期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 10, 期 14, 页码 3950-3954出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b01193
关键词
-
类别
资金
- MOST [2018YFA0208704, 2016YFA0200602]
- NSFC [21703241, 21725305]
- Youth Innovation Promotion Association CAS [2019188]
Two-dimensional (2D) hybrid perovskites have emerged as promising materials for optoelectronic devices owing to their improved stability. The crystal edges of layered 2D perovskites were found to play an important role in device performance by providing a pathway to dissociate bound excitons into long-lived free charge carriers. However, their formation mechanism and whether they are controllable remain unclear. Herein, we report a photoluminescence (PL) imaging study on layered (BA)(2)(MA)(n-1)PbnI3n+1 (BA = CH3(CH2)(3)NH3+, MA = CH3NH3+) perovskite single crystals before and after treatment with butylammonium iodide (BAI) and methylammonium iodide (MAI) solutions. We find that the crystal edges with exciton dissociation ability are induced by the loss of BA ligands and can be removed by adding additional BA cations and regenerated by BA-to-MA cation exchange. This work presents a simple yet efficient method to develop and control the properties of crystal edges for better applications in 2D perovskite devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据