Electrochemistry and Spectroelectrochemistry of Lead Halide Perovskite Films: Materials Science Aspects and Boundary Conditions.,Chemistry of Materials

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Electrochemistry and Spectroelectrochemistry of Lead Halide Perovskite Films: Materials Science Aspects and Boundary Conditions.
Chemistry of Materials ( IF 7.2 ) Pub Date : 2017-12-05 , DOI: 10.1021/acs.chemmater.7b04321
Gergely F Samu _{1,

2} , Rebecca A Scheidt _{1,

3} , Prashant V Kamat _{1,

3} , Csaba Janáky _{2,

4}

Affiliation

The unique optoelectronic properties of lead halide perovskites have triggered a new wave of excitement in materials chemistry during the past five years. Electrochemistry, spectroelectrochemistry, and photoelectrochemistry could be viable tools both for analyzing the optoelectronic features of these materials and for assembling them into hybrid architectures (e.g., solar cells). At the same time, the instability of these materials limits the pool of solvents and electrolytes that can be employed in such experiments. The focus of our study is to establish a stability window for electrochemical tests for all-inorganic CsPbBr3 and hybrid organic-inorganic MAPbI3 perovskites. In addition, we aimed to understand the reduction and oxidation events that occur and to assess the damage done during these processes at extreme electrochemical conditions. In this vein, we demonstrated the chemical, structural, and morphological changes of the films in both reductive and oxidative environments. Taking all these results together as a whole, we propose a set of boundary conditions and protocols for how electrochemical experiments with lead halide perovskites should be carried out and interpreted. The presented results will contribute to the understanding of the electrochemical response of these materials and lead to a standardization of results in the literature so that comparisons can more easily be made.

中文翻译：

卤化钙钛矿铅薄膜的电化学和光谱电化学：材料科学方面和边界条件。

在过去的五年中，卤化钙钛矿的独特光电性能引发了材料化学领域的新一波热潮。电化学，光谱电化学和光电化学可能是分析这些材料的光电特性并将其组装成混合架构（例如太阳能电池）的可行工具。同时，这些材料的不稳定性限制了可用于此类实验的溶剂和电解质的总量。我们研究的重点是建立用于全无机CsPbBr3和杂化有机-无机MAPbI3钙钛矿的电化学测试的稳定性窗口。此外，我们旨在了解发生的还原和氧化事件，并评估在极端电化学条件下这些过程中所造成的损害。通过这种方式，我们证明了膜在还原和氧化环境中的化学，结构和形态变化。综合所有这些结果，我们提出了一组边界条件和方案，用于进行和解释卤化钙钛矿铅的电化学实验。提出的结果将有助于理解这些材料的电化学响应，并导致文献中结果的标准化，因此可以更轻松地进行比较。我们提出了一组边界条件和协议，说明如何进行和解释卤化钙钛矿铅的电化学实验。提出的结果将有助于理解这些材料的电化学响应，并导致文献中结果的标准化，因此可以更轻松地进行比较。我们提出了一组边界条件和协议，说明如何进行和解释卤化钙钛矿铅的电化学实验。提出的结果将有助于理解这些材料的电化学响应，并导致文献中结果的标准化，因此可以更轻松地进行比较。

更新日期：2017-12-15

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