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Charge transport and electron recombination suppression in dye-sensitized solar cells using graphene quantum dots

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dc.citedby38
dc.contributor.authorM. Sharif N.F.en_US
dc.contributor.authorKadir M.Z.A.A.en_US
dc.contributor.authorShafie S.en_US
dc.contributor.authorRashid S.A.en_US
dc.contributor.authorWan Hasan W.Z.en_US
dc.contributor.authorShaban S.en_US
dc.contributor.authorid57207695760en_US
dc.contributor.authorid25947297000en_US
dc.contributor.authorid23991445600en_US
dc.contributor.authorid55041302700en_US
dc.contributor.authorid57219410727en_US
dc.contributor.authorid57204588013en_US
dc.date.accessioned2023-05-29T07:25:30Z
dc.date.available2023-05-29T07:25:30Z
dc.date.issued2019
dc.description.abstractIn this study, TiO 2 photoelectrodes were sensitized in different concentration of Graphene Quantum Dots (GQDs) solution to enhance photovoltaic performance and charge transport of DSSC. The performance of pristine TiO 2 and TiO 2 -GQDs photoelectrodes were compared to investigate the effect of GQDs incorporation in DSSC. It was found GQDs increased light absorption of TiO 2 photoelectrode at visible spectrum in the range of ? = 375 nm to ? = 600 nm, resulting highest current�density, Jsc and photon-to-current conversion efficiency, ?c. Solar cell sensitized in 7.5 mg/ml concentration of GQDs known as (PG 7.5) cell shown the highest reading by 15.49 mA cm ?2 and 6.97%, which indicated an improvement by 28.07% and 70.83% for Jsc and ? compare to pristine TiO 2 DSSC at 12.10 mA cm ?2 and 4.08%. Photoluminescence property own by GQDs may enhance photon emission to visible region when uv-ray excited on solar cell. Thus, generate more electron-hole pairs in the photoelectrode and enhance the photovoltaic parameters of DSSC. PG 7.5 cell also exhibited lowest series resistance (Rs) of 36.60 ?, highest charge transfer resistance (Rct2) of 41.98 ? and electron lifetime of 6.33 ms among other DSSC. These possibly due to suppression of recombination between TiO 2 /dye/electrolyte interfaces. Hence, resulting highest charge collection efficiency (CCE) of 53.42%. The EIS analysis confirmed the PV performance of the best cell of PG 7.5 since the same cell also generated the best photon-current conversion efficiency (PCE). This study revealed GQDs can enhanced photovoltaic parameter and charge collection efficiency of DSSC. � 2019 The Authorsen_US
dc.description.natureFinalen_US
dc.identifier.ArtNo102171
dc.identifier.doi10.1016/j.rinp.2019.102171
dc.identifier.scopus2-s2.0-85062719177
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85062719177&doi=10.1016%2fj.rinp.2019.102171&partnerID=40&md5=642224655aacd4dd2480457a1170a40d
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/24651
dc.identifier.volume13
dc.publisherElsevier B.V.en_US
dc.relation.ispartofAll Open Access, Gold, Green
dc.sourceScopus
dc.sourcetitleResults in Physics
dc.titleCharge transport and electron recombination suppression in dye-sensitized solar cells using graphene quantum dotsen_US
dc.typeArticleen_US
dspace.entity.typePublication
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