The size-dependent upconversion luminescence properties of β-NaYF4:Yb3+,Ho3+ microprisms

被引：12

作者：

Chen, Yongsheng ^{[1
]}

Hao, Xiuli ^{[1
]}

Zhou, Jianpeng ^{[1
]}

Jiao, Yuechao ^{[1
]}

He, Wei ^{[1
]}

Wang, Honghong ^{[1
]}

Lu, Jingxiao ^{[1
]}

Yang, Shi-e ^{[1
]}

机构：

[1] Zhengzhou Univ, Dept Phys, Key Lab Mat Phys, Zhengzhou 450052, Peoples R China

来源：

MATERIALS LETTERS | 2012年 / 83卷

基金：

中国国家自然科学基金;

关键词：

Optical materials and properties; Upconversion; A-Si/a-Si tandem solar cell; Nanocomposites; SOLAR-CELLS; NANOCRYSTALS; SILICON;

D O I：

10.1016/j.matlet.2012.05.122

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

beta-NaYF4:Yb3+(25%),Ho3+(1%) microprisms with different grain sizes were synthesized by a hydrothermal method. The structure, composition and upconversion emission properties of the products were characterized by scanning electron microscopy, x-ray diffractometer, inductively coupled plasma atomic emission spectrometry and spectrophotometer. It is found that with the decrease of NaF/NH4HF2 ratios in solution, the lengths of the beta-NaYF4:Yb3+(25%),Ho3+(1%) microprisms increase from similar to 5 to similar to 15 mu m. The enhancements in the UC emissions with the increase of grain sizes resulted from the raise of the Yb3+ concentrations in crystals. Applying these materials at the back of a-Si single junction and a-Si/a-Si tandem solar cells, currents of 2.34 and 1.02 mu A are obtained under 60 mW (80 mW/cm(2)) 980 nm laser excitation, respectively. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：49 / 51

页数：3

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