文章基本信息

标题：Perovskite/CIGS Spectral Splitting Double Junction Solar Cell with 28% Power Conversion Efficiency
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作者：Motoshi Nakamura ; Keishi Tada ; Takumi Kinoshita 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2020
卷号：23
期号：12
页码：1-14
DOI：10.1016/j.isci.2020.101817
语种：English
出版社：Elsevier
摘要：SummaryThe highest theoretical efficiency of double junction solar cells is predicted for architectures with the bottom cell bandgap (Eg) of approximately 0.9–1.0 eV, which is lower than that of a typical Si cell (1.1 eV). Cu(In,Ga)(Se,S)2(CIGS) solar cells exhibit a tunableEgdepending on their elemental composition and depth profile. In this study, various CIGS solar cells withEgranging from 1.02 to 1.14 eV are prepared and a spectrum splitting system is used to experimentally demonstrate the effect of using lower-Egcells as the bottom cell of two-junction solar cells. The four-terminal tandem cell configuration fabricated using a mixed-halide perovskite top cell (Eg = 1.59 eV; stand-alone efficiency = 21.0%) and CIGS bottom cell (Eg = 1.02 eV; stand-alone efficiency = 21.5%) with a 775-nm spectral splitting mirror exhibits an efficiency of 28.0% at the aperture area of 1 cm2.Graphical AbstractDisplay OmittedHighlights•CIGS bottom solar cells withEgranging from 1.02 to 1.14 eV are prepared•The lower theEgof CIGS bottom cell, the higher PCE of PVK/CIGS tandem solar cell•PCE of 28% was demonstrated in a 1 cm2-sized PVK/CIGS 4-Terminal solar cell•The result can be utilized to design better tandem solar cell in the futureInorganic Materials; Optical Materials; Materials Science; Materials Application; Energy Materials