Turning a disadvantage into an advantage: synthesizing high-quality organometallic halide perovskite nanosheet arrays for humidity sensors. Issue 10 (3rd February 2017)

• Record Type: Journal Article
• Authors: Ren, Kuankuan; Huang, Le; Yue, Shizhong; Lu, Shudi; Liu, Kong; Azam, Muhammad; Wang, Zhijie; Wei, Zhongming; Qu, Shengchun; Wang, Zhanguo
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 10(2017)
• Page Start: 2504
• Page End: 2508
• Publication Date: 2017-02-03
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc05165k
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A humidity sensor made of uniform perovskite nanosheet arrays displayed good performance, and hence represents a new application for perovskite materials. Abstract : Though power conversion efficiencies of perovskite solar cells of over 21% have been reported, the degradation of the performance of these cells in the presence of moisture still inhibits the commercialization of these otherwise promising devices. Herein, we decided to utilize the moisture sensitivity of perovskite materials and fabricate a moisture detector based on high-quality CH3 NH3 PbI3− x Cl x nanosheet arrays. The resulting devices present a high sensitivity towards humidity with device resistance significantly dropping from 1.28 × 10 8 Ω at 30% relative humidity (RH) to 7.39 × 10 4 Ω at 90% RH and a response even faster than that of the commercial psychrometer. This response was even steeper than those of commercial psychrometers. Moreover, our device showed good reversibility and impressive specificity. Thus, the humidity sensitivity of perovskites, while disadvantageous for solar cell applications, was found to be quite applicable in a new field.