| Fine-tuning device performances of small molecule solar cells via the more polarized DPP-attached donor units. | |
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MedLine Citation:
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PMID: 22847595 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Three solution-processable small molecules of , and were synthesized by Stille coupling through attaching donor units of thiophene (T), selenophene (Se) and thieno[3,2-b]thiophene (TT) to the diketopyrrolopyrrole (DPP) core, respectively. Replacement of the T donors with the more polarized Se units results in a balance between the a and b direction packing and an obvious increase of the power conversion efficiency (PCE) from 1.90% to 2.33% with the increase of the short-circuit current (I(sc)) from 5.59 to 5.81 mA cm(-2) and the open-circuit voltage (V(oc)) from 0.78 V to 0.86 under the small molecule/acceptor ratio of 3 : 1. However, introduction of the conjugation-enlarged TT groups (versus the T units) leads to a decrease of the PCE, down to 1.70%, with a significant decrease of the fill factor (FF) (38% versus 44%), due to its poor film-forming characteristics. |
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Authors:
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Jianhua Huang; Hui Jia; Liangjie Li; Zhenhuan Lu; Wenqing Zhang; Weiwei He; Bo Jiang; Ailing Tang; Zhan'ao Tan; Chuanlang Zhan; Yongfang Li; Jiannian Yao |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-7-31 |
Journal Detail:
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Title: Physical chemistry chemical physics : PCCP Volume: - ISSN: 1463-9084 ISO Abbreviation: - Publication Date: 2012 Jul |
Date Detail:
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Created Date: 2012-7-31 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100888160 Medline TA: Phys Chem Chem Phys Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Beijing National Laboratory of Molecular Science, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China. clzhan@iccas.ac.cn jnyao@iccas.ac.cn. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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