黄铁矿
荧光粉
分析化学(期刊)
激发态
色温
激发
紫外线
化学
材料科学
物理
原子物理学
光电子学
尖晶石
色谱法
量子力学
冶金
作者
Yongzheng Fang,Yuhang Li,Chengze Wang,Wenxiang Yin,Tongna Shi,Ganghua Zhang,Guoying Zhao,Xiaoping Zhou,Jianhua Yang,Dehua Wu,Lina Dong,Jingshan Hou
摘要
Abstract A green phosphor Sr 2 ZnGe 2 O 7 :Mn 2+ 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 2 ZnGe 2 O 7 :Mn 2+ 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 2+ ( 4 T 1 → 6 A 1 ). Moreover, the quantum efficiency of Sr 2 ZnGe 2 O 7 :Mn 2+ 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 2 ZnGe 2 O 7 :Mn 2+ sample on a 310 nm UV chip. This indicated that Sr 2 ZnGe 2 O 7 :Mn 2+ has the potential application as a green component in the WLED lighting field.
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