Understanding and Tailoring Grain Growth of Lead-Halide Perovskite for Solar Cell Application,ACS Applied Materials & Interfaces

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Understanding and Tailoring Grain Growth of Lead-Halide Perovskite for Solar Cell Application
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-09-20 00:00:00 , DOI: 10.1021/acsami.7b10022
Yongchao Ma _{1,

2} , Yanliang Liu _{1,

2} , Insoo Shin _{1,

2} , In-Wook Hwang ₃ , Yun Kyung Jung ₄ , Jung Hyun Jeong ₁ , Sung Heum Park _{1,

2} , Kwang Ho Kim ₂

Affiliation

The fundamental mechanism of grain growth evolution in the fabrication process from the precursor phase to the perovskite phase is not fully understood despite its importance in achieving high-quality grains in organic–inorganic hybrid perovskites, which are strongly affected by processing parameters. In this work, we investigate the fundamental conversion mechanism from the precursor phase of perovskite to the complete perovskite phase and how the intermediate phase promotes growth of the perovskite grains during the fabrication process. By monitoring the morphological evolution of the perovskite during the film fabrication process, we observed a clear rod-shaped intermediate phase in the highly crystalline perovskite and investigated the role of the nanorod intermediate phase on the growth of the grains of the perovskite film. Furthermore, on the basis of these findings, we developed a simple and effective method to tailor grain properties including the crystallinity, size, and number of grain boundaries, and then utilized the film with the tailored grains to develop perovskite solar cells.

中文翻译：

理解和定制用于太阳能电池的卤化钙钛矿的晶粒生长

尽管从制造参数到加工参数强烈影响有机-无机杂化钙钛矿中获得高质量晶粒的重要性，但尚未完全了解从前体相到钙钛矿相的制造过程中晶粒生长演变的基本机理。在这项工作中，我们研究了从钙钛矿前体相到完整钙钛矿相的基本转化机理，以及中间相如何在制造过程中促进钙钛矿晶粒的生长。通过监测膜制造过程中钙钛矿的形态演变，我们观察到了高度结晶的钙钛矿中的透明棒状中间相，并研究了纳米棒中间相对钙钛矿膜晶粒生长的作用。此外，

更新日期：2017-09-20

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