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

• 作者: 吕燕伍 吴怀昊 张希清 胡佐富
• 来源期刊: 中国物理B（英文版）
• 关键词: Schottky junction ultraviolet photodetector MgZnO PEDOT:PSS
• 年，卷（期）: 2015,（10）
• 页码范围: 107302-1-107302-3
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/10/107302

摘要

In this paper, we report a Schottky ultraviolet photodetector based on poly (3,4-ethylenedioxy-thiophene) poly(styrenesulfonate) (PEDOT:PSS) transparent electrode contacts to Mg0.1Zn0.9O. 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.