High responsivity ultraviolet detector based on novel SnO2 nanoarrays
Xinhua Pan1, Tao Zhang1, Qiaoqi Lu1
1State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University Hangzhou 310027 People's Republic of China panxinhua@zju.edu.cn.
Abstract:
In this work, tin oxide (SnO2) nanoarrays (NAs) with a novel morphology were fabricated by a hydrothermal method. Each SnO2 nanorod (NR) consisted of a bunch of nearly ten primary NRs with a width of 4-7 nm. On this basis, gold (Au) nanoparticles (NPs) were used to induce the growth of smaller and more orderly SnO2 NAs. The prepared ultraviolet (UV) detectors based on SnO2 NAs have high responsivity and high external quantum efficiency (EQE) under 20 μW cm-2 UV light with only 1 V external bias voltage.
