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27%‐Efficiency Four‐Terminal Perovskite/Silicon Tandem Solar Cells by Sandwiched Gold Nanomesh
Author(s) -
Wang Ziyu,
Zhu Xuejie,
Zuo Shengnan,
Chen Ming,
Zhang Cong,
Wang Chenyu,
Ren Xiaodong,
Yang Zhou,
Liu Zhike,
Xu Xixiang,
Chang Qing,
Yang Shaofei,
Meng Fanying,
Liu Zhengxin,
Yuan Ningyi,
Ding Jianning,
Liu Shengzhong Frank,
Yang Dong
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201908298
Subject(s) - materials science , optoelectronics , nanomesh , tandem , energy conversion efficiency , perovskite (structure) , layer (electronics) , silicon , nanotechnology , graphene , composite material , chemical engineering , engineering
Multijunction/tandem solar cells have naturally attracted great attention because they are not subject to the Shockley–Queisser limit. Perovskite solar cells are ideal candidates for the top cell in multijunction/tandem devices due to the high power conversion efficiency (PCE) and relatively low voltage loss. Herein, sandwiched gold nanomesh between MoO 3 layers is designed as a transparent electrode. The large surface tension of MoO 3 effectively improves wettability for gold, resulting in Frank–van der Merwe growth to produce an ultrathin gold nanomesh layer, which guarantees not only excellent conductivity but also great optical transparency, which is particularly important for a multijunction/tandem solar cell. The top MoO 3 layer reduces the reflection at the gold layer to further increase light transmission. As a result, the semitransparent perovskite cell shows an 18.3% efficiency, the highest reported for this type of device. When the semitransparent perovskite device is mechanically stacked with a heterojunction silicon solar cell of 23.3% PCE, it yields a combined efficiency of 27.0%, higher than those of both the sub‐cells. This breakthrough in elevating the efficiency of semitransparent and multijunction/tandem devices can help to break the Shockley–Queisser limit.