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(C6H5NH3)BiI4: a lead-free perovskite with >330 days humidity stability for optoelectronic applications†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2019-05-10 00:00:00 , DOI: 10.1039/c9ta02421b Xiao-Lei Li 1, 2, 3, 4, 5 , Li-Li Gao 1, 2, 3, 4, 5 , Bin Ding 1, 2, 3, 4, 5 , Qian-Qian Chu 1, 2, 3, 4, 5 , Zhen Li 1, 2, 3, 4, 5 , Guan-Jun Yang 1, 2, 3, 4, 5
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2019-05-10 00:00:00 , DOI: 10.1039/c9ta02421b Xiao-Lei Li 1, 2, 3, 4, 5 , Li-Li Gao 1, 2, 3, 4, 5 , Bin Ding 1, 2, 3, 4, 5 , Qian-Qian Chu 1, 2, 3, 4, 5 , Zhen Li 1, 2, 3, 4, 5 , Guan-Jun Yang 1, 2, 3, 4, 5
Affiliation
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A key challenge in the eco-friendly optoelectronic materials field is to find highly stable and nontoxic perovskite materials. Here, we report the optoelectronic properties and stability of the (C6H5NH3)BiI4 perovskite material. Using an eco-friendly gas pump treatment technique, a dense and pinhole-free (C6H5NH3)BiI4 film was fabricated. Remarkably, a large-area (>20 cm2) Bi-based perovskite film was obtained, which is the largest Bi-based perovskite film ever reported. Besides, the (C6H5NH3)BiI4 perovskite exhibits good solubility in ethanol, which is a safe and eco-friendly solvent. Thermogravimetric analysis results show the beginning of weight loss at ∼184 °C, suggesting excellent heat stability of this material. Most importantly, the (C6H5NH3)BiI4 material can tolerate continuous moisture exposure for 334 days in ambient air owing to the presence of a hydrophobic organic chain. To the best of our knowledge, this is the longest moisture stability reported for lead-free perovskite materials so far. This work paves the way for realizing highly stable and nontoxic perovskite materials for potential optoelectronic applications.
中文翻译：
（C 6 H 5 NH 3）BiI 4：无铅钙钛矿，具有超过330天的湿度稳定性，适用于光电应用†
环保型光电材料领域的关键挑战是找到高度稳定且无毒的钙钛矿材料。在这里，我们报告（C 6 H 5 NH 3）BiI 4钙钛矿材料的光电性能和稳定性。使用环保的气泵处理技术，制备了致密且无针孔的（C 6 H 5 NH 3）BiI 4膜。值得注意的是，获得了大面积（> 20 cm 2）Bi基钙钛矿膜，这是有史以来最大的Bi基钙钛矿膜。此外，（C 6 H 5 NH 3）BiI 4钙钛矿在乙醇中显示出良好的溶解性，乙醇是一种安全，环保的溶剂。热重分析结果表明在约184°C时开始失重，表明该材料具有出色的热稳定性。最重要的是，由于存在疏水性有机链，（C 6 H 5 NH 3）BiI 4材料可以在环境空气中连续暴露334天。据我们所知，这是迄今为止无铅钙钛矿材料中最长的水分稳定性。这项工作为实现潜在光电应用中高度稳定且无毒的钙钛矿材料铺平了道路。
更新日期：2019-05-10
中文翻译：
（C 6 H 5 NH 3）BiI 4：无铅钙钛矿，具有超过330天的湿度稳定性，适用于光电应用†
环保型光电材料领域的关键挑战是找到高度稳定且无毒的钙钛矿材料。在这里，我们报告（C 6 H 5 NH 3）BiI 4钙钛矿材料的光电性能和稳定性。使用环保的气泵处理技术，制备了致密且无针孔的（C 6 H 5 NH 3）BiI 4膜。值得注意的是，获得了大面积（> 20 cm 2）Bi基钙钛矿膜，这是有史以来最大的Bi基钙钛矿膜。此外，（C 6 H 5 NH 3）BiI 4钙钛矿在乙醇中显示出良好的溶解性，乙醇是一种安全，环保的溶剂。热重分析结果表明在约184°C时开始失重，表明该材料具有出色的热稳定性。最重要的是，由于存在疏水性有机链，（C 6 H 5 NH 3）BiI 4材料可以在环境空气中连续暴露334天。据我们所知，这是迄今为止无铅钙钛矿材料中最长的水分稳定性。这项工作为实现潜在光电应用中高度稳定且无毒的钙钛矿材料铺平了道路。
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