人工晶体学报2025，Vol.54Issue(7)：1265-1271,7.DOI:10.16553/j.cnki.issn1000-985x.2025.0064
CsPbBr3钙钛矿量子点闪烁体的X射线辐照稳定性
X-Ray Radiation Stability of CsPbBr3 Perovskite Quantum Dot Scintillators
摘要
Abstract
Scintillators maintaining prolonged luminescence stability under high-dose irradiation is important for industrial nondestructive testing applications.Consequently,precisely evaluate the irradiation stability carries substantial engineering significance in both predicting scintillator lifespan and deciphering performance degradation mechanisms.CsPbBr3 perovskite quantum dot(QD)scintillators have garnered significant attentions due to their outstanding properties,including high radiation hardness,strong X-ray stopping power,nanosecond-scale emission time,low-temperature synthesis,and large-area and flexible manufacturing.Here,CsPbBr3 QD scintillators are fabricated via a solid-phase thermoforming technique.The QDs are uniformly dispersed within a polymer matrix observed by the morphology characterization.When QD weight fraction is 2％,the scintillator exhibits a transparent bright green appearance with an X-ray absorption efficiency of 6％.When the weight fraction increases to 20％,the scintillator turns opaque and bright yellow,with the X-ray absorption efficiency rising to 54％.Moreover,under an X-ray irradiation dose of 10 kGy based on the actual X-ray absorption,the CsPbBr3 QD scintillator maintains unchanged radioluminescence(RL)spectra.This excellent irradiation stability results from that the shallow defect states introduced by displacement damage and the parasitic electric fields generated by ionization damage have minimal impacts on the radiative recombination luminescence of CsPbBr3 QDs.This work highlights the potential application of CsPbBr3 QD scintillators in the long-term X-ray detection.关键词
CsPbBr3/钙钛矿量子点/闪烁体/X射线/辐照稳定性Key words
CsPbBr3/perovskite quantum dot/scintillator/X-ray/irradiation stability分类
能源科技引用本文复制引用
杨智,顾林园,王大伟,徐旭辉,宋继中..CsPbBr3钙钛矿量子点闪烁体的X射线辐照稳定性[J].人工晶体学报,2025,54(7):1265-1271,7.基金项目
国家自然科学基金(52272166) （52272166）
河南省自然科学基金(232300421214,242300421217) （232300421214,242300421217）
