用于高性能光伏的层间空间的二维矿的动态转化
Yalan Zhang1, Peijun Wang1, Ming-Chun Tang2
1Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering , Shaanxi Normal University , Xi'an 710119 , China.
Journal of the American Chemical Society
|January 17, 2019
概括
这项研究揭示了交替阴离子 (ACI) 2D矿膜如何结晶,确定了改善太阳能电池性能的关键中间阶段. 这些见解导致矿太阳能电池的效率达到创纪录的14.7%,并提高了稳定性.
科学领域:
- 材料科学
- 固态化学
- 太阳能发电
背景情况:
- 与Ruddlesden-Popper结构相比,二维 (2D) 矿具有交替 (ACI) 的独特特性.
- 了解ACI二维矿在薄膜中的结晶对于优化光电子特性和设备性能至关重要.
- 目前关于薄膜固化过程及其对光伏应用的影响存在知识缺口.
研究的目的:
- 研究ACI2D矿薄膜的现场固化过程.
- 将结晶行为与形态,光电子特性和太阳能电池设备性能相关联.
- 阐明中介阶段在ACI矿膜的形成中的作用.
主要方法:
- 在现场放牧发生X射线散射 (GIWAXS) 监测结晶.
- 暂时吸收光谱研究电荷转移.
- 平面太阳能电池设备的制造和特征.
主要成果:
- 固化过程涉及无序的前体,中间阶段 (包括2D GA2PbI4) 和最终的ACI矿.
- 2D GA2PbI4被确定为影响副产品形成和阶段分布的关键中间阶段.
- 在ACI矿膜内不同n相之间证实了内部电荷转移.
结论:
- 使用DMSO:DMF溶剂混合物的优化ACI2D矿薄膜实现了创纪录的14.7%的功率转换效率.
- 与3D MAPbI3矿相比,这些具有显著的长期稳定性.
- 通过中间阶段控制结晶是高性能和稳定的矿太阳能电池的关键.
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