Formamidinium-based Ruddlesden–Popper perovskite films fabricated via two-step sequential deposition: quantum well formation, physical properties and film-based solar cells†
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作者:Jing Lu,‡a Tinghuan Yang,‡a Tianqi Niu,‡a Nuo Bu,a Yalan Zhang,a Shiqiang Wang,a Junjie Fang,a Xiaoming Chang,a Tao Luo,a Jialun Wen,a Yingguo Yang, b Zicheng Ding,*a Kui Zhao *ac and Shengzhong (Frank) Liu *ad
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发布时间: 1160天前
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1242 次浏览
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Jing Lu,‡ Tinghuan Yang,‡ Tianqi Niu,‡ Nuo Bu, Yalan Zhang, Shiqiang Wang, Junjie Fang, Xiaoming Chang, Tao Luo, Jialun Wen, Yingguo Yang, Zicheng Ding,* Kui Zhao * Shengzhong (Frank) Liu *, Energy Environ. Sci., 2022,15, 1144-1155.
Jing Lu,‡a Tinghuan Yang,‡a Tianqi Niu,‡a Nuo Bu,a Yalan Zhang,a Shiqiang Wang,a
Junjie Fang,a Xiaoming Chang,a Tao Luo,a Jialun Wen,a Yingguo Yang, Zicheng Ding,* Kui Zhao * and Shengzhong (Frank) Liu *
ABSTRACT:
The use of layered perovskites is an important strategy to stabilize a formamidinium (FA) based photoactive a-FAPbI3 phase. However, the growth mechanism of FA-based layered perovskites and its influence on their physical properties have not yet been reported. Herein, we demonstrate an inclusive study on the growth, structure and optoelectronic properties of FA-based Ruddlesden–Popper (RP) type perovskites M2FAn1PbnI3n+1 (M = benzylamine (PMA) or FA) during two-step sequential deposition, revealing the transformation of dominant layered perovskites from PMA2FAn1PbnI3n+1 to novel FA2FAn1PbnI3n+1 with increasing FA : PMA ratios in precursors, and increased n values from top to bottom for the former case while a uniform distribution for the latter case. Moreover, we investigated the charge transport kinetics between quantum wells and illustrate the application of these structures in perovskite solar cells with a power conversion efficiency that exceeds 19%, accompanied by enhanced film stability in contrast to 3D analogs.
DOI: 10.1039/d1ee02851k
