TiO2 Nanoparticles Arrays Ultraviolet-A Detector With Au Schottky Contact

被引：27

作者：

Chakrabartty, Shubhro ^{[1
]}

Mondal, Aniruddha ^{[1
]}

Sarkar, Mitra Barun ^{[1
]}

Choudhuri, Bijit ^{[1
]}

Saha, Apu Kumar ^{[2
]}

Bhattacharyya, Anirban ^{[3
]}

机构：

[1] Natl Inst Technol, Dept Elect & Commun Engn, Agartala 799055, India

[2] Natl Inst Technol, Dept Math, Agartala 799055, India

[3] Univ Calcutta, Dept Radio Phys & Elect, Kolkata 700009, India

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2014年 / 26卷 / 11期

关键词：

Microscopy; nanotechnology; optical device fabrication; photoluminescence; photodetectors; Schottky diodes; PHOTODETECTOR;

D O I：

10.1109/LPT.2014.2313181

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We have demonstrated the synthesis of TiO2 nanoparticles (NPs) arrays on SiOx thin film using the glancing angle deposition technique. The deposited TiO2 NPs are 2-12 nm in size and have a density of similar to 2 x 10(12) cm(-2). The X-ray diffraction depicted that the TiO2 NPs are polycrystalline. An optical absorption measurement shows the maximum efficiency lies between 310 and 320 nm. The photoluminescence emission has been observed at 3.28 eV (similar to 378 nm) from TiO2 NPs. The Au/TiO2 NPs Schottky detector possesses a high ideality factor (11.4). The device has cutoff at 500 nm and maximum responsivity (0.05 A/W), external quantum efficiency (similar to 16%) at 378 nm. Under white light ON/OFF switching irradiation, the device current is increased from 1.9 to 38 nA and vice versa with a rise time of 1 s and decay time of 0.9 s.

引用

页码：1065 / 1068

页数：4

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