摘要
在铜基金属卤化物Cs_(3)Cu_(2)I_(5)中掺杂Mn^(2+)是拓宽发光范围的重要途径,但是已报道的掺杂方法大多需要高温、惰性气氛、较长时间和专用设备等。本工作将CsI固体粉末直接投加至CuI和MnCl_(2)的氢碘酸溶液中,在较低温度(60℃)、空气条件下快速(3 min)合成Mn^(2+)掺杂Cs_(3)Cu_(2)I_(5)微晶,并测试了其结构和发光性能。通过系列对比实验,提出一种由反应物溶解度控制的“缓释生长-掺杂”机制,证实CsI固体粉末在高浓度氢碘酸中的缓慢溶解能够降低Cs_(3)Cu_(2)I_(5)晶体的生长速率,为Mn^(2+)的低温、可控掺杂提供有利的动力学条件。该方法为全无机金属卤化物体系的掺杂发光和掺杂动力学研究提供了新的思路。
Doping Mn2+into the copper-based halide Cs3Cu2I5 is an important approach to broaden the lumines⁃cence performance.However,most of the reported doping methods require high temperature,inert atmosphere,long reaction time,and specialized equipment.In this work,by directly adding CsI powders into a hydroiodic acid solu⁃tion of CuI and MnCl2,Mn2+-doped Cs3Cu2I5 microcrystals were rapidly synthesized at a relatively low temperature(60℃)under ambient air conditions within 3 minutes.Through a series of control experiments,we propose a“slowrelease growth-doping”mechanism controlled by the solubility of the reactants.It is confirmed that the slow dissolu⁃tion rate of CsI powders in a concentrated hydroiodic acid can reduce the growth rate of Cs3Cu2I5 crystals,providing favorable kinetic conditions for controllable Mn2+doping.This work provides a new approach for the study of doping luminescence and doping kinetics in all-inorganic metal halide systems.
作者
严鑫鑫
胡扬香
万凝
庞起
陈旖勃
YAN Xinxin;HU Yangxiang;WAN Ning;PANG Qi;CHEN Yibo(School of Chemistry and Chemical Engineering/State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi University,Nanning 530004,China;School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials,Guangzhou University,Guangzhou 510006,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2024年第3期375-382,共8页
Chinese Journal of Luminescence
基金
国家自然科学基金(21965003,22365005)
广州市科技计划项目(2023A03J0076)~~。
