Precursor Solution Annealing Forms Cubic‐Phase Perovskite and Improves Humidity Resistance of Solar Cells,Advanced Functional Materials

当前位置： X-MOL 学术 › Adv. Funct. 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.)

Precursor Solution Annealing Forms Cubic‐Phase Perovskite and Improves Humidity Resistance of Solar Cells
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2018-07-13 , DOI: 10.1002/adfm.201801508
Petr P. Khlyabich ₁ , J. Clay Hamill ₁ , Yueh-Lin Loo _{1,

2}

Affiliation

Solar cells with light‐absorbing layers comprising organometal halide perovskites have recently exceeded 22% efficiency. Despite high power‐conversion efficiencies, the stability of these devices, particularly when exposed to humidity and oxygen, remains poor. In the current study, a pathway to increase the stability of methylammonium lead iodide (CH₃NH₃PbI₃) based solar cells towards humidity is demonstrated, while maintaining the simplicity and solution‐processability of the active layers. Thermal annealing of the precursor solution prior to deposition induces the formation of cubic‐phase perovskite films in the solid state at room temperature. The experiments demonstrate that this improved ambient stability is correlated with the presence of the cubic phase at device operating temperatures, with the cubic phase resisting the formation of perovskite monohydrate—a pathway of degradation in conventionally processed perovskite thin films—on exposure to humidity.

中文翻译：

前体溶液退火形成立方相钙钛矿并提高太阳能电池的耐湿性

最近，具有包含有机金属卤化物钙钛矿的光吸收层的太阳能电池的效率已超过22％。尽管功率转换效率很高，但这些设备的稳定性（尤其是在暴露于湿气和氧气的情况下）仍然很差。在当前的研究中，增加甲基铵碘化铅（CH ₃ NH ₃ PbI ₃展示了基于太阳能电池的耐湿性，同时保持了有源层的简单性和溶液加工性。在沉积前对前体溶液进行热退火会诱导在室温下以固态形式形成立方相钙钛矿薄膜。实验表明，这种改善的环境稳定性与器件工作温度下立方相的存在有关，该立方相可抵抗钙钛矿一水合物的形成（一经常规加工的钙钛矿薄膜降解的途径），即暴露于湿气中。

更新日期：2018-07-13

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11