Polymer solar cells with an inverted device configuration using polyhedral oligomeric silsesquioxane-[60]fullerene dyad as a novel electron acceptor |
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| Authors: | Wen-Bin Zhang YingFeng Tu Hao-Jan Sun Kan Yue Xiong Gong Stephen Z. D. Cheng |
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| Affiliation: | 1. College of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325, USA
2. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
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| Abstract: | 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 demonstrated that POSS-C60 is a potentially good electron acceptor for inverted BHJ PSCs. |
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| Keywords: | electron acceptor polyhedral oligomeric silsesquioxane fullerene polymer solar cells inverted device structure |
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