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. 

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. 

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. 

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. 

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. 

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. 

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. 

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.  . 

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. 

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. 

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. 

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.  . 

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. 

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. 

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. 

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. 

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.  . 

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.  . 

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 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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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, 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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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, 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. 

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. 

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. 

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. 

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. 

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. 

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, 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. 

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.