vidhya selvanathan, rosiyah yahy, hamad f. alharbi, nabeel h. alharthi, yahya s. alharthi, mohd hafidz ruslan, nowshad amin, md. akhtaruzzaman.  (2020).  organosoluble starch derivative as quasi-solid electrolytes in dssc: unravelling the synergy between electrolyte rheology and photovoltaic properties.  - solar energy.  144-153. 

ahmad fudholi, nur farhana mohd razali, mohammad h.yazdi, adnan ibrahim, mohd hafidz ruslan, mohd yusof othman, kamaruzzaman sopian.  (2019).  tio2/water-based photovoltaic thermal (pvt) collector: novel theoretical approach.  - energy.  305-314. 

nurul syakirah nazri, ahmad fudholi, wan mustafa, chan hoy yen, masita mohammad, mohd hafidz ruslan, kamaruzzaman sopian.  (2019).  exergy and improvement potential of hybrid photovoltaic thermal/thermoelectric (pvt/te) air collector.  - renewable and sustainable energy reviews.  132-144. 

a.a. razak, z.a.a. majid, f. basrawi, a.f. sharol, m.h. ruslan, k. sopian.  (2019).  a performance and technoeconomic study of different geometrical designs of compact single-pass cross-matrix solar air collector with square-tube absorbers.  - solar energy.  314-330. 

a.a. lahimer, k. sopian, a.a. razak, m.h. ruslan. a. alghoul.  (2019).  experimental investigation on the performance of solar chimney for reduction of vehicle cabin soak temperature.  - applied thermal engineering.  247-260. 

ahmad fudholi, muhammad zohri, goh li jin, adnan ibrahim, chan hoy yen, mohd yusof othman, mohd hafidz ruslan & kamaruzzaman sopian.  (2018).  energy and exergy analyses of photovoltaic thermal collector with v-groove.  - solar energy.  742-750. 

nurul syakirah nazri, ahmad fudholi, bardia bakhtyar, can hoy yen, adnan ibrahim, mohd hafidz ruslan, sohif mat, kamaruzzaman sopian.  (2018).  energy economic analysis of photovoltaic-thermal-thermoelectric (pvt-te) air collectors.  - renewable and sustainable energy reviews.  . 

ali h.a. al-waelia, k. sopian, hussein a. kazem, jabar h. yousif, miqdam t. chaichan, adnan ibrahim, sohif mat, mohd hafidz ruslan.  (2018).  comparison of prediction methods of pv/t nanofluid and nano-pcm system using a measured dataset and artificial neural network.  - solar energy.  378-396. 

ali h.a. al-waeli, k. sopian, miqdam t. chaichan, hussein a. kazem, adnan ibrahim, sohif mat, mohd hafidz ruslan.  (2017).  evaluation of the nanofluid and nano-pcm based photovoltaic thermal (pvt) system: an experimental study.  - energy conversion and management.  693-708. 

m.w. kareem, khairul habib, k. sopian, m.h. ruslan.  (2017).  multi-pass solar air heating collector system for drying of screw-pine leaf (pandanus tectorius).  - renewable energy.  413-424. 

ahed hameed jaaz, husam abdulrasool hasan, kamaruzzaman sopian, mohd hafidz bin haji ruslan, saleem hussain zaidi.  (2017).  design and development of compound parabolic concentrating for photovoltaic solar collector: review.  - renewable and sustainable energy reviews.  1108-1121. 

m.y. othman, s.a. hamid, m.a.s. tabook, k. sopian, m.h. ruslan & z. ibarahim.  (2016).  performance analysis of pv/t combi with water and air heating system: an experimental study.  - renewable energy.  716-722. 

ahmad fudholi, b. bakhtyar, habibis saleh, mohd hafidz ruslan, mohd yusof othman & kamaruzzaman sopian.  (2016).  drying of salted silver jewfish in a hybrid solar drying system and under open sun: modeling and performance analyses.  - international journal of green energy.  1135-1144. 

ali najah al-shamani , k. sopian , sohif mat , husam abdulrasool hasan , azher m. abed, m.h. ruslan.  (2016).  experimental studies of rectangular tube absorber photovoltaic thermal collector with various types of nanofluids under the tropical climate conditions.  - energy conversion and management.  528-542. 

towhid h. chowdhury, ashraful islam, a. k. mahmud hasan, m. asri mat terdi, m. arunakumari, surya prakash singh, md. khorshed alam, idriss m. bedja, mohd hafidz ruslan, kamaruzzaman sopian, nowshad am.  (2016).  prospects of graphene as a potential carrier-transport material in third-generation solar cells.  - the chemical record.  614-632. 

s. misha, s. mat, m.h. ruslan, e. salleh , k. sopian.  (2016).  performance of a solar assisted solid desiccant dryer for oil palm fronds drying.  - solar energy.  415-429. 

a.m.elbreki,m.a.alghoul,a.n.al-shamani,a.a.ammar,bita yegani, alsanossi m.aboghrara,m.h.rusaln,k.sopian.  (2016).  the role of climatic design operational parameters on combined pv/t collector performance a critical review.  - renewable and sustainable energy reviews.  602-647. 

a.a.razak, z.a.a.majid, w.h.azmi, m.h.ruslan, sh.choobchian, g.najafi, k. sopian.  (2016).  review on matrix thermal absorber designs for solar air collector.  - renewable and sustainable energy reviews.  682-693. 

willy tjiu, tjukup marnoto, sohif mat, mohd hafidz ruslan, kamaruzzaman sopian.  (2015).  darrieus vertical axis wind turbine for power generation i: assessment of darrieus vawt configurations.  - renewable energy.  50-67. 

m.k. anuar sharif, a.a. al-abidi, s. mat, k. sopian, m.h. ruslan, m.y. sulaiman & m.a.m. rosli.  (2015).  review of the application of phase change material for heating and domestic hot water systems.  - renewable and sustainable energy reviews.  557-568. 

ahmad fudholi,kamaruzzaman sopian, mohamed gabbasa, b.bakhtyar, m. yahya, mohd hafidz ruslan, sohif mat.  (2015).  techno-economic of solar drying systems with water based solar collectors in malaysia: a review.  - renewable and sustainable energy reviews.  809-820. 

s. misha, s. mat, m.h. ruslan, e. salleh, k. sopian.  (2015).  performance of a solar assisted solid desiccant dryer for kenaf core fiber drying under low solar radiation.  - solar energy.  194-204. 

willy tjiu,tjukup marnoto, sohif mat,mohd hafidz ruslan,kamaruzzaman sopian.  (2015).  darrieus vertical axis wind turbine for power generation ii: challenges in hawt and the opportunity of multi-megawatt darrieus vawt development.  - renewable energy.  560-571. 

ahmad fudholi, kamaruzzaman sopian, m a alghoul, mohd hafidz ruslan & mohd yusof othman.  (2015).  performances and improvement potential of solar drying system for palm oil fronds.  - renewable energy.  561-565. 

f. hussain, myh othman, b yatim, h ruslan, k sopian, z. anuar & s. khairuddin.  (2015).  an improved design of photovoltaic/thermal solar collector.  - solar energy.  885-891. 

ahmad fudholi, kamaruzzaman sopian, b. bakhtyar, mohamed gabbasa, mohd yusof othman, mohd hafidz ruslan.  (2015).  review of solar drying systems with air based solar collectors in malaysia.  - renewable and sustainable energy reviews.  1191-1204. 

ahmad fudholi, kamaruzzaman sopian, mohd yusof othman, mohd hafidz ruslan.  (2014).  energy and exergy analyses of solar drying system of red seaweed.  - energy and buildings.  68:121-129. 

ahmad fudholi, kamaruzzaman sopian, mohammad h. yazdi, mohd hafidz ruslan, mohamed gabbasa, hussein a. kazem.  (2014).  performance analysis of solar drying system for red chili.  - solar energy.  99:47-54. 

ahmad fudholi, kamaruzzaman sopian, mohammad h. yazdi, mohd hafidz ruslan, adnan ibrahim, hussein a. kazem.  (2014).  performance analysis of photovoltaic thermal (pvt) water collectors.  - energy conversion and management.  78:641-651. 

ali najah al-shamani, mohammad h.yazdi, m.a.alghoul,azher m.abed, m.h. ruslan, sohif mat, k.sopian.  (2014).  nanofluids for improved efficiency in cooling solar collectors - a review.  - renewable and sustainable energy reviews.  38:348-367. 

m. m. s. dezfouli, s. mat, g. pirasteh, k. s. m. sahari, k. sopian, and m. h. ruslan.  (2014).  simulation analysis of the four configurations of solar desiccant cooling system using evaporative cooling in tropical weather in malaysia.  - international journal of photoenergy.  2014:Article ID 843617. 

adnan ibrahim, ahmad fudholi, kamaruzzaman sopian, mohd yusof othman, mohd hafidz ruslan.  (2014).  efficiencies and improvement potential of building integrated photovoltaic thermal (bipvt) system.  - energy conversion and management.  527-534. 

ahmad fudholi, kamaruzzaman sopian, mohd yusof othman, mohd hafidz ruslan, b. bakhtyar.  (2013).  energy analysis and improvement potential of finned double-pass solar collector.  - energy conversion and management.  75:234-240. 

eman sad ashour, mohamad yusof bin sulaiman, mohd hafidz ruslan and kamaruzzaman sopian.  (2013).  a-si:h/sinw shell/core for sinw solar cell applications.  - nanoscale research letters.  8(1):Art no.466. 

s.m.c. fairuz m.y. sulaiman c.h. lim s. mat b. ali o. saadatian m.h. ruslan e. salleh k. sopian.  (2013).  long term strategy for electricity generation in peninsular malaysia - analysis of cost and carbon footprint using message.  - energy policy.  62:493-502. 

rada zarasvand asadi, fatihah suja, mohd hafidz ruslan, nuruláin abd jalil.  (2013).  the application of a solar still in domestic and industrial wastewater treatment..  - solar energy.  93:63-71. 

f. hussain, m.y.h. othman, k. sopian, b. yatim, h. ruslan, h. othman.  (2013).  design development and performance evaluation of photovoltaic/thermal(pv/t) air base solar collector.  - renewable and sustainable energy reviews.  25:431-441. 

ahmad fudholi, mohd yusof othman, mohd hafidz ruslan, and kamaruzzaman sopian.  (2013).  drying of malaysian capsicum annuum l. (red chili) dried by open and solar drying.  - international journal of photoenergy.  Article no.167895. 

yousef a. eltbaakh, m.h. ruslan, m.a. alghoul, m.y. othman, k. sopian.  (2013).  measurements of spectral-band solar irradiance in bangi, malaysia.  - solar energy.  89:62-80. 

ahmad fudholi, kamaruzzaman sopian, mohd hafidz ruslan, mohd yusof othman.  (2013).  performance and cost benefits analysis of double-pass solar collector with and without fins.  - energy conversion and management.  76:8-19. 

mohd yusof othman, adnan ibrahim, goh li jin, mohd hafidz ruslan, kamaruzzaman sopian.  (2013).  photovoltaic-thermal (pv/t) technology - the future energy technology.  - renewable energy.  171-174. 

yousef a. eltbaakh, m.h. ruslan, m.a. alghoul, m.y. othman, k. sopian.  (2012).  issues concerning atmospheric turbidity indices.  - renewable and sustainable energy reviews.  16(8):6285-6294. 

s. misha, s.mat, m.h.ruslan, k. sopian.  (2012).  review of solid/liquid desiccant in the drying applications and its regeneration methods.  - renewable and sustainable energy reviews.  16:4686-4707. 

yousef a. eltbaakh, m.h. ruslan, m.a. alghoul, m.y. othman, k. sopian & t.m. razykov.  (2012).  solar attenuation by aerosols: an overview.  - renewable and sustainable energy reviews.  16(6):4264-4276. 

mahmud m. alkilani, k. sopian, m.a. alghoul, m. sohif, m.h. ruslan.  (2011).  review of solar air collectors with thermal storage units.  - renewable and sustainable energy reviews.  15:1476-1490. 

li jin goh, mohd yusof othman, sohif mat, hafidz ruslan, kamaruzzaman sopian.  (2011).  review of heat pump systems for drying application.  - renewable and sustainable energy reviews.  15:4788-4796. 

ronak daghigh, adnan ibrahim, goh li jin, mohd hafidz ruslan, kamaruzzaman sopian.  (2011).  predicting the performance of amorphous and crystalline silicon based photovoltaic solar thermal collectors.  - energy conversion and management.  1741-1747. 

yousef a. eltbaakh, m.h. ruslan, m.a. alghoul, m.y. othman, k. sopian, m.i. fadhel.  (2011).  measurement of total and spectral solar irradiance: overview of existing research.  - renewable and sustainable energy reviews.  15:1403-1426. 

f. hussain, m. y. h. othman, b. yatim, h. ruslan, k. sopian, z. anuar, s. khairuddin.  (2011).  fabrication and irradiance mapping of a low cost solar simulator for indoor testing of solar collector.  - journal of solar energy engineering.  133(4):Art. no. 044502. 

adnan ibrahim, mohd yusof othman, mohd hafidz ruslan, sohif mat, kamaruzzaman sopian.  (2011).  recent advances in flat plate photovoltaic/thermal (pv/t) solar collectors.  - renewable and sustainable energy reviews.  352-365. 

r. daghigh, m.h. ruslan, k. sopian.  (2011).  advances in liquid based photovoltaic/thermal (pv/t) collectors.  - renewable and sustainable energy reviews.  15(8):4156-4170. 

ronak daghigh , adnan ibrahim, goh li jin, mohd hafidz ruslan, kamaruzzaman sopian.  (2011).  predicting the performance of amorphous and crystalline silicon based photovoltaic solar thermal collectors.  - energy conversion and management.  52: 1741-1747. 

ronak daghigh, mohd hafidz ruslan, mohamad yusof sulaiman, kamaruzzaman sopian.  (2010).  review of solar assisted heat pump drying systems for agricultural and marine products.  - renewable and sustainable energy reviews.  14:2564-2579. 

a. fudholi, k. sopian, m.h. ruslan, m.a. alghoul, m.y. sulaiman.  (2010).  review of solar dryers for agricultural and marine products.  - renewable and sustainable energy reviews.  14(1):1-30.