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Roles of Long-Chain Alkylamine Ligands in Triple-Halide Perovskites for Efficient NiOx-Based Inverted Perovskite Solar Cells
Solar RRL ( IF 6.0 ) Pub Date : 2022-02-08 , DOI: 10.1002/solr.202101082 Hui Ju 1, 2 , Yajie Ma 2 , Ye Cao 1 , Zixuan Wang 2 , Liming Liu 2 , Meixiu Wan 2 , Tahmineh Mahmoudi 3 , Yoon-Bong Hahn 3 , Yousheng Wang 2 , Yaohua Mai 2
Solar RRL ( IF 6.0 ) Pub Date : 2022-02-08 , DOI: 10.1002/solr.202101082 Hui Ju 1, 2 , Yajie Ma 2 , Ye Cao 1 , Zixuan Wang 2 , Liming Liu 2 , Meixiu Wan 2 , Tahmineh Mahmoudi 3 , Yoon-Bong Hahn 3 , Yousheng Wang 2 , Yaohua Mai 2
Affiliation
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The passivation of perovskite bulk and heterointerface defects is one of the most significant ways to enhance the efficiency and operational stability of perovskite solar cells (PSCs). So far, ammonium-based alkylamine halides have been considered as effective passivation materials to reduce defects of the perovskite absorber layer. Herein, roles of long-chain alkylamine ligands (LALs) in triple-halide perovskites are systematically studied for achieving efficient NiOx-based inverted PSCs. Two kinds of LALs oleylammonium (OAm) and phenethylammonium (PEA), as perovskite bulk and interface passivation agents, respectively, are introduced. It is found that both OAm and PEA ligands cannot only assist their crystal growth with vertical orientation, but also suppress triple-halide perovskite bulk and interface defects. As precursor additives, OAm ligands can be used as organic spacers to assist the generation of the 2D@3D perovskite bulk crystals. 2D@3D/2D perovskite heterostructures are further formed when the 2D@3D perovskite bulk film is post-treated by PEA ligands. As a result, such strategies enable hysteresis-free and highly efficient NiOx-based triple-halide inverted PSCs.
中文翻译：
长链烷基胺配体在三卤化物钙钛矿中的作用，用于高效 NiOx 基倒置钙钛矿太阳能电池
钙钛矿体和异质界面缺陷的钝化是提高钙钛矿太阳能电池（PSC）效率和运行稳定性的最重要方法之一。到目前为止，铵基烷基胺卤化物已被认为是有效的钝化材料，以减少钙钛矿吸收层的缺陷。本文系统地研究了长链烷基胺配体 (LAL) 在三卤化物钙钛矿中的作用，以实现高效的 NiO x-基于倒置的 PSC。介绍了两种 LAL 油基铵 (OAm) 和苯乙基铵 (PEA)，分别作为钙钛矿体钝化剂和界面钝化剂。发现 OAm 和 PEA 配体不仅可以帮助其垂直取向的晶体生长，而且可以抑制三卤化物钙钛矿的体积和界面缺陷。作为前体添加剂，OAm 配体可用作有机间隔物，以帮助生成 2D@3D 钙钛矿块状晶体。当 2D@3D 钙钛矿体膜经 PEA 配体后处理时，进一步形成 2D@3D/2D 钙钛矿异质结构。因此，此类策略可实现无滞后且高效的 NiO x基三卤化物倒置 PSC。
更新日期：2022-02-08
中文翻译：
长链烷基胺配体在三卤化物钙钛矿中的作用，用于高效 NiOx 基倒置钙钛矿太阳能电池
钙钛矿体和异质界面缺陷的钝化是提高钙钛矿太阳能电池（PSC）效率和运行稳定性的最重要方法之一。到目前为止，铵基烷基胺卤化物已被认为是有效的钝化材料，以减少钙钛矿吸收层的缺陷。本文系统地研究了长链烷基胺配体 (LAL) 在三卤化物钙钛矿中的作用，以实现高效的 NiO x-基于倒置的 PSC。介绍了两种 LAL 油基铵 (OAm) 和苯乙基铵 (PEA)，分别作为钙钛矿体钝化剂和界面钝化剂。发现 OAm 和 PEA 配体不仅可以帮助其垂直取向的晶体生长，而且可以抑制三卤化物钙钛矿的体积和界面缺陷。作为前体添加剂，OAm 配体可用作有机间隔物，以帮助生成 2D@3D 钙钛矿块状晶体。当 2D@3D 钙钛矿体膜经 PEA 配体后处理时，进一步形成 2D@3D/2D 钙钛矿异质结构。因此，此类策略可实现无滞后且高效的 NiO x基三卤化物倒置 PSC。
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