通过设计具有高对称性尖晶石结构的 SrZnGeO:Mn 荧光粉实现强绿光发射。

Intense green light emission in Sr ZnGe O :Mn phosphors by the design of high symmetry melilite structure.

机构信息

School of Materials and Science and Engineering, Shanghai Institute of Technology, Shanghai, China.

National Experimental Teaching Demonstration Center for Materials Science and Engineering, Donghua University, Shanghai, China.

出版信息

Luminescence. 2024 Jan;39(1):e4555. doi: 10.1002/bio.4555. Epub 2023 Aug 6.

DOI:10.1002/bio.4555

PMID:37461122

Abstract

A green phosphor Sr ZnGe O :Mn with a melilite structure was prepared using a high-temperature solid-state reaction. When the 535 nm emission was monitored, the excitation spectrum of the Sr ZnGe O :Mn was found to contain two excitation bands in the ultraviolet (UV) region. When excited by UV light, the sample shows bright green emission at 535 nm, which corresponds to the distinctive transition of Mn ( T → A ). Moreover, the quantum efficiency of Sr ZnGe O :Mn could reach 67.6%. Finally, a high-performance white-light-emitting diode (WLED) with a low correlated colour temperature of 4632 K and a high colour rendering index (CRI) of 92.3 were packaged by coating commercial blue and red phosphors with an optimized Sr ZnGe O :Mn sample on a 310 nm UV chip. This indicated that Sr ZnGe O :Mn has the potential application as a green component in the WLED lighting field.

摘要

采用高温固相法制备了具有尖晶石结构的绿色荧光粉 SrZnGeO:Mn。当监测到 535nm 发射时，发现 SrZnGeO:Mn 的激发光谱在紫外（UV）区域包含两个激发带。当用紫外光激发时，样品在 535nm 处显示出明亮的绿色发射，这对应于 Mn（T→A）的特征跃迁。此外，SrZnGeO:Mn 的量子效率可达 67.6%。最后，通过在 310nm UV 芯片上涂覆商用蓝色和红色荧光粉，并优化 SrZnGeO:Mn 样品，封装了高性能的白光发光二极管（WLED），其相关色温为 4632K，显色指数（CRI）为 92.3。这表明 SrZnGeO:Mn 有可能作为绿色组件应用于 WLED 照明领域。