A high performance broadband photodetector based on (SnxSb1−x)2Se3 nanorods with enhanced electrical conductivity. Issue 41 (4th October 2018)

• Record Type: Journal Article
• Authors: Chen, Shuo; Shehzad, Khurram; Qiao, Xvsheng; Luo, Xue; Liu, Xuemei; Zhang, Yuting; Zhang, Xianghua; Xu, Yang; Fan, Xianping
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 41(2018)
• Page Start: 11078
• Page End: 11085
• Publication Date: 2018-10-04
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8tc03834a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : An effective hot-injection method is used to synthesize (Sn x Sb1− x )2 Se3 nanorods with enhanced electrical conductivity for high performance broadband photodetection. Abstract : Sb2 Se3 is a highly interesting narrow band gap semiconductor with promising applications in new-generation electronic and photoelectronic devices. However, it has intrinsically low electrical conductivity, which limits its broader scope of applications. To overcome this challenge, Sn-doped Sb2 Se3 ((Sn x Sb1− x )2 Se3 ) nanorods with enhanced electrical conductivity are firstly synthesized via a facile hot-injection method. With increasing the doping concentration of Sn 4+, the (Sn x Sb1− x )2 Se3 nanorods exhibit several orders of magnitude improvement in electrical conductivity, which originates from the increase of carrier concentration. The photodetector based on the (Sn x Sb1− x )2 Se3 nanorod film shows a higher responsivity (6.21 A W −1 ) and external quantum efficiency (906%), a lower noise equivalent power (3.14 × 10 −13 W Hz −1/2 ), and a fast response time (0.04 s), surpassing the performance of the Sb2 Se3 nanorod film photodetector. In addition, the (Sn x Sb1− x )2 Se3 nanorod film photodetector also displays a broadband spectral response ranging from UV to IR. Those excellent performances unambiguously demonstrate that the (Sn x Sb1− x )2 Se3 nanorods are promising for utilization as highly efficient broadband photodetectors.