深层陷与矿太阳能电池效率之间的相互作用的计算分析
Kara Kearney1,2, Gabseok Seo2,3, Toshinori Matsushima2,3,4
1Department of Mechanical Science and Engineering , University of Illinois , 1204 West Green Street , Urbana , Illinois 61801 , United States.
Journal of the American Chemical Society
|October 30, 2018
概括
通过改变深层陷分布,对酸甲基 (MAPbI3) 太阳能电池的新沉积方法影响效率. 两步处理将陷集中在接口上,与单步方法相比,提高功率转换效率.
科学领域:
- 材料科学
- 可再生能源
- 固态物理
背景情况:
- 化矿太阳能电池提供高功率转换效率.
- 甲基酸 (MAPbI) 是一个关键的矿材料.
- 在MAPbI3中的深层陷通过促进电荷载体重组来限制太阳能电池的性能.
研究的目的:
- 研究沉积方法对MAPbI3太阳能电池中深层陷的空间分布的影响.
- 阐明陷分布与太阳能电池效率之间的关系.
- 了解一阶段和两阶段加工方法之间的效率差异的起源.
主要方法:
- 有限元漂移-扩散模型模拟光激发的电荷载体路径.
- 一步和两步处理的MAPbI3太阳能电池的分析.
- 矿膜的组成和结构分析.
主要成果:
- 一步处理的结果是深层陷分布在整个散装MAPbI3膜中.
- 两步处理导致在MAPbI3/mesoporous TiO2接口的深层陷的聚集.
- 太阳能电池效率的显著差异 (13.5%的单阶段与17.7%的双阶段) 与陷分布相关.
结论:
- 深层陷的空间分布严重依赖于矿沉积方法.
- 两个阶段处理的细胞中的界面局部陷对效率的损害较小,而不是单阶段处理的细胞中的散发陷.
- 了解和控制陷分布对于优化矿太阳能电池性能至关重要.
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