Efficient Enhancement of Electron Transport and Collection Capability in PTB7:PC 71 BM-based Solar Cells Enabled by Sulforhodamine Cathode Interlayers
Development of low-cost water-/alcohol-soluble interfacial materials is a crucial issue to promote the commercialization of polymer solar cells (PSCs). Herein, two derivatives of low-cost rhodamine, called sulforhodamine 101 (SR101) and sulforhodamine B (SRB), are applied as cathode interfacial laye...
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Published in | Chemistry, an Asian journal Vol. 14; no. 9; pp. 1472 - 1476 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Germany
02.05.2019
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Subjects | |
Online Access | Get full text |
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Summary: | Development of low-cost water-/alcohol-soluble interfacial materials is a crucial issue to promote the commercialization of polymer solar cells (PSCs). Herein, two derivatives of low-cost rhodamine, called sulforhodamine 101 (SR101) and sulforhodamine B (SRB), are applied as cathode interfacial layers (CILs) to effectively improve the charge-carrier transportation and collection, reduce the work function (WF) of Al counter electrode, and decrease the series resistance and charge recombination in the PSCs. As a result, SR101-based devices show excellent performance with the highest power conversion efficiency (PCE) of 9.10 %, superior to that of both the control devices with MeOH/Al and Ca/Al. Notably, sulforhodamine is commercially available with low cost and great solution-processability. This work demonstrates that sulforhodamine has a great potential as a CIL material,which is suitable for the large-area fabrication process and commercialization of highly efficient PSCs. |
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ISSN: | 1861-4728 1861-471X |
DOI: | 10.1002/asia.201900015 |