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用于制备具有更高稳定性的高性能太阳能电池的含二维钙钛矿铵阳离子的立方钙钛矿合金的形成。

Formation of cubic perovskite alloy containing the ammonium cation of 2D perovskite for high performance solar cells with improved stability.

作者信息

Jung Mi-Hee

机构信息

Department of Nanotechnology and Advanced Materials Engineering, Sejong University 209, Neungdong-ro, Gwangjin-gu Seoul 05006 Republic of Korea

出版信息

RSC Adv. 2021 Oct 4;11(52):32590-32603. doi: 10.1039/d1ra04520b.

DOI:10.1039/d1ra04520b
PMID:35493593
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9041991/
Abstract

The perovskite solar cells have demonstrated to be strong competitors for conventional silicon solar cells due to their remarkable power conversion efficiency. However, their structural instability is the biggest obstacle to commercialization. To address these issues, we prepared (CHNH) (HC(NH)) PbI (CHNH = MA, HC(NH) = FA) perovskite alloys that contain ethylammonium (EA, CHCHNH ) and benzylammonium (BA, CHCHNH ) cations with no new additional two-dimensional (2D) perovskite phases. The crystal structures of alloy perovskites exhibit the cubic phase, which decreased the cation disorder and the intrinsic instability compared to 3D MAPbI perovskite. The band gaps of the alloy perovskites are almost the same as the corresponding 3D perovskites, which exhibit a high refractive index, a large absorption coefficient, and paramagnetic properties for the production of high performance photovoltaic devices. After we constructed the solar cell with the configuration of regular (n-i-p) solar cells using the alloy perovskites, the power conversion efficiencies (PCE) of the MAEAPbI perovskite solar cell showed the highest efficiency, which was 10.22%, under 1 sun illumination.

摘要

由于其卓越的功率转换效率，钙钛矿太阳能电池已被证明是传统硅太阳能电池的有力竞争对手。然而，其结构不稳定性是商业化的最大障碍。为了解决这些问题，我们制备了（CHNH）（HC（NH））PbI（CHNH = MA，HC（NH） = FA）钙钛矿合金，其中含有乙铵（EA，CHCHNH）和苄铵（BA，CHCHNH）阳离子，且没有新的额外二维（2D）钙钛矿相。合金钙钛矿的晶体结构呈现立方相，与3D MAPbI钙钛矿相比，这降低了阳离子无序性和固有不稳定性。合金钙钛矿的带隙与相应的3D钙钛矿几乎相同，其具有高折射率、大吸收系数和顺磁特性，可用于生产高性能光伏器件。在用合金钙钛矿构建具有常规（n-i-p）太阳能电池结构的太阳能电池后，MAEAPbI钙钛矿太阳能电池在1个太阳光照下的功率转换效率（PCE）显示出最高效率，为10.22%。

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