Choi, Jung Hei El-Khouly, Mohamed E. Kim, Taehee Kim, Youn-Su Yoon, Ung Chan Fukuzumi, Shunichi Kim, Kyungkon 2024-01-20T11:01:29Z 2024-01-20T11:01:29Z 2022-01-25 2013-12 1110-662X https://pubs.kist.re.kr/handle/201004/127352 We fabricated solution-processed organic photovoltaic cells (OPVs) using substituted two sexithiophenes, a,w-bis(dimethyl-n-octylsilyl)sexithiophene (DSi-6T) and a,w-dihexylsexithiophene (DH-6T), as electron donors, and [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) as an electron acceptor. Solution-processed OPVs using DH-6T and DSi-6T showed good photovoltaic properties in spite of their poor solubility. The best performance was observed on DSi-6T:PCBM 1:5 (w/w) blend cell with an open circuit voltage (V-oc) of 0.63V, short circuit current density (J(sc)) of 1.34mA/cm(2), fill factor (FF) of 55%, and power conversion efficiency of 0.44% under AM 1.5G illumination. Although DH-6T has higher hole mobility than DSi-6T, the DSi-6T:PCBM blend cell showed higher hole mobility than DH-6T:PCBM cell. Therefore, DSi-6T cell showed higher device performance than DH-6T cell due to its silyl substitutions, which lead to the increase of the solubility. The incorporation of solution-processed TiO2 interfacial layer in the DSi-6T:PCBM devices significantly enhances FF due to the reduced charge recombination near active layer/Al interface. English HINDAWI LTD Solution-Processed Bulk Heterojunction Solar Cells with Silyl End-Capped Sexithiophene Article 10.1155/2013/843615 1 INTERNATIONAL JOURNAL OF PHOTOENERGY, v.2013 INTERNATIONAL JOURNAL OF PHOTOENERGY 2013 N scie scopus 000328997600001 2-s2.0-84893835256 Chemistry, Physical Energy & Fuels Optics Physics, Atomic, Molecular & Chemical Chemistry Energy & Fuels Optics Physics Article PHOTOINDUCED ELECTRON-TRANSFER POLYMER OLIGOTHIOPHENE DEPENDENCE EFFICIENCY DESIGN FIELD