材料科学
卷到卷处理
钙钛矿(结构)
光伏
电极
欧姆接触
纳米技术
能量转换效率
光电子学
碳纤维
光伏系统
复合材料
图层(电子)
化学工程
电气工程
复合数
化学
物理化学
工程类
作者
David Beynon,Ershad Parvazian,Katherine Hooper,James McGettrick,Rahul Patidar,Tom Dunlop,Zhengfei Wei,Peter W. F. Davies,Rodrigo García-Rodríguez,Matthew J. Carnie,Matthew L. Davies,Trystan Watson
标识
DOI:10.1002/adma.202208561
摘要
Perovskite photovoltaics have shown great promise in device efficiency but also the promise of scalability through solution-processed manufacture. Efforts to scale perovskites have been taken through printable mesoporous scaffolds and slot die coating of flexible substrates roll-to-roll (R2R). However, to date there has been no demonstration of entirely R2R-coated devices due to the lack of a compatible solution-processable back electrode; instead, high-value evaporated metal contacts are employed as a post process. Here, in this study, the combination of a low-temperature device structure and R2R-compatible solution formulations is employed to make a fully R2R printable device architecture overcoming interlayer incompatibilities and recombination losses. Therefore, the n-i-p device structure of SnO2 /perovskite/poly(3,4-ethylenedioxythiophene)/carbon is employed to form an ohmic contact between a p-type semiconductor and printable carbon electrode. In particular, the results show that the small-scale device efficiencies of 13-14% are achieved, matching the device performance of evaporated gold electrodes. Also, this entirely R2R-coated perovskite prototype represents a game changer, reaching over 10% (10.8) stabilized power conversion efficiency with unencapsulated long-term stability retaining 84% of its original efficiency over 1000 h under 70% RH and 25 °C.
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