聊城大学学报（自然科学版）2024，Vol.37Issue(2)：34-41,8.DOI:10.19728/j.issn1672-6634.2023070005
Cr掺杂Ca2Ga2GeO7宽带近红外光材料的制备及性能研究
Preparation and Photoluminescence Properties of Cr-Doped Ca2Ga2GeO7 Broadband Near-Infrared Materials
摘要
Abstract
A series of Cr-doped Ca2Ga2GeO7 near-infrared luminescence materials with different doping concentrations were prepared by high-temperature solid-state method.The structures,morphologies and luminescence properties of the materials were investigated in detail by using the techniques of X-ray dif-fraction combined Rietveld refinement,transmission electron microscopy,scanning electron microscopy,photoluminescence emission and excitation spectra,Raman spectra,diffuse reflectance spectra and time-resolved fluorescence spectra.The experimental results showed that Cr was doped into the Ca2Ga2GeO7 lattice and existed in the form of mixed valence of Cr3+and Cr4+.Under the excitation of 460 nm,the samples exhibited broadband near-infrared emission,covering NIR Ⅰ and NIR Ⅱ region and possessing good luminescence thermal stability.Ca2Ga2GeO7:Cr showed good luminescence thermal stability,which is po-tentially valuable for the application in the field of near-infrared light source for the conversion of blue light LEDs.关键词
宽带近红外/发光材料/锗酸盐/Cr3+/Cr4+Key words
broadband near-infrared/luminescence materials/Germanates/Cr3+/Cr4+分类
数理科学引用本文复制引用
黄帅,颜雨,尚蒙蒙..Cr掺杂Ca2Ga2GeO7宽带近红外光材料的制备及性能研究[J].聊城大学学报（自然科学版）,2024,37(2):34-41,8.基金项目
国家自然科学基金项目(52072349 （）
12374376) （）
山东省重大基础研究项目(ZR2021ZD10)资助 （ZR2021ZD10）
