Visible-blind ultraviolet sensitive photodiode with high responsivity and long term stability

被引：31

作者：

Wu, Shuang-hong ^{[1
,2
]}

Li, Wen-lian ^{[1
,2
]}

Chu, Bei ^{[1
,2
]}

Lee, C. S. ^{[3
]}

Su, Zi-sheng ^{[1
,2
]}

Wang, Jun-bo ^{[1
,2
]}

Ren, Qing-jiang ^{[1
,2
]}

Hu, Zhi-zhi ^{[4
]}

Zhang, Zhi-qiang ^{[4
]}

机构：

[1] Chinese Acad Sci, Key Lab Excited State Proc, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

[3] City Univ Hong Kong, COSDAF, Hong Kong, Hong Kong, Peoples R China

[4] Univ Sci & Technol Liaoning, Sch Chem Engn, Anshan 114051, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 02期

基金：

中国国家自然科学基金;

关键词：

dyes; electric resistance; electrodes; infrared spectra; nanofibres; solar cells; titanium compounds; ultraviolet spectra; visible spectra; zirconium compounds; LIGHT-EMITTING-DIODES; PHOTODETECTORS;

D O I：

10.1063/1.3463483

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A high responsivity organic visible-blind ultraviolet photodiode is achieved using aluminum (III) bis(2-methyl-8-quinolinato)4-phenylphenolate (BAlq) and 4,4',4 ''-tri-(2-methylphenyl phenylamino) triphenylaine (m-MTDATA) as the electron acceptor and donor, respectively. Under 365 nm illumination with an intensity of 1.2 mW/cm(2), the photodiode behaves a maximum photoresponse of 514 mA/W at -7 V, which is markedly higher than previous reports in our group by Su et al. [Appl. Phys. Lett. 93, 103309 (2008)] and inorganic counterparts based on GaN (150 mA/W) and Si (120 mA/W), respectively. The operational time of the unsealed photodiode is larger than 1000 min when the photocurrent decreases to 67% of its original intensity in air environment. Harvest of so high performance photodiode is mainly attributed to the larger band offsets at m-MTDATA/BAlq heterojunction and skillful device design, etc. The improvement mechanisms are also augured in detail. (C) 2010 American Institute of Physics. [doi:10.1063/1.3463483]

引用

页数：3

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