光电效应
材料科学
X射线光电子能谱
光电探测器
光致发光
Crystal(编程语言)
单晶
光电子学
激发
光谱学
外延
光学
结晶学
纳米技术
化学
图层(电子)
核磁共振
物理
量子力学
计算机科学
程序设计语言
作者
Xin Qiu,Yukun Wang,Min Li,Lixiang Huang,Jia Yang,Guoxin Li,Xiaoxiao Zhang,Kai Xiao,Wenhong Sun
标识
DOI:10.1016/j.ceramint.2022.09.019
摘要
Single crystal (SC) MAPbBr3 and MAPbCl3 perovskite are considered promising materials for fabricating high-performance photodetectors (PDs) due to their impressive optoelectronic properties and good chemical stability. Structural modification of PDs is the fundamental solution to improve performance. In this paper, we designed a simple structure diagram considering photoelectric properties and the possibility of epitaxial crystal growth. Then a solution height restriction method (SHR) was used to grow the crystal and make the internal secondary excitation feasible. X-ray rocking curves (XRC) of MAPbBr3-SHR SCs show the quality of crystal under this growth method is excellent. X-ray photoelectron spectroscopy (XPS) measurements and Energy-dispersive X-ray spectroscopy (EDS) indicate element diffusion exists in the interface. Photoluminescence spectra (PL) and the photoelectric performance test have proved the existence and validity of the internal secondary excitation of crystals. Based on the above analysis, it was demonstrated that the inner MAPbCl3 single-crystal enhances the optoelectronic performance of MAPbCl3-MAPbBr3 crystals by the internal secondary excitation effect.
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