Ultraviolet photodetector with high internal gain enhanced by TiO2/SrTiO3 heterojunction

被引：38

作者：

Zhang, Min ^{[1
]}

Zhang, Haifeng ^{[1
]}

Lv, Kaibo ^{[2
]}

Chen, Weiyou ^{[2
]}

Zhou, Jingran ^{[2
]}

Shen, Liang ^{[2
]}

Ruan, Shengping ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] Jilin Univ, Coll Elect Sci & Engn, Changchun 130012, Peoples R China

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 06期

基金：

中国国家自然科学基金;

关键词：

BLIND;

D O I：

10.1364/OE.20.005936

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this letter, TiO2 nanocrystalline film was prepared on SrTiO3 (001) substrate to form an n-n heterojunction active layer. Interdigitated Au electrodes were deposited on the top of TiO2 film to fabricate modified HMSM (heterojunction metal-semiconductor-metal) ultraviolet photodetector. At 10 V bias, the dark current of the detector was only 0.2 nA and the responsivity was 46.1 A/W at 260 nm. The rise and fall times of the device were 3.5 ms and 1.4 s, respectively. The TiO2/SrTiO3 heterojunction contributed a lot to the high responsivity and reduced the fall time, which improved the device performance effectively. These results demonstrate the excellent application of TiO2/SrTiO3 heterojunction in fabricating high performance UV photodetectors. (c) 2012 Optical Society of America

引用

页码：5936 / 5941

页数：6

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