High response Schottky ultraviolet photodetector formed by PEDOT:PSS transparent electrode contacts to Mg0.1Zn0.9O

doi:10.1088/1674-1056/24/10/107302

Abstract In this paper, we report a Schottky ultraviolet photodetector based on poly (3,4-ethylenedioxy-thiophene) poly(styrenesulfonate) (PEDOT:PSS) transparent electrode contacts to Mg_0.1Zn_0.9O. The I-V characteristic curves of the device are measured in the dark condition and under the illumination of a 340-nm UV light. The device shows a typical rectifying behavior with a current rectification ratio of 10³ at ± 2 V, which exhibits a good Schottky behavior. The photo-to-dark current ratio is high, which is 1× 10³ at -4 V. A peak response of 0.156 A/W at 340 nm is observed. The device also exhibits a wide response from 250 nm to 340 nm, with a response larger than 0.1 A/W. It covers the UV-B region (280 nm-320 nm), which makes the device very suitable for the detection of UV-B light.

Keywords: Schottky junction ultraviolet photodetector MgZnO PEDOT:PSS

Received: 15 February 2015
Revised: 06 May 2015
Accepted manuscript online:

PACS:	73.30.+y	(Surface double layers, Schottky barriers, and work functions)
	73.61.Ga	(II-VI semiconductors)
	73.61.Ph	(Polymers; organic compounds)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 50972007), the National Basic Research Program of China (Grant No. 2011CB932703), the National Natural Science Foundation for Distinguished Young Scholars of China (Grant No. 60825407), and the Opened Fund of the State Key Laboratory on Integrated Optoelectronics.

Corresponding Authors: Zhang Xi-Qing
E-mail: xqzhang@bjtu.edu.cn

Cite this article:

Hu Zuo-Fu (胡佐富), Wu Huai-Hao (吴怀昊), Lv Yan-Wu (吕燕伍), Zhang Xi-Qing (张希清) High response Schottky ultraviolet photodetector formed by PEDOT:PSS transparent electrode contacts to Mg_0.1Zn_0.9O 2015 Chin. Phys. B 24 107302

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High response Schottky ultraviolet photodetector formed by PEDOT:PSS transparent electrode contacts to Mg0.1Zn0.9O

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High response Schottky ultraviolet photodetector formed by PEDOT:PSS transparent electrode contacts to Mg_0.1Zn_0.9O