스핀 코팅법으로 제작한 다공성 CuBr 필름의 암모니아 감응특성
NH3 sensing properties of porous CuBr films prepared by spin-coating
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Porous copper bromide (CuBr) films are highly advantageous for detecting ammonia (NH3). The fabrication of porous CuBr films requires complex high-temperature processes or multistep processes. Herein, we report the uncomplicated preparation of porous CuBr films by a spin-coating method and the films’ excellent NH3 sensing properties. The porous films were prepared by spin-coating 100, 150, and 200 mM CuBr solutions, and then dried in a vacuum oven for 2 h. All the films showed a high NH3 response; in particular, the film prepared using a 100 mM CuBr solution showed an extremely high response (resistance ratio = 852) to 5 ppm NH3. The film also showed fast response and recovery times, 272 s and 10 s respectively, even at room temperature. The outstanding NH3 sensing characteristics were explained in relation to the porosity and thickness of the prepared films. The high-performance NH3 sensors used in this study can be used for both indoor air quality and environmental monitoring applications.
Abstract
Porous copper bromide (CuBr) films are highly advantageous for detecting ammonia (NH3). The fabrication of porous CuBr films requires complex high-temperature processes or multistep processes. Herein, we report the uncomplicated preparation of porous CuBr films by a spin-coating method and the films’ excellent NH3 sensing properties. The porous films were prepared by spin-coating 100, 150, and 200 mM CuBr solutions, and then dried in a vacuum oven for 2 h. All the films showed a high NH3 response; in particular, the film prepared using a 100 mM CuBr solution showed an extremely high response (resistance ratio = 852) to 5 ppm NH3. The film also showed fast response and recovery times, 272 s and 10 s respectively, even at room temperature. The outstanding NH3 sensing characteristics were explained in relation to the porosity and thickness of the prepared films. The high-performance NH3 sensors used in this study can be used for both indoor air quality and environmental monitoring applications.
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