期刊
SMALL
卷 15, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201804671
关键词
air-processed solar cells; air-stable low-bandgap polymers; inverted solar cells; stability; ZnO cathode buffer layer
类别
资金
- Natural Sciences and Engineering Research Council (NSREC) of Canada
- Quebec Center for Functional Materials (CQMF) of Canada
- Fonds de Recherche du Quebec - Nature et technologies (FRQNT)
- National Natural Science Foundation of China [11811520119]
High efficiency, excellent stability, and air processability are all important factors to consider in endeavoring to push forward the real-world application of organic solar cells. Herein, an air-processed inverted photovoltaic device built upon a low-bandgap, air-stable, phenanthridinone-based ter-polymer (C150H218N6O6S4)(n) (PDPPPTD) and [6,6]-phenyl-C-61-butyric acid methyl ester (PC61BM) without involving any additive engineering processes yields a high efficiency of 6.34%. The PDPPPTD/PC61BM devices also exhibit superior thermal stability and photo-stability as well as long-term stability in ambient atmosphere without any device encapsulation, which show less performance decay as compared to most of the reported organic solar cells. In view of their great potential, solvent additive engineering via adding p-anisaldehyde (AA) is attempted, leading to a further improved efficiency of 7.41%, one of the highest efficiencies for all air-processed and stable organic photovoltaic devices. Moreover, the device stability under different ambient conditions is also further improved with the AA additive engineering. Various characterizations are conducted to probe the structural, morphology, and chemical information in order to correlate the structure with photovoltaic performance. This work paves a way for developing a new generation of air-processable organic solar cells for possible commercial application.
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