Exploring the Limits: Degradation Behavior of Lead Halide Perovskite Films under Exposure to Ultrahigh Doses of γ Rays of Up to 10 MGy

被引：12

作者：

Ozerova, Victoria V. ^{[1
]}

Emelianov, Nikita A. ^{[1
]}

Kiryukhin, Dmitry P. ^{[1
]}

Kushch, Pavel P. ^{[1
]}

Shilov, Gennady, V ^{[1
]}

Kichigina, Galina A. ^{[1
]}

Aldoshin, Sergey M. ^{[1
]}

Frolova, Lyubov A. ^{[1
]}

Troshin, Pavel A. ^{[1
]}

机构：

[1] Russian Acad Sci FRC PCP MC RAS, Fed Res Ctr Problems Chem Phys & Med Chem, Chernogolovka 142432, Moscow Region, Russia

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2023年 / 14卷 / 03期

基金：

俄罗斯科学基金会;

关键词：

Degradation behavior - Grain-boundaries - Halide perovskites - Metallic leads - Near field optical microscopy - Organic cations - Perovskite films - Radiation hardness - Radiation-induced - Thin-films;

D O I：

10.1021/acs.jpclett.2c03763

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Herein, we show that thin films of MAPbI(3), FAPbI(3), (CsMA)PbI3, and (CsMAFA)PbI3, where MA and FA are methylammonium and formamidinium cations, respectively, tolerate ultrahigh doses of gamma rays approaching 10 MGy without significant changes in their absorption spectra. However, among the studied materials, FAPbI(3) was the only one that did not form metallic lead due to its extreme radiation hardness. Infrared near -field optical microscopy revealed the radiation-induced depletion of organic cations from the grains of MAPbI(3) and their accumulation at the grain boundaries, whereas FAPbI(3) on the contrary lost FA cations from the grain boundaries. The multication (CsMAFA)PbI3 perovskite underwent a facile phase segregation to domains enriched with MA and FA cations, which is a principally new radiation-induced degradation pathway. Our findings suggest that the radiation hardness of the rationally designed perovskite semiconductors could go far beyond the impressive threshold of 10 MGy we set herein for FAPbI(3) films, which opens many exciting opportunities for practical implementation of these materials.

引用

页码：743 / 749

页数：7