Room-temperature sensing of NH3 gas using CsPbBr3 thin films grown via dual-source evaporation

Phung Dinh Hoat, Van Khoe Vo, Sung Hoon Bae, Hyo Jun Lim, Dang Thi Huong Thao, Pham Tien Hung, Nguyen Manh Hung, Nguyen Van Hoang, Joon Hyung Lee, Young Woo Heo

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

An effective ammonia sensor was developed using a CsPbBr3 thin film prepared directly by dual-source thermal evaporation. The CsPbBr3-based sensor exhibited good selectivity toward ammonia gas at room temperature, showing a high responsivity (958% at 10 ppm) and low detection limit (250 ppb). The sensor also demonstrated good reversibility, repeatability and fast rise/recovery times (12/16 s). Additionally, the effect of humidity on ammonia responsivity was investigated for the application of CsPbBr3 films in practical room-temperature ammonia gas sensors. The ammonia-sensing mechanism of the CsPbBr3 film was proposed and discussed.

Original languageEnglish
Article number170731
JournalJournal of Alloys and Compounds
Volume960
DOIs
StatePublished - 15 Oct 2023

Keywords

  • Ammonia gas sensor
  • CsPbBr
  • Halide perovskites
  • Room-temperature gas sensor
  • Thermal evaporation

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