期刊
ADVANCED ENERGY MATERIALS
卷 9, 期 5, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201803438
关键词
crop growth factor; photovoltaic greenhouse; semitransparent polymer solar cells; spectral engineering
类别
资金
- Ministry of Science and Technology [2017YF0206600]
- Science and Technology Program of Guangzhou, China [201607020010, 2017A050503002]
- Natural Science Foundation of China [21761132001, 91633301]
- China Postdoctoral Science Foundation [2017M622681]
In this study, a wavelength selective semitransparent polymer solar cell (ST-PSC) with a proper transmission spectrum for plant growth is proposed for greenhouse applications. A ternary strategy combining a wide bandgap polymer donor with a near-infrared absorbing nonfullerene acceptor and a high electron mobility fullerene acceptor is introduced to achieve PSCs with power conversion efficiency (PCE) over 10%. The addition of PC71BM into J52:IEICO-4F binary blend contributes to the suppressed trap-assisted recombination, enhanced charge extraction, and improved open-circuit voltage simultaneously. ST-PSC based on the J52:IEICO-4F:PC71BM ternary blend shows an optimized performance with PCE of 7.75% and a defined crop growth factor of 24.8%. Such high-performance ST-PSC is achieved by carefully engineering the absorption spectrum of the light harvesting materials. As a result, the transmission spectra of the semitransparent devices are well-matched with the absorption spectra of the photoreceptors, such as chlorophylls, in green plants, which provides adequate lighting conditions for photosynthesis and plant growth, and therefore making it a competitive candidate for photovoltaic greenhouse applications.
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