Efficient upconversion luminescence from Ba5Gd8Zn4O21:Yb3+, Er3+ based on a demonstrated cross-relaxation process

被引：86

作者：

Mi, Chao ^{[1
]}

Wu, Jianhong ^{[1
]}

Yang, Yanmin ^{[1
]}

Han, Boning ^{[1
]}

Wei, Jun ^{[1
]}

机构：

[1] Hebei Univ, Midwest Univ Comprehens Strength Promot Project, Hebei Key Lab Opt Elect Informat & Mat, Coll Phys Sci & Technol, Baoding 071002, Peoples R China

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

美国国家科学基金会;

关键词：

PHOTON AVALANCHE; POWER DEPENDENCE; FLUORESCENCE; LANTHANIDE; EMISSION;

D O I：

10.1038/srep22545

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Under 971 nm excitation, bright green and red emissions from Yb3+/Er3+ co-doped Ba5Gd8Zn4O21 phosphor can be observed, especially the intense red emission in highly doped samples. The experimental results indicate that Ba5Gd8Zn4O21:Yb3+, Er3+ emits stronger upconversion luminescence than NaYF4:Yb3+, Er3+ under a low excitation power, and a maximum upconversion power efficiency of 2.7% for Ba5Gd8Zn4O21:Yb3+, Er3+ was achieved. More significantly, to explain the red emission enhanced with the dopant concentration, this paper presents a possible cross-relaxation process and demonstrates it based on the rate equation description and temporal evolution. In view of the strong upconversion luminescence, colour tunable ability and stable chemical nature, Yb3+/Er3+ co-doped Ba5Gd8Zn4O21 phosphor could be an excellent candidate for efficient upconversion luminescence generation.

引用

页数：11

共 32 条

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