keong chong.  (2023).  structural modification and conductivity enhancement of nicl2 incorporated p3ht: pc60bm based organic photoactive layer.  - optical materials.  1-8. 

chia chin hua;sarani bt. zakaria;yap chi chin;chin siew xian.  (2023).  three-dimensional hierarchical and multifunctional porous nanocomposite frameworks for advanced applications.  - .  . 

yap chi chin;mohammad hafizuddin bin jumali;rozidawati binti awang.  (2023).  role of cadmium selenide-coated carbon quantum dots in photoactive layer of indoor organic photovoltaics.  - .  . 

fatin saiha binti omar;yap chi chin.  (2023).  metal chalcogenide as binder-free faradaic electrode material for flexible supercapattery application.  - .  . 

nour attallah issa, chi chin yap, sin tee tan, kai jeat hong, kam sheng lau, farah liyana khairulaman, chin hua chia, mohammad hafizuddin hj jumali, kok-keong chong.  (2022).  photovoltaic performance improvement of organic solar cell with zno nanorod arrays as electron transport layer using carbon quantum dots-incorporated photoactive layer.  - optical materials.  1-8. 

chi chin yap, norhazirah dahalan, ain hafizatul abi talib, nur izzati mohamed rosli.  (2022).  kesan ketebalan lapisan pengangkut elektron tio2 terhadap prestasi sel suria organik: kajian simulasi.  - jurnal teknologi.  51-58. 

farah liyana khairulaman, chi chin yap, mohammad hafizuddin hj jumali & nour atallah issa.  (2022).  pengoptimuman lapisan p3ht:pcbm terdop cui dalam sel suria organik jenis songsang untuk aplikasi cahaya dalam.  - sains malaysiana.  4059-4069. 

nurul nadhirah binti md ridzuan, chi chin yap.  (2022).  kesan suhu rendaman dan suhu sepuh lindap dalam penyediaan filem nipis bismut sulfida (bi2s3) terhadap prestasi sel suria organik jenis songsang berasaskan p3ht: pcbm.  - sains malaysiana.  4099-4110. 

eng liang lim, chi chin yap, mohd asri mat teridi.  (2022).  third generation solar cells: materials, methods and future perspectives.  - .  31. 

sin tee tan, fang sheng lim, weng jon lee. hock beng lee, kai jeat hong, hind fadhil oleiwi, wei sea chang, chi chin yap, mohammad hafizuddin hj jumali.  (2021).  rational design of ordered bi/zno nanorod arrays: surface modification, optical energy band alteration and switchable wettability study.  - journal of materials research and technology.  5213-5220. 

taif saad al maadhde, mohammad hafizuddin jumali, hadi j.m.al-agealy, fatimah abdul razak, chi chin yap.  (2021).  an investigation of the fill factor and efficiency of molecular semiconductor solar cells.  - 3rd international scientific conference of alkafeel university, iscku 2021.  373-381. 

sameer al-bati, mohammad hafizuddin hj jumali, khatatbeh ibtehaj, bandar ali al-asbahi, chi chin yap.  (2021).  förster energy transfer mechanism and color tunability in three binary conjugated polymer blends.  - optical materials.  1-9. 

farah liyana khairulaman, chi chin yap, mohammad hafizuddin hj jumali.  (2021).  improved performance of inverted type organic solar cell using copper iodide-doped p3ht:pcbm as active layer for low light application.  - materials letters.  1-4. 

aina shasha hashimi, riski titian ginting, siew xian chin, kam sheng lau, muhammad amirul nazhif mohd nohan, sarani zakaria, chi chin yap, chin hua chia.  (2020).  fast microwave-assisted synthesis of copper nanowires as reusable high-performance transparent conductive electrode.  - current applied physics.  205-211. 

hasiah salleh, nora'aini ali, chi chin yap, azhar mohd sinin, nurhayati ishak, nurul huda kamarulzaman, salmah mohd ghazali, nik aziz nik ali.  (2020).  determination of homo and lumo level of polythiophene, poly(3-thiophene acetic acid), polypyrrole and chlorophyll via cyclic voltammetry method.  - 30th regional conference of solid state science and technology (solid state phenomena).  207-216. 

sameer al-bati, mohammad hafizuddin hj. jumali, bandar ali al-asbahi, khatatbeh ibtehaj, chi chin yap, saif m. h. qaid, hamid m. ghaithan, w. a. farooq..  (2020).  improving photophysical properties of white emitting ternary conjugated polymer blend thin film via additions of tio2 nanoparticles.  - polymers.  1-13. 

farah liyana khairulaman, chi chin yap.  (2020).  solid state phenomena.  - .  153-159. 

eng liang lim, chi chin yap, mohammad hafizuddin hj jumali, farah liyana khairulaman.  (2019).  solution-dispersed copper iodide anode buffer layer gives p3ht:pcbm-based organic solar cells an efficiency boost.  - journal of materials science: materials in electronics.  . 

mohd fairuz soh, mohamad firdaus mohamad noh, nurul aida mohamed, javad safaei, nurul nazli rosli, eng liang lim, chi chin yap, mohd asri mat teridi.  (2019).  incorporation of g-c3n4/ag dopant in tio2 as electron transport layer for organic solar cells.  - materials letters.  117-120. 

araa mebdir holi, zulkarnain zainal, asmaa kadim ayal, sook-keng chang, hong ngee lim, zainal abidin talib, chi-chin yap.  (2019).  ag2s/zno nanorods composite photoelectrode prepared by hydrothermal method: influence of growth temperature.  - optik.  473-479. 

kai jeat hong, sin tee tan, kok-keong chong, chi chin yap, mohammad hafizuddin hj jumali, yueh-lin loo.  (2019).  numerical analysis with experimental verification to predict outdoor power conversion efficiency of inverted organic solar devices.  - renewable energy.  . 

kai jeat hong, kok-keong chong, sin tee tan, chi chin yap.  (2019).  analytical methodology with experimental verification to predict outdoor power conversion efficiency.  - proceedings of 11th international conference on applied energy, part 4.  1-5. 

yap chi chin.  (2019).  aplikasi nanostruktur bismut sulfida sebagai lapisan pengangkut elektron dalam sel suria polimer songsang berasaskan p3ht:pcbm.  - .  1-4. 

ethar yahya salih, mohd faizul mohd sabri, sin tee tan, khaulah sulaiman, mohd zobir hussein, suhana mohd said, chi chin yap.  (2019).  preparation and characterization of zno/znal2o4-mixed metal oxides for dye-sensitized photodetector using zn/al-layered double hydroxide as precursor.  - journal of nanoparticle research.  1-12. 

kam sheng lau, siew xian chin, sin tee tan, fang sheng lim, wei sea chang, chi chin yap, mohammad hafizuddin hj jumali, sarani zakaria, soon wei chook, chin hua chia.  (2019).  silver nanowires as flexible transparent electrode: role of pvp chain length.  - journal of alloys and compounds.  165-171. 

norngainy mohd tawil, yap chi chin, akmal sabarudin & murshida marizan.  (2018).  finance 2-obs 2018.  - video manual finance 2- obs 2018.  . 

akmal sabarudin, murshida marizan nor, yap chi chin.  (2018).  principles of entrepreneurship and innovation.  - .  34. 

norngainy mohd tawil, murshida marizan nor, akmal sabarudin &. yap chi chin.  (2018).  video manual.  - operation-8 plant obs 2018.  . 

poh choon ooi m.f.mohd. razip wee chang fu dee chi chin yap muhammad mat salleh burhanuddin yeop majlis.  (2018).  fabrication of transparent bistable switching memory device using plasmapolymerized hexamethyldisiloxane layers with embedded graphene quantum dots.  - thin solid films.  45-50. 

yap chi chin;muhamad bin mat salleh;mohammad hafizuddin bin jumali;rozidawati binti awang.  (2018).  aplikasi nanostruktur bismut sulfida dengan pelbagai morfologi sebagai lapisan penerima elektron dalam sel suria organik jenis songsang.  - .  . 

norngainy mohd tawil, murshida marizan nor, akmal sabarudin & yap chi chin.  (2018).  video manual sistem obs.  - video manual marketing 2-obs 2018.  . 

hind fadhil oleiwi, azmi zakaria, chi chin yap, sin tee tan, hock beng lee, chun hui tan, riski titian ginting, abdelelah alshanableh, zainal abidin talib.  (2018).  surface modification of zno nanorods with cds quantum dots for application in inverted organic solar cells: effect of deposition duration.  - journal of materials science: materials in electronics.  2601-2609. 

norngainy mohd tawil, murshida marizan nor, akmal sabarudin & yap chi chin.  (2018).  video manual finance 1-2018.  - finance 1-2018.  . 

abdelelah alshanableh, sin tee tan, chi chin yap, hock beng lee, hind fadhil oleiwi, kai jeat hong, mohd. hafizuddin hj.jumali, muhammad yahaya.  (2018).  surface engineering of zno nanorod for inverted organic solar cell.  - materials science & engineering b.  . 

eng liang lim, chi chin yap, mohammad hafizuddin hj jumali, mohd asri mat teridi, chin hoong teh.  (2018).  a mini review: can graphene be a novel material for perovskite solar cell applications?.  - nano-micro letters.  1-12. 

masliana muslimin, mohammad hafizuddin jumali, tan sin tee, lee hock beng, tan chun hui & yap chi chin.  (2018).  influence of zr doping on structure and morphology of tio2 nanorods prepared using hydrothermal method.  - the 2017 ukm fst postgraduate colloquium, aip conference proceedings.  . 

mohamad firdaus mohamad noh, chin hoong teh, rusli daik, eng liang lim, chi chin yap, mohd adib ibrahim, norasikin ahmad ludin, abd. rashid bin mohd yusoff, jin jang and mohd asri mat teridi.  (2018).  the architecture of the electron transport layer for a perovskite solar cell.  - journal of materials chemistry c.  682-712. 

faiz najihah sharum, nurul nabila ismail, eng liang lim, yap chi chin.  (2018).  kesan kepekatan larutan bi2s3 terhadap prestasi sel suria organik jenis songsang.  - undergraduate research journal for applied physics and novel materials.  . 

nasehah syamin sabri, chi chin yap, muhammad yahaya, muhamad mat salleh and mohammad hafizuddin haji jumali.  (2018).  effect of mixed metal oxides anode modification on the performance of inverted type hybrid organic solar cell based on zno/p3ht.  - solid state science and technology.  . 

kai jeat hong, sin tee tan, kok-keong chong, hock beng lee, riski titian ginting, fang sheng lim, chi chin yap, chun hui tan, wei sea chang, mohammad hafizuddin hj jumali.  (2018).  synergy study on charge transport dynamics in hybrid organic solar cell: photocurrent mapping and performance analysis under local spectrum.  - current applied physics.  . 

araa mebdir holia, zulkarnain zainalb,c,*, asmaa kadim ayald, sook-keng changb,c, hong ngee limb,c, zainal abidin talibe, chi-chin yapf.  (2018).  effect of heat treatment on photoelectrochemical performance of hydrothermally synthesised ag2s/zno nanorods arrays.  - chemical physics letters.  . 

roslan abd shukor, wan mohd aimran wan mohd kamil, wee choi chiang, chin mai ying, yap chi chin, muhammad ashraf azman, zalita zainuddin, rozidawati awang, nurul shazana abdul hamid & mohd amir radhi othman.  (2018).  program olimpiad fizik antarabangsa (international physics olympiad) di ukm.  - rampai penyelidik siri 6 stem untuk komuniti.  . 

marjoni imamora ali umar, chi chin yap, rozidawati awang, muhamad mat salleh.  (2017).  effect of thermal reduction temperature on the optical and electrical properties of multilayer graphene.  - journal of materials science: materials in electronics.  1038-1041. 

nasehah syamin sabri, chi chin yap, muhammad yahaya, muhamad mat salleh, mohammad hafizuddin hj jumali.  (2017).  solution-dispersed cuo nanoparticles as anode buffer layer in inverted type hybrid organic solar cells.  - physica status solidi a.  1-7. 

eng liang lim, chi chin yap, mohammad hafizuddin hj jumali, mohd asri mat teridi, chin hoong teh.  (2017).  inverted organic solar cells integrated with room temperature solution-processed bismuth sulfide electron selective layer.  - solar energy.  1108-1113. 

mohamad firdaus mohamad noh, mohd fairuz soh, chin hoong teh, eng liang lim, chi chin yap,mohd adib ibrahim, norasikin ahmad ludin, mohd asri mat teridi.  (2017).  effect of temperature on the properties of sno2 layer fabricated via aacvd and its application in photoelectrochemical cells and organic photovoltaic devices.  - solar energy.  474-482. 

akmal sabarudin, murshida marizan nor, yap chi chin.  (2017).  principles of entrepreneurship and innovation.  - .  386. 

araa mebdir holi, zulkarnain zainal, zainal abidin talib, hong-ngee lim, chi-chin yap, sook-keng chang, asmaa kadim ayal.  (2017).  enhanced photoelectrochemical performance of zno nanorod arrays decorated with cds shell and ag2s quantum dots.  - superlattices and microstructures.  295-303. 

farah liyana khairulaman, eng liang lim, chi chin yap.  (2017).  siri penyelidikan fizik gunaan 2017.  - .  4. 

mohammad hafizuddin hj jumali, zalita zainuddin & chi chin yap.  (2017).  preface: the 1st ukm-isesco-comsats international workshop on nanotechnology for young scientists.  - the 1st ukm-isesco-comsats international workshop on nanotechnology for young scientists (iwys2016).  . 

hind fadhil oleiwi, azmi zakaria, chi chin yap, haidr abdulzahra abbas, sin tee tan, hock beng lee, chun hui tan, riski titian ginting, abdelelah alshanableh, and zainal abidin talib.  (2017).  enhanced photovoltaic performance of cds-sensitized inverted organic solar cells prepared via a successive ionic layer adsorption and reaction method.  - the 1st ukm-isesco-comsats international workshop on nanotechnology for young scientists (iwys2016), aip conference proceedings.  20007. 

nasehah syamin sabri, eng liang lim, chi chin yap, muhammad yahaya, muhamad mat salleh & mohammad hafizuddin haji jumali.  (2017).  effect of multiple deposition of nio layer on the performance of inverted type organic solar cell based on zno/p3ht:pcbm.  - the 1st ukm-isesco-comsats international workshop on nanotechnology for young scientists (iwys2016), aip conference proceedings.  20015. 

chun hui tan, sin tee tan, hock beng lee, riski titian ginting, hind fadhil oleiwi, chi chin yap, mohammad hafizuddin haji jumali, muhammad yahaya.  (2017).  automated room temperature optical absorbance co sensor based on in-doped zno nanorod.  - sensors and actuators b: chemical.  140-152. 

araa mebdir holi, zulkarnain zainal, zainal abidin talib, hong-ngee lim, chi-chin yap, sook-keng chang, asmaa kadim ayal.  (2016).  hydrothermal deposition of cds on vertically aligned zno nanorods for photoelectrochemical solar cell application.  - journal of materials science: materials in electronics.  7353-7360. 

norngainy mohd tawil,shamshubaridah,yap chi chin,murshida marizan,akmal sabaruddin,azmi omar,zainebbevi.  (2016).  the development of online business simulation (obs).  - projek pelan strategi pem.  . 

hock beng lee, riski titian ginting, sin tee tan, chun hui tan, abdelelah alshanableh, hind fadhil oleiwi, chi chin yap, mohd hafizuddin hj. jumali & muhammad yahaya.  (2016).  controlled defects of fluorine-incorporated zno nanorods for photovoltaic enhancement.  - scientific reports.  1-11. 

nasehah syamin sabri, chi chin yap, muhammad yahaya, mohammad hafizuddin haji jumali, muhamad mat salleh.  (2016).  optimizing the performance of inverted type hybrid organic solar cell based on zno/p3ht with various polymer deposition parameters.  - journal of materials science: materials in electronics.  10442-10448. 

araa mebdir holi, zulkarnain zainal, zainal abidin talib, hong-ngee lim, chi-chin yap, sook-keng chang, asmaa kadim ayal..  (2016).  effect of hydrothermal growth time on zno nanorod arrays photoelectrode performance.  - optik.  11111-11118. 

nasehah syamin sabri, chi chin yap, muhammad yahaya, muhamad mat salleh, mohammad hafizuddin haji jumali.  (2016).  effects of ch3nh3pbi(3-x)clx perovskite layer on the performance of inverted type hybrid organic solar cells based on zno/p3ht.  - materials science forum.  292-297. 

nasehah syamin sabri, chi chin yap, muhammad yahaya, muhamad mat salleh and mohammad hafizuddin haji jumali.  (2016).  solution-dispersed cuo nanoparticles anode buffer layer: effect of ultrasonic agitation duration on photovoltaic performance.  - the 2016 ukm fst postgraduate colloquium,aip conference proceedings.  1-6. 

chun hui tan, sin tee tan, hock beng lee, chi chin yap and muhammad yahaya.  (2016).  growth concentration effect on oxygen vacancy induced band gap narrowing and optical co gas sensing properties of zno nanorod.  - the 2016 ukm fst postgraduate colloquium, aip conference proceedings.  1-5. 

abdelelah alshanableh, chi chin yap, sin tee tan, hock beng lee, chun hui tan, riski titian ginting, mohd. hafizuddin hj. jumali.  (2016).  novel hydrothermal approach to functionalize self-oriented twin zno nanotube arrays.  - materials letters.  75-78. 

sin tee tan, chun hui tan, wu yi chong, chi chin yap, akrajas ali umar, riski titian ginting, hock beng lee, kok sing lim, muhammad yahaya, muhamad mat salleh.  (2016).  microwave-assisted hydrolysis preparation of highly crystalline zno nanorod array for room temperature photoluminescence-based co gas sensor.  - sensors and actuators b: chemical.  304-312. 

hock beng lee, sin tee tan, riski titian ginting, chun hui tan, hind fadhil oleiwi, chi chin yap and mohd. hafizuddin haji jumali.  (2016).  tailoring the photovoltaic performance of inverted hybrid solar cells by replacing pedot:pss with v2ox as hole-extraction layer.  - the 2016 ukm fst postgraduate colloquium, aip conference proceedings.  1-5. 

akmal sabarudin; murshida marizan nor; yap chi chin.  (2016).  principles of entrepreneurship and innovation.  - .  335-369. 

riski titian ginting, hock beng lee, sin tee tan, chun hui tan, mohd. hafizuddin hj. jumali, chi chin yap, jae-wook kang, and muhammad yahaya.  (2016).  a simple approach low-temperature solution process for preparation of bismuth-doped zno nanorods and its application in hybrid solar cells.  - journal of physical chemistry c.  771-780. 

n.m.tawil, s. ramlee, y. c. chin, m. marezan, a. sabarudin, z. kamalbatcha.  (2016).  refining entrepreneurship education with online business simulation as gamification style.  - the international conference on communications, computer science and information technology 2016.  . 

eng liang lim, chi chin yap, mohd asri mat teridi, chin hoong teh, abd rashid bin mohd yusoff, mohammad hafizuddin hj jumali.  (2016).  a review of recent plasmonic nanoparticles incorporated p3ht: pcbm organic thin film solar cells.  - organic electronics.  12-28. 

chin hoong teh, rusli daik, eng liang lim, chi chin yap, mohd adib ibrahim, norasikin ahmad ludin, kamaruzzaman sopian, mohd asri mat teridi.  (2016).  a review of organic small molecule-based hole transporting materials for meso-structured organic-inorganic perovskite solar cells.  - journal of materials chemistry a.  15788-15822. 

hind fadhil oleiwi, sin tee tan, hock beng lee, chi chin yap, riski titian ginting, azmi zakaria, abdelelah alshanableh, chun hui tan, mohammad hafizuddin hj jumali, muhammad yahaya & z. a. talib.  (2016).  two-dimensional cds intercalated zno nanorods: a concise study on interfacial band structure modification.  - rsc advances.  52395-52402. 

eng liang lim, chi chin yap, muhammad yahaya, muhamad mat salleh, mohammad hafizuddin haji jumali.  (2015).  zno nanorod arrays pre-coated with dcjtb dye for inverted type hybrid solar cells incorporating p3ht donor.  - journal of materials science: materials in electronics.  719-725. 

hock beng lee, mohd. hafizuddin hj jumali, riski titian ginting, sin tee tan, chi chin yap, chun hui tan.  (2015).  mechanistic study on highly crystalline (002) plane bounded zno nanofilms prepared via direct current magnetron sputtering.  - materials letters.  83-88. 

karwan wasman qadira, zubair ahmad, khaulah sulaiman, chi chin yap, farid touati.  (2015).  binary blend based dye sensitized photo sensor using pcpdtbt and meh-ppv composite as a light sensitizer.  - synthetic metals.  392-397. 

akmal sabarudin, murshida marizan nor & yap chi chin.  (2015).  principles of entrepreneurship and innovation.  - .  12:327-349. 

s. soltaninejad, r. daik, m. deraman, y.c. chin, n.s.m. nor, n.e.s. sazali, e. hamdan, m.r.m. jasni, m.m. ishak, m. noroozi, m. suleman.  (2015).  physical and electrochemical characteristics of carbon monoliths electrodes from activation of pre-carbonized fibers of oil palm empty fruit bunches added with varying amount of polypyrrole of polypyr.  - international journal of electrochemical science.  10524 - 10542. 

marjoni imamora ali umara, chi chin yap, rozidawati awang, muhamad mat salleh, muhammad yahaya.  (2014).  the effect of spin-coated polyethylene glycol on the electrical and optical properties of graphene film.  - applied surface science.  883-887. 

riski titian ginting, chi chin yap, muhammad yahaya, and muhammad mat salleh.  (2014).  solution-processed ga-doped zno nanorod arrays as electron acceptors in organic solar cells.  - acs applied materials & interfaces.  5308-5318. 

yap chi chin, muhammad bin yahaya, mohammad hafizuddin bin jumali, muhamad bin mat salleh, rozidawati binti awang, akrajas ali umar.  (2014).  graphene thin film with enhanced electrical conductivity by chemical doping for organic solar cells.  - .  . 

riski titian ginting, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2014).  improvement of inverted type organic solar cells performance by incorporating mg dopant into hydrothermally grown zno nanorod arrays.  - journal of alloys and compounds.  585:696-702. 

sin tee tan, akrajas ali umar, aamna balouch, suratun nafisah, muhammad yahaya, chi chin yap, muhamad mat salleh, i. v. kityk and munetaka oyama.  (2014).  ag-zno nanoreactor grown on fto substrate exhibiting high heterogeneous photocatalytic efficiency.  - acs combinatorial sciences.  314-320. 

m. yahaya, sin tee tan, akrajas ali umar, c.c. yap, and m.m. salleh.  (2014).  synthesis of zno nanorod arrays by chemical solution and microwave method for sensor application.  - key engineering materials.  585-588. 

sin tee tan, akrajas ali umar, aamna balouch, muhammad yahaya, chi chin yap,muhamad mat salleh, munetaka oyama.  (2014).  zno nanocubes with (101) basal plane photocatalyst prepared via a low-frequency ultrasonic assisted hydrolysis process.  - ultrasonics sonochemistry.  21:754-760. 

e l lim, c c yap, m yahaya and m m salleh.  (2013).  performance enhancement of hybrid solar cells via surface modification with diluted p3ht.  - journal of physics : conference series.  Volume 431, Issue 1. 

r t ginting, c c yap, m yahaya, v fauzia and m m salleh.  (2013).  active layer spin coating speed dependence of inverted organic solar cell based on eosin-y-coated zno nanorod arrays.  - journal of physics: conference series.  431:012016. 

eng liang lim, chi chin yap, muhammad yahaya and muhamad mat salleh.  (2013).  enhancement of zno nanorod arrays-based inverted type hybrid organic solar cell using spin-coated eosin-y.  - semiconductor science and technology.  28(4):Art no.045009. 

riski titian ginting, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2013).  meh-ppv and pcbm solution concentration dependence of inverted-type organic solar cells based on eosin-y-coated zno nanorod arrays.  - international journal of photoenergy.  2013:Article ID 503715. 

marjoni imamora ali umar, chi chin yap, rozidawati awang, muhamad mat salleh and muhammad yahaya.  (2013).  effect of graphite oxide solution concentration on the properties of multilayer graphene.  - aip conference proceeding- the 2013 ukm fst postgraduate colloquium.  . 

nasehah syamin sabri, chi chin yap, muhammad yahaya and muhamad mat salleh.  (2013).  effect of simultaneous electrical and thermal treatment on the performance of bulk heterojunction organic solar cell blended with organic salt.  - aip conference proceeding- the 2013 ukm fst postgraduate colloquium.  . 

bandar ali al-asbahi, mohammad hafizuddin haji jumali, chi chin yap, muhamad mat salleh..  (2013).  influence of tio2 nanoparticles on enhancement of optoelectronic properties of pfo-based light emitting diode.  - journal of nanomaterials.  1-7. 

marjoni imamora ali umar, chi chin yap, rozidawati awang, mohammad hafizuddin hj jumali, muhamad mat salleh, muhammad yahaya.  (2013).  characterization of multilayer graphene prepared from short-time processed graphite oxide flake.  - journal of materials science: materials in electronics.  24(4):1282-1286. 

al-asbahi, b.a., jumali, m.h.h., yap, c.c., salleh, m.m., alsalhi, m.s..  (2013).  inhibition of dark quenching by tio2 nanoparticles content in novel pfo/fluorol 7ga hybrid: a new role to improve oled performance.  - chemical physics letters.  570:109-112. 

yuen-yee wong, yu-kong chen, jer-shen maa, hung-wei yu, yung-yi tu, chang-fu dee, chi-chin yap and edward yi chang.  (2013).  low resistance copper-based ohmic contact for algan/gan high electron mobility transistors.  - applied physics letters.  103(15):Art no.152104. 

sin tee tan, akrajas ali umar, muhamad yahaya, chi chin yap, muhamad mat salleh.  (2013).  ultrafast formation of zno nanorods via seed-mediated microwave assisted hydrolysis process.  - journal of physics: conference series 3rd isesco international workshop and conference on nanotechnology 2012 (iwcn2012).  . 

riski titian ginting, chi chin yap, muhammad yahaya and muhamad mat salleh.  (2013).  impedance spectroscopy characterization of inverted type organic solar cells based on poly(3-hexylthiophene-2,5-diyl).  - aip conference proceeding- the 2013 ukm fst postgraduate colloquium.  . 

n. b. ibrahim, r. abd-shukor, i. abdul rahman, z. ibarahim, c.c.yap.  (2013).  american institute of physics conference proceedings (2012 national physics conference proceedings).  - american institute of physics conference proceedings 2012 national physics conference proceedings.  . 

sin tee tan, akrajas ali umar, muhammad yahaya, muhamad mat salleh, chi chin yap, hong-quan nguyen, chang-fu dee, edward yi chang, and munetaka oyama.  (2013).  formation of a multi-arm branched nanorod of zno on the si surface via a nanoseed-induced polytypic crystal growth using the hydrothermal method.  - science of advanced materials.  5:803-809. 

nasehah syamin sabri, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2013).  influence of organic salt concentration on the performance of bulk heterojunction organic solar cell.  - journal of materials science: materials in electronics.  24(7):2183-2188. 

marjoni imamora ali umar, chi chin yap, rozidawati awang, akrajas ali umar, muhamad mat salleh, muhammad yahaya.  (2013).  formation of gold-coated multilayer graphene via thermal reduction.  - materials letters.  106:200-203. 

nasehah syamin sabri, chi chin yap, muhammad yahaya, and muhamad mat salleh.  (2013).  mehppv : pcbm-based bulk heterojunction organic solar cell blended with various organic salts.  - aip conference proceedings (2012 national physics conference).  . 

bandar ali al-asbahi, mohammad hafizuddin haji jumali, chi chin yap, muhamad mat salleh.  (2013).  enhancement of poly(9,9'-di-n-octylfluorenyl-2.7-diyl) optoelectronic properties in novel conjugated polymer/laser dye hybrid oleds.  - isesco conference on nanomaterials and applications 2012.  281-288. 

bandar ali al-asbahi, mohammad hafizuddin haji jumali, chi chin yap, moayad husein flaifel, muhamad mat salleh..  (2013).  photophysical properties and energy transfer mechanism of pfo/fluorol 7ga hybrid thin films.  - journal of luminescence.  57-65. 

riski titian ginting, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2013).  influence of poly(2-methoxy-5-(2`-ethyl)-hexyloxy-p-phenylene vinylene):(6,6)-phenyl c61 butyric acid methyl ester blend ratio on the performance of inverted type organic solar cells based on.........  - thin solid films.  536:286-290. 

riski titian ginting, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2012).  effect of eosin-y coating temperature on the performance of inverted bulk heterojunction organic solar cells.  - 26th regional conference on solid state science and technology, rcssst 2011;seremban, negeri sembilan (advanced materials research).  . 

dee, cf; yap, sl; yap, cc; wong, cs; majlis, by.  (2012).  study on the effect of ar ion beam bombardment on zno nanowires.  - 2nd asean-apctp workshop on advanced materials science and nanotechnology (amsn);malaysia.  . 

yahaya, m; yap, cc; salleh, mm.  (2012).  effect of dye coating duration on the performance of inverted type organic bulk heterojunction solar cell based on eosin-y coated zno nanorod arrays.  - 2nd international conference on mechanical and aerospace engineering, icmae 2011;bangkok.  . 

b. a. al-asbahi, m. h. haji jumali and c. c. yap.  (2012).  effect of tio2 contents on optical properties of poly(9,9`-di-n-octylfluorenyl-2.7-diyl)/tio2 nanocomposites thin films.  - solid state science and technology letters.  19(1&2):157-162. 

jumali, m.h.h., al-asbahi, b.a., yap, c.c., salleh, m.m., alsalhi, m.s..  (2012).  optoelectronic property enhancement of conjugated polymer in poly(9,9-di-n-octylfluorenyl-2.7-diyl)/titania nanocomposites.  - thin solid films.  524:257-262. 

eng liang lim, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2012).  zno nanorod arrays coated with eosin-y at different concentrations for inverted bulk heterojunction organic solar cells.  - 26th regional conference on solid state science and technology, rcssst 2011;seremban, negeri sembilan (advanced materials research).  . 

nasehah syamin, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2012).  effect of electric field treatment on the performance of organic salt doped solar cell.  - 26th regional conference on solid state science and technology, rcssst 2011;seremban, negeri sembilan (advanced materials research).  . 

c.c. yap, m. yahaya, and m.m. salleh.  (2011).  inverted bulk heterojunction organic solar cell with zno nanorod arrays.  - journal of solid state science and technology.  19(1):101-106. 

badariah bais, shamsul rahimi a. subki, chi chin yap, chang fu dee and burhanuddin yeop majlis,.  (2011).  process development on synthesizing zinc oxide nanorods and fabrication of idt finger electrodes for surface acoustic wave devices.  - 2011 ieee regional symposium on micro and nano electronics, rsm 2011; kota kinabalu, sabah.  . 

mohammad b. kassim, wan ramli wan daud, lorna jeffery minggu, kamaruzzaman sopian, mohd hafizuddin hj. jumali, akrajas ali umar, ibrahim n. hassan, siti fairus mohd yusoff, yap chi chin.  (2011).  progress in photoelectrochemical research 2011.  - .  99. 

c.c. yap, m. yahaya & m.m. salleh.  (2011).  effect of organic salt doping on the performance of single layer bulk heterojunction organic solar cell.  - solar energy.  85(1):95-99. 

mokhtar, msam; yap, cc; salleh, mm; umar, aa; yahaya, m.  (2011).  effect of organic salt doping ratios on the performance of poly(9,9-di-n-hexylfluorenyl-2,7-diyl) organic light emitting diode, oled.  - malaysia annual physics conference 2010, perfik-2010; damai laut(aip conference proceedings).  . 

mohd shahrul akram mokhtar, muhamad mat salleh, akrajas ali umar, chi chin yap, muhammad yahaya.  (2010).  effect of organic salt doping on the performance of poly(9,9-di-n-hexylfluorenyl-2,7-diyl) organic light emitting diode, oled.  - aip conference proceeding (the third nanoscience nanotechnology symposium 2010 : nnsb 2010).  . 

muhammad yahaya, chi chin yap, mohammad hafizuddin jumali, muhamad mat salleh.  (2010).  growth and synthesis of zno nanorod arrays by a chemical solution method.  - 4th asian physics symposium: an international symposium.  79-82. 

abdullah, h; ariyanto, np; yuliarto, b; junaidi, s; chin, yc; yahaya, m; shaari, s.  (2010).  fabrication and characterization of flower-like zinc oxide for dye-sensitized solar cell photoanode.  - 2nd wseas international conference on nanotechnology/5th wseas international conference on optics astrophysics-astronomy /1st wseas international conference plasma, fusion, nuclear physics, feb 20-22,.  . 

c.c. yap, m. yahaya, m.h. jumali and m.m. salleh.  (2009).  synthesis of zno nanorod arrays on zno nanoparticles-coated ito substrate.  - journal of solid state science and technology.  17(2): 8-15. 

c.c. yap, m. yahaya, m.m. salleh.  (2009).  the effect of driving voltage on the electroluminescent property of a blend of poly(9-vinylcarbazole) and 2-(4-biphenylyl)-5-phenyl-1,3,4-oxadiazole.  - current applied physics.  9(5):1038-1041. 

c.c. yap, m. yahaya, m.m. salleh.  (2009).  influence of tetrabutylammonium hexafluorophosphate (tbapf6) doping level on the performance of organic light emitting diodes based on pvk:pbd blend films.  - current applied physics.  9(4):722-726. 

yahaya, m., yap, c.c., salleh, m.m..  (2009).  energy conversion: nano solar cell.  - aip conference proceedings.  . 

c.c. yap, m. yahaya, m.m. salleh.  (2009).  the effect of dcjtb concentration on the photoluminescent and electroluminescent properties of pvk-pbd-perylene-dcjtb thin films.  - materials science-poland.  27(1):209-218. 

c.c. yap, m. yahaya, and m.m. salleh.  (2009).  inverted bulk heterojunction organic solar cell with zno nanorod arrays.  - 25th regional conference on solid state science and technology (rcssst 2009).  . 

yap chin chi, muhammad yahaya, muhamad mat salleh & dee chang fu.  (2008).  controlled-growth of zno nanowires with different processing temperatures.  - jurnal sains malaysiana.  37(3):277-280. 

yap chin chin, muhammad yahaya & muhamad mat salleh.  (2006).  fabrication white polymer light emitting diodes with ito/pvk:pbd:dpvbi:dcitb/al structure.  - proceedings 2006 ieee international conference on semiconductor electronics, nov. 29 dec 1, 2006 kuala lumpur, malaysia.  .