期刊
ADVANCED ENERGY MATERIALS
卷 8, 期 31, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201800529
关键词
organic solar cells; semitransparent; small-molecular acceptors; tandem
类别
资金
- National Basic Research Program of China (973 Program) [2013CB834701, 2014CB643501]
- Hong Kong Research Grants Council [T23-407/13 N, N_HKUST623/13, 16305915, 16322416, 606012]
- HK JEBN Limited
- HKUST president's office [FP201]
- National Science Foundation of China [21374090]
- Hong Kong Innovation and Technology Commission [ITC-CNERC14SC01, ITS/083/15]
- Ministry of science and technology China [2016YFA0200700]
- NSFC [21504066, 21534003]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
Semitransparent organic solar cells have great potential for building integrated photovoltaics and power-generating windows owing to their advantages of light weight, mechanical flexibility, and color tunability. However, the performance of previous semitransparent organic solar cells have been limited by their relatively weak optical absorptions. In this paper, an efficient nonfullerene semitransparent tandem organic solar cell that exhibits a broad absorption from 300 to 1000 nm is reported. The rear subcell is based on a narrow-bandgap nonfullerene acceptor named IEICS-4F that exhibits a strong crystallinity and high electron mobility. As a result, the IEICS-4F-based single-junction opaque and semitransparent organic solar cells yield high efficiencies of 10.3% and 7.5%, respectively. To further enhance light harvesting of the single-junction semitransparent organic solar cells while maintaining a decent transmittance, a semitransparent tandem organic solar cell is fabricated by incorporating a medium-bandgap P3TEA: FTTB-PDI4 blend as the front subcell. A high efficiency of 10.5% is recorded with an average transmittance of 20%.
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