Abstract

It is shown that the introduction of cellulose ester mixed with acetotrimethyl acetate into films of organometallic perovskite CH₃NH₃PbBr₃ significantly increases their stability while maintaining the optical and photoelectric properties of perovskite. It is found that, upon the introduction of 10–20 wt % mixed cellulose ester in CH₃NH₃PbBr₃, the resistivity of the composite increases by a factor of 5–10 during 60–70 days, whereas in pure perovskite films such changes are observed within 10–15 days. When the films are illuminated with a simulated solar light, the resistance of the samples drops by 2–3 orders of magnitude, and the effect of photosensitivity persists for more than 2 months. The formation of hydrogen bonds between mixed cellulose ester and organometallic perovskite is, in our opinion, the main factor that increases the stability of the composite film in comparison with pure perovskite. The composite films been under study are promising for creating degradation-resistant perovskite solar cells and light-emitting diodes.

中文翻译：

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混合纤维素酯修饰的有机金属钙钛矿CH 3 NH 3 PbBr 3复合膜的光电性能

摘要

结果表明，将纤维素酯与乙酰乙酸三甲酯混合引入有机金属钙钛矿CH ₃ NH ₃ PbBr ₃膜中，可以显着提高其稳定性，同时保持钙钛矿的光学和光电性能。发现在CH ₃ NH ₃ PbBr _3中引入10–20 wt％混合纤维素酯后，复合材料的电阻率在60-70天内增加了5-10倍，而在纯钙钛矿薄膜中则在10-15天内观察到了这种变化。当用模拟太阳光照射胶片时，样品的电阻下降2-3个数量级，并且光敏性的影响持续2个月以上。我们认为，与纯钙钛矿相比，混合纤维素酯和有机金属钙钛矿之间氢键的形成是增加复合膜稳定性的主要因素。研究中的复合膜有望用于制造抗降解的钙钛矿太阳能电池和发光二极管。