Color-tunable electroluminescence from Eudoped TiO2/p+-Si heterostructured devices: engineering of energy transfer

被引：12
|
作者：
Zhu, Chen [1 ,2 ]
Lv, Chunyan [1 ,2 ,3 ]
Wang, Canxing [1 ,2 ]
Sha, Yiping [1 ,2 ]
Li, Dongsheng [1 ,2 ]
Ma, Xiangyang [1 ,2 ]
Yang, Deren [1 ,2 ]
机构：
[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
[3] Huzhou Univ, Dept Chem, Huzhou 313000, Zhejiang, Peoples R China
来源：
OPTICS EXPRESS | 2015年 / 23卷 / 03期
基金：
中国国家自然科学基金;
关键词：
DOPED ZNO NANOCRYSTALS; PHOTOLUMINESCENCE PROPERTIES; TIO2; NANOCRYSTALS; LUMINESCENCE; EMISSION; ION;
D O I：
10.1364/OE.23.002819
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report on color-tunable electroluminescence (EL) from TiO2:Eu/p(+)-Si heterostructured devices using different TiO2:Eu films in terms of Eu content and annealing temperature. It is found that the Eu-related emissions are activated by the energy transferred from TiO2 host via oxygen vacancies, at the price of weakened oxygen-vacancy-related emissions. Both the higher Eu content and the higher annealing temperature for TiO2:Eu films facilitate the aforementioned energy transfer. In this context, the dominant EL from the TiO2:Eu/p(+)-Si heterostructured devices can be transformed from oxygen-vacancy-related emissions into Eu-related emissions with increasing Eu-content and annealing temperature for TiO2: Eu films, exhibiting different colors of emanated light. We believe that this work sheds light on developing silicon-based red emitters using the Eu-doped oxide semiconductor films. (C) 2015 Optical Society of America
引用
收藏
页码：2819 / 2826
页数：8
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