Effect of Electrical Contact on the Performance of Bi2S3 Single Nanowire Photodetectors. Issue 12 (6th August 2014)

• Record Type: Journal Article
• Authors: Li, Renxiong; Yang, Juehan; Huo, Nengjie; Fan, Chao; Lu, Fangyuan; Yan, Tengfei; Wei, Zhongming; Li, Jingbo
• Is Part Of: Chemphyschem. Volume 15:Issue 12(2014)
• Page Start: 2510
• Page End: 2516
• Publication Date: 2014-08-06
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201402201
• Languages: English
• ISSNs: 1439-4235

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Bi₂S₃ single‐crystalline nanowires are synthesized through a hydrothermal method and then fabricated into single nanowire photodetectors. Due to the different contact barrier between the gold electrode and Bi₂S₃ nanowires, two kinds of devices with different electrical contacts are obtained and their photoresponsive properties are investigated. The non‐ohmic contact devices show larger photocurrent gains and shorter response times than those of ohmic contact devices. Furthermore, the influence of a focused laser on the barrier height between gold and Bi₂S₃ is explored in both kinds of devices and shows that laser illumination on the AuBi₂S₃ interface can greatly affect the barrier height in non‐ohmic contact devices, while keeping it intact in ohmic contact devices. A model based on the surface photovoltage effect is used to explain this phenomenon.</p> </abstract>