Enhanced photovoltaic performances via ternary blend strategy employing a medium-bandgap D-A type alternating copolymer as the single donor
| Autor: | Yunxiang Chen, Qidan Ling, Guofeng You, Qixin Zhuang, Ding Zou, Hongyu Zhen |
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| Rok vydání: | 2019 |
| Předmět: |
Electron mobility
Materials science Renewable Energy Sustainability and the Environment Band gap 020209 energy Energy conversion efficiency 02 engineering and technology 021001 nanoscience & nanotechnology Miscibility Cathode Polymer solar cell law.invention Chemical engineering law 0202 electrical engineering electronic engineering information engineering Copolymer General Materials Science 0210 nano-technology Ternary operation |
| Zdroj: | Solar Energy. 183:350-355 |
| ISSN: | 0038-092X |
| Popis: | In this work, a medium-bandgap polymer POBDFBT was synthesized and served as the single donor in binary and ternary polymer solar cells (PSCs) together with two acceptors (ITIC and PC71BM). A promising power conversion efficiency (PCE) of 7.91% with a high short-circuit current density (JSC) of 17.65 mA cm−2 is achieved from the ternary PSC without any cathode modification layer. The enhancement of JSC in ternary PSCs can be attributed to the complementary absorption and cascade-like energy level of the two acceptors. With alkoxyl substitution in the electron-donating unit, POBDFBT presents good miscibility with ITIC and PC71BM respectively, while a more optimized morphology of the ternary bulk heterojunction (BHJ) lead to the enhanced and balanced hole/electron mobility of the devices. Our results demonstrate a facile method for developing new polymeric donors for serving as the universal donors in binary and ternary PSCs. |
| Databáze: | OpenAIRE |
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