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dc.contributor.authorLi, Chang Mingen
dc.contributor.authorYang, Hong Binen
dc.contributor.authorWang, Xizuen
dc.contributor.authorKhoo, Si Yunen
dc.contributor.authorLiu, Binen
dc.contributor.authorDong, Yong Qianen
dc.identifier.citationYang, H. B., Dong, Y. Q., Wang, X., Khoo, S. Y., Liu, B., & Li, C. M. (2013). Graphene quantum dots-incorporated cathode buffer for improvement of inverted polymer solar cells. Solar Energy Materials and Solar Cells, 117, 214-218.en
dc.description.abstractGraphene quantum dots (GQDs) are an emerging class of nanomaterials with unique photonic and electric properties. In this study, GQDs were prepared by a facile, inexpensive and high-yield hydrothermal method and were further used as a cathode buffer additive for inverted polymer solar cells due to a wide band gap (~3.3 eV) and well-matched energy level between GQDs–cesium carbonate (GQDs–Cs2CO3) modified indium tin oxide (3.8 eV) and high occupied molecular orbit of [6,6]-phenyl-C61-butyric acid methyl ester (3.7 eV). In comparison to inverted polymer solar cells using cesium carbonate (Cs2CO3) buffer layer, the power conversion efficiency of GQDs–Cs2CO3 based device showed 22% enhancement from 2.59% to 3.17% as a result of enhanced exciton dissociation and suppressed free charge recombination at cathode/polymer active layer interface by GQDs. This work provides a new application of GQDs in organic electronic devices.en
dc.description.sponsorshipASTAR (Agency for Sci., Tech. and Research, S’pore)en
dc.relation.ispartofseriesSolar Energy Materials and Solar Cellsen
dc.rights© 2013 Elsevier.en
dc.subjectQuantum dotsen
dc.titleGraphene quantum dots-incorporated cathode buffer for improvement of inverted polymer solar cellsen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen
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