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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

太阳能电池. 太阳能电池. 太阳能电池. 太阳能电池. 微观结构对矿太阳能电池局部载体寿命的影响

Dane W deQuilettes¹, Sarah M Vorpahl¹, Samuel D Stranks²

¹Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700, USA.

Science (New York, N.Y.)

|May 2, 2015

概括

混合矿薄膜中的粒度边界显著影响性能,显示较暗和更快的衰变. 化学处理可以增强以前非发光的颗粒,改善光伏潜力.

科学领域:

材料科学材料科学材料科学
太阳能光伏发电是如何实现的
光电学是指光电子产品.

背景情况:

混合矿光伏由于运载体寿命长和光发光 (PL) 效率高,具有高性能.
高质量的矿膜通常与较慢的PL衰变时间有关.
谷物边界对矿太阳能电池性能的影响被认为是可以忽略不计的.

研究的目的:

为了空间分辨光发光 (PL) 衰变动力学在非固态度有机-无机矿膜 (CH3NH3PbI3(Cl)).
为了研究粒度边界和度对PL性质的作用.
探索改善表现不佳的矿颗粒性能的方法.

主要方法:

使用与扫描电子显微镜 (SEM) 相关联的共聚焦光显微镜.
在单个粒度和粒度边界之间空间解析了PL衰变动态.
能量分散式X射线光谱 (EDX) 分析了元素组成,特别是度.

主要成果:

在同一薄膜内的不同颗粒之间观察到PL强度和寿命的显著变化.
与谷物内部相比,谷物边界表现出较低的PL强度和更快的非辐射衰变.
在较高的度和更明亮的PL区域之间发现了正相关性.
用皮里丁进行化学处理成功激活了以前非发光 (暗) 颗粒.

结论:

与以前的假设相反,CH3NH3PbI3(Cl) 薄膜中的粒度边界是非辐射重组的活性场所.
的加入对于提高矿膜中的PL效率至关重要.
后处理策略,比如化的应用,可以使缺陷被动化,并改善暗粒的性能,为增强的光伏设备提供了一条途径.

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