A Study of High-Sensitivity Electro-Resistance Type Pre-Annealing ZnO-Doped CsPbBr3 Perovskite Acetone Sensors

Lung-Chien Chen; An-Ni Sung; Kun-Yi Lee

doi:10.3390/s23042164

A Study of High-Sensitivity Electro-Resistance Type Pre-Annealing ZnO-Doped CsPbBr₃ Perovskite Acetone Sensors

Sensors (Basel). 2023 Feb 14;23(4):2164. doi: 10.3390/s23042164.

Authors

Lung-Chien Chen¹, An-Ni Sung¹, Kun-Yi Lee²

Affiliations

¹ Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.
² Department of Electrical Engineering, China University of Science and Technology, Taipei 11581, Taiwan.

Abstract

In this work, acetone gas sensors were fabricated using pre-annealing metal oxide zinc oxide (pa-ZnO)-doped perovskite cesium lead bromide (CsPbBr₃). The ZnO nanopowder, before it was doped into CsPbBr₃ solution, was first put into a furnace to anneal at different temperatures, and formed the pa-ZnO. The properties of pa-ZnO were different from ZnO. The optimized doping conditions were 2 mg of pa-ZnO nanopowder and pre-annealing at 300 °C. Under these conditions, the highest sensitivity (gas signal current-to-air background current ratio) of the ZnO-doped CsPbBr₃ perovskite acetone sensor was 1726. In addition, for the limit test, 100 ppm was the limit of detection of the ZnO-doped CsPbBr₃ perovskite acetone sensor and the sensitivity was 101.

Keywords: CsPbBr3; acetone gas sensor; perovskite; pre-annealing ZnO.

Grants and funding

This research was supported by the Ministry of Science and Technology (Taiwan) under Contract No. 111-2221-E-027-040-MY3. This work was also supported by the NTUT-Industry Joint Research Program under contract No. 211A171.