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Polymer Solar Cells With An Inverted Device Configuration Using Polyhedral Oligomeric Silsesquioxane-[60] Fullerene Dyad As A Novel Electron Acceptor, Wen-Bin Zhang, Yingfeng Tu, Hao-Jan Sun, Kan Yue, Xiong Gong, Stephen Cheng
Polymer Solar Cells With An Inverted Device Configuration Using Polyhedral Oligomeric Silsesquioxane-[60] Fullerene Dyad As A Novel Electron Acceptor, Wen-Bin Zhang, Yingfeng Tu, Hao-Jan Sun, Kan Yue, Xiong Gong, Stephen Cheng
Xiong Gong
A polyhedral oligomeric silsesquioxane-[60]fullerene (POSS-C60) dyad was designed and used as a novel electron acceptor for bulk heterojunction (BHJ) polymer solar cells (PSCs) with an inverted device configuration. The studies of time-resolved photoinduced absorption of the pristine thin film of poly[(4,4′-bis(2-ethylhexyl)dithieno[3,2-b:2′,3′-d]silole)-2,6-diyl-alt-(4,7-bis (2-thienyl)-2,1,3-benzothiadiazole)-5,5′-diyl] (SiPCPDTBT) and the composite thin film of SiPCPDTBT:POSS-C60 indicated efficient electron transfer from SiPCPDTBT to POSS-C60 with inhibited back-transfer. BHJ PSCs made by SiPCPDTBT mixed with POSS-C60 yielded the power conversion efficiencies (PCEs) of 1.50%. Under the same operational conditions, PCEs observed from BHJ PSCs made by SiPCPDTBT mixed with [6,6]-phenyl-C61-butyric acid methyl ester were 0.92%. These results …