光致发光
单斜晶系
材料科学
带隙
光谱学
谱线
发射光谱
分析化学(期刊)
人口
直线(几何图形)
Crystal(编程语言)
结晶学
晶体结构
光电子学
化学
物理
量子力学
色谱法
计算机科学
数学
社会学
人口学
几何学
程序设计语言
天文
作者
Cassandra Remple,Lauren M. Barmore,Jani Jesenovec,John S. McCloy,Matthew McCluskey
出处
期刊:Journal of vacuum science & technology
[American Vacuum Society]
日期:2023-01-27
卷期号:41 (2)
被引量:3
摘要
Alloying β-Ga2O3 with Al2O3 to create (AlxGa1−x)2O3 enables ultra-wide bandgap materials suitable for applications deep into ultraviolet. In this work, photoluminescence (PL) spectra of Cr3+ were investigated in monoclinic single crystal β-Ga2O3, and 10 mol. % Al2O3 alloyed with β-Ga2O3, denoted β-(Al0.1Ga0.9)2O3 or AGO. Temperature-dependent PL properties were studied for Cr3+ in AGO and β-Ga2O3 from 295 to 16 K. For both materials at room temperature, the red-line emission doublet R1 and R2 occurs at 696 nm (1.78 eV) and 690 nm (1.80 eV), respectively, along with a broad emission band at 709 nm (1.75 eV). The linewidths for AGO are larger for all temperatures due to alloy broadening. For both materials, the R-lines blue-shift with decreasing temperature. The (lowest energy) R1 line is dominant at low temperatures due to the thermal population of the levels. For temperatures above ∼50 K, however, the ratio of R2 to R1 peak areas is dominated by nonradiative combination.
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