title: High-performance room-temperature hydrogen sensors based on combined effects of Pd decoration and Schottky barriers.
abstract: A new hydrogen sensor was fabricated by coating a Pd-decorated In2O3 film on Au electrodes. In response to 1 vol% H2 at room temperature, an ultra high sensitivity of 4.6 × 10(7) was achieved. But after an annealing treatment in vacuum, its sensitivity degenerated by 4 orders of magnitude. In addition, the response time and recovery time were also extended from 28 s and 32 s to 242 s and 108 s, respectively. It was found from contrast experiments that Pd decoration was essential to make the sensor work at room temperature and Schottky barriers played a vital role in enhancing the sensor's performance. The methodology demonstrated in this paper shows that a combination of novel sensing materials and Schottky contact is an effective approach to design high-performance gas sensors.
authors: Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, China.
authors: Bin
authors: B
authors: Liu
authors: Daoping
authors: D
authors: Cai
authors: Yuan
authors: Y
authors: Liu
authors: Han
authors: H
authors: Li
authors: Chao
authors: C
authors: Weng
authors: Guoshi
authors: G
authors: Zeng
authors: Qiuhong
authors: Q
authors: Li
authors: Taihong
authors: T
authors: Wang