Si 6− z Al z O z N 8− z ( β -SiAlON):Eu 2+ is among the most suitable green phosphors for white LEDs. To further improve the performance of this phosphor, it is important to investigate the properties of the nitride host crystal, β -SiAlON, which is considered to contain nitrogen vacancy defects (V N ) to some extent. From time-resolved fluorescence (TR-F) measurements of β -SiAlON without luminescent activators, we observed blue, yellow, and ultraviolet emissions. We focused on the blue emission typically centered at 460 nm, which was quenched at room temperature, but showed a continued afterglow for several milliseconds. The electron spin resonance signal of Si dangling bonds due to V N in β -SiAlON was observed to have a high concentration of 5.8 × 10 16 g −1 . We have previously reported the blue emission in nitride phosphor CaAlSiN

中文翻译：

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β-SiAlON结晶粉中的缺陷引起的发光和余辉

Si 6-z Al z O z N 8-z（β-SiAlON）：Eu 2+是最适合白色LED的绿色磷光体。为了进一步改善这种磷光体的性能，重要的是研究氮化物基质晶体β-SiAlON的性能，该晶体被认为在一定程度上含有氮空位缺陷（VN）。通过不使用发光活化剂的β-SiAlON的时间分辨荧光（TR-F）测量，我们观察到了蓝色，黄色和紫外线发射。我们着眼于通常在460 nm处居中的蓝色发射，该发射在室温下被淬灭，但显示出持续的余辉达数毫秒。观察到β-SiAlON中的由VN引起的Si悬空键的电子自旋共振信号具有5.8×10 16 g -1的高浓度。先前我们已经报道了氮化物荧光粉CaAlSiN中的蓝色发射