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JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 58, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/1347-4065/aafb56
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We attempt the conformal deposition of CsPbI3 layers on pyramidal-shaped textured crystalline Si (c-Si) surfaces, aiming at application to Perovskite/Si tandem solar cells. CsPbI3 layers are deposited through vacuum evaporation on textured c-Si surfaces with various pyramid sizes. Conformal CsPbI3 layers are formed on the textured c-Si, which is, in principle, difficult to be realized by conventional solution processes. We also confirmed a reduction in the optical reflectance ofCsPbI(3)/Si structures by similar to 10% (absolute) by using textured c-Si compared to the case of flat Si. A co-evaporation method can prevent the aggregation of Csl particles, which are seen when the films are formed by sequential evaporation. These results indicate the feasibility of Perovskite/c-Si tandem cells with textured c-Si, leading to low optical reflectivity and a high photocurrent. (C) 2019 The Japan Society of Applied Physics
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