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

被引：13

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

页码：2819 / 2826

页数：8

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