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Light Management in Monolithic Perovskite/Silicon Tandem Solar Cells
Author(s) -
Xu Qiaojing,
Zhao Ying,
Zhang Xiaodan
Publication year - 2020
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201900206
Subject(s) - tandem , perovskite (structure) , photovoltaics , silicon , materials science , optoelectronics , refractive index , absorption (acoustics) , photovoltaic system , engineering physics , optics , electrical engineering , engineering , physics , composite material , chemical engineering
Perovskite/silicon tandem solar cells (TSCs), especially two‐terminal, with a record efficiency of 28% already realized, present great potential as low‐cost and efficient substitutes for dominant silicon photovoltaics. Achieving efficiencies exceeding 30% is quite realistic, as indicated by extensive optical simulations. Super light management in monolithic perovskite/silicon TSCs is one of the prerequisites to make this a reality. In this Review, various forms of optical losses, such as reflection loss, parasitic absorption, and current mismatch, are analyzed systematically to provide a better understanding of the performance of perovskite/silicon TSCs. Particularly, a simple refractive index matching rule derived from the Fresnel equation is proposed as a basis for material selection and device design. Meanwhile, an overview of the current strategies and challenges in monolithic perovskite/silicon TSCs is provided, comprising bandgap engineering of perovskites and light trapping methods, aiming to provide guidance for further improvement of tandem devices.