期刊
NANO RESEARCH
卷 11, 期 7, 页码 3877-3885出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1962-z
关键词
CIGS solar cell; pyro-phototronic effect; piezo-phototronic effect; piezopotential; pyropotential
类别
资金
- thousands talents program for pioneer researcher and his innovation team, China
- National Natural Science Foundation of China [11704032, 51432005, 5151101243, 51561145021]
- National Key R&D Project from Ministery of Science and Technology [2016YFA0202704]
- National Program for Support of Top-notch Young Professionals
- China Postdoctoral Science Foundation [2016M600067]
Cu(In, Ga)Se-2 (CIGS)-based materials have gained remarkable attention for thin-film photovoltaic applications due to their high absorption coefficient, tunable bandgap, compositional tolerance, outstanding stabilities, and high efficiency. A small increase in the efficiency of CIGS solar cells has huge economic impact and practical importance. As such, we fabricated a flexible CIGS solar cell on amica substrate and demonstrated the enhanced device performance through the piezo- and pyro-phototronic effects based on a ZnO thin film. The device showed enhanced energy conversion efficiency from 13.48% to 14.23% by decreasing the temperature from 31 to 2 degrees C at a rate of similar to 0.6 degrees C.s(-1) via the pyro-phototronic effect, and further enhanced from 14.23% to 14.37% via the piezo-phototronic effect by further applying a static compressive strain. A pyro-electric nanogenerator effect was also found to promote the performance of the CIGS solar cell at the beginning of the cooling process. The manipulated energy band of the CIGS/CdS/ZnO heterojunction under the influence of the inner pyroelectric and piezoelectric potentials is believed to contribute to the sephenomena. Applying the piezo- and pyro-phototronic effects simultaneously offers a new opportunity for enhancing the output performance of commercialthin film solar cells.
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