当前位置：
X-MOL 学术
›
Adv. Electron. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Unraveling the Light‐Induced Degradation Mechanisms of CH3NH3PbI3 Perovskite Films
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2017-11-13 , DOI: 10.1002/aelm.201700158 Norbert H. Nickel 1 , Felix Lang 1 , Victor V. Brus 1 , Oleksandra Shargaieva 1 , Jörg Rappich 1
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2017-11-13 , DOI: 10.1002/aelm.201700158 Norbert H. Nickel 1 , Felix Lang 1 , Victor V. Brus 1 , Oleksandra Shargaieva 1 , Jörg Rappich 1
Affiliation
|
Organic–inorganic perovskite solar cells have experienced a remarkable development. In a short period of time power conversion efficiencies have jumped to values of more than 22%. However, the stability of these devices is an important subject. The stability of CH3NH3PbI3 perovskite films is investigated using visible and ultraviolet light in oxygen atmosphere and in vacuum. Illumination in O2 atmosphere results in a swift degradation. Oxygen acts as a catalyst decomposing methylammonium ions (CH3NH3+) into CH3NH2 and hydrogen. In vacuum, another degradation mechanism is observed. Prolonged illumination of the samples with photons from blue and UV light‐emitting diodes also results in dissociation of the methylammonium ion into CH3NH2 and hydrogen. In both cases the resulting molecules are highly mobile at room temperature and diffuse out of the samples. The light‐induced dissociation of CH3NH3+ is accompanied by the generation of localized defects in the band gap of the perovskite. Furthermore, the experimental data clearly show that the molecular orbitals of CH3NH3+ are not in resonance with the energy bands of the perovskite lattice.
中文翻译：
阐明CH3NH3PbI3钙钛矿薄膜的光诱导降解机理
有机-无机钙钛矿太阳能电池取得了显着发展。在短时间内，功率转换效率已跃升至超过22％的值。但是，这些设备的稳定性是重要的课题。使用可见光和紫外光在氧气气氛和真空中研究CH 3 NH 3 PbI 3钙钛矿薄膜的稳定性。O 2气氛中的照明导致迅速降解。氧气充当将甲基铵离子（CH 3 NH 3 +）分解为CH 3 NH 2的催化剂和氢。在真空中，观察到另一种降解机理。蓝光和紫外线发光二极管发出的光子长时间照射样品还会导致甲基铵离子解离为CH 3 NH 2和氢。在这两种情况下，所得分子在室温下都具有很高的流动性，并从样品中扩散出来。CH 3 NH 3 +的光致离解伴随钙钛矿带隙中局部缺陷的产生。此外，实验数据清楚地表明，CH 3 NH 3 +的分子轨道不与钙钛矿晶格的能带共振。
更新日期：2017-11-13
中文翻译：
阐明CH3NH3PbI3钙钛矿薄膜的光诱导降解机理
有机-无机钙钛矿太阳能电池取得了显着发展。在短时间内，功率转换效率已跃升至超过22％的值。但是，这些设备的稳定性是重要的课题。使用可见光和紫外光在氧气气氛和真空中研究CH 3 NH 3 PbI 3钙钛矿薄膜的稳定性。O 2气氛中的照明导致迅速降解。氧气充当将甲基铵离子（CH 3 NH 3 +）分解为CH 3 NH 2的催化剂和氢。在真空中，观察到另一种降解机理。蓝光和紫外线发光二极管发出的光子长时间照射样品还会导致甲基铵离子解离为CH 3 NH 2和氢。在这两种情况下，所得分子在室温下都具有很高的流动性，并从样品中扩散出来。CH 3 NH 3 +的光致离解伴随钙钛矿带隙中局部缺陷的产生。此外，实验数据清楚地表明，CH 3 NH 3 +的分子轨道不与钙钛矿晶格的能带共振。
京公网安备 11010802027423号