硫氰酸盐
钙钛矿(结构)
卤化物
钝化
甲脒
钙钛矿太阳能电池
材料科学
离子
无机化学
化学工程
化学
纳米技术
结晶学
有机化学
图层(电子)
工程类
作者
Pei-Yu Lin,Chen‐Fu Lin,Yueh‐Ya Chiu,Hong‐Hsueh Chen,Ming-Hsien Li,Rajendran Raja,Chun‐Sheng Wu,Cheng‐Hung Hou,Shih-Hsin Hsiao,Jing‐Jong Shyue,Der–Chuen Lee,Sheng‐Zhu Ho,Yi‐Chun Chen,Peter Chen
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-12-19
卷期号:6 (1): 79-88
被引量:3
标识
DOI:10.1021/acsaem.2c02291
摘要
The use of a pseudo-halide anion, such as thiocyanate (SCN–), as an additive in the composition-engineered perovskite film is verified and its impact on the perovskite solar cell (PSCs) performance is investigated. The perovskite precursor added with a small amount of formamidinium thiocyanate is deposited by a one-step solution process to prepare the perovskite film. We observe a significant enlargement in domain size after the incorporation of thiocyanate ions in the perovskite film. Moreover, a trace amount of thiocyanate groups across the perovskite film measured by the time-of-flight secondary ion mass spectrometer identifies the thiocyanate existing inside the perovskite bulk, especially near the film bottom. Replacement of halide with thiocyanate groups in the perovskite framework effectively suppresses bulk recombination in the perovskite film, leading to an improvement on the open-circuit voltage (VOC) and fill factor for the pseudo-halide-based PSCs. Our studies confirm the existence of SCN– in the final film and the passivation effect of SCN– for enhancing the device performance.
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