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首页> 外文期刊>Nanotechnology >Blue, green, and red emission from undoped and doped ZnGa2O4 colloidal nanocrystals
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Blue, green, and red emission from undoped and doped ZnGa2O4 colloidal nanocrystals

机译：未掺杂和掺杂的ZnGa2O4胶态纳米晶体的蓝色，绿色和红色发射

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摘要

Undoped, Tb3+- and Eu3+-doped ZnGa2O4 colloidal nanocrystals were synthesized by a nonhydrolytic hot solution chemistry. Undoped nanocrystals exhibited an intrinsic blue emission peaking at 437 nm by self-activated transition. The emissions of Tb3+- and Eu3+-doped ZnGa2O4 nanocrystals consisted of their own characteristic green and red line peaks (D-5(4)-F-7(j) transitions), respectively. Synthetic parameters such as activator concentration and reaction time were varied to investigate their effects on luminescent properties. Tb3+-doped colloidal nanocrystals synthesized for a short reaction time showed an unprecedented, exclusively green luminescence with the host blue emission effectively suppressed. On the other hand, the emission of Eu3+-doped ones was weak with the host emission persistently present regardless of reaction time.
机译：通过非水解热溶液化学合成了未掺杂，Tb3 +和Eu3 +掺杂的ZnGa2O4胶体纳米晶体。未掺杂的纳米晶体通过自激活跃迁在437 nm处显示出固有的蓝色发射峰。掺Tb3 +和Eu3 +的ZnGa2O4纳米晶体的发射分别由其自己的特征性绿线和红线峰（D-5（4）-F-7（j）跃迁）组成。改变诸如活化剂浓度和反应时间之类的合成参数以研究其对发光性能的影响。短时间内合成的掺有Tb3 +的胶体纳米晶体显示出空前的，仅绿色的发光，有效抑制了主体的蓝色发光。另一方面，Eu 3+掺杂的发光较弱，而与反应时间无关地持续存在主体发光。

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