期刊
ENERGY & FUELS
卷 35, 期 23, 页码 19045-19054出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.1c02104
关键词
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资金
- National Key Research and Development Program of China - Ministry of Science and Technology (MOST) [2019YFA0705900]
- National Natural Science Foundation of China (NSFC) [51820105003, 21734008, 61904181]
- Guangdong Major Project of Basic and Applied Basic Research [2019B030302007]
The introduction of the low-cost polymer donor PTQ10 into the PBDBT:PTPBT-ET0.1 system resulted in the formation of a ternary all-polymer solar cell with improved power conversion efficiency and excellent performance in light absorption and compatibility.
Polymerized small-molecule acceptors (PSMAs) have recently drawn much attention and rapidly boost the power conversion efficiency (PCE) of all-polymer solar cells (all-PSCs). In this study, a low-cost polymer donor PTQ10 was employed as the third component (the second polymer donor) into the PBDBT:PTPBT-ET0.1 system (where PTPBT-ET0.1 was a previously reported PSMA), and the ternary all-PSC achieved higher PCE of 14.56%. The component of PTQ10 not only leads to the extended absorption coverage but also shows excellent compatibility with PBDB-T. In addition, the highest occupied molecular orbital (HOMO) energy level of the PTQ10 donor is slightly lower than that of PBDB-T, leading to a higher open-circuit voltage. The performance of the ternary all-PSCs is primarily improved by the enhanced short-circuit current density (J(sc)) and open-circuit voltage (V-oc), which can be attributed to the enhanced exciton dissociation and balanced charge transport in the presence of PTQ10. Therefore, the addition of a second wide bandgap polymer donor into a binary polymer donor/PSMA system could be an effective way to improve the photovoltaic performance of the all-PSCs.
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