다이메틸암모늄 유도 CsPbI3 페로브스카이트 상의 상전이 거동에 대한 열과 수분의 영향
(주)코리아스칼라
- 최초 등록일
- 2023.11.06
- 최종 저작일
- 2023.08
- 8페이지/
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서지정보
ㆍ발행기관 : 한국재료학회
ㆍ수록지정보 : 한국재료학회지 / 33권 / 8호
ㆍ저자명 : 강소현, 이승민, 노준홍
목차
1. 서 론
2. 실험 방법
2.1. 시약
2.2. 페로브스카이트 박막 제작 및 봉지화 방법
2.3. 분석법
3. 결과 및 고찰
3.1. 열에 의한 상안정성
3.2. 수분에 의한 상안정성
3.3. 상안정화를 위한 격자 유지 방안
4. 결 론
Acknowledgement
영어 초록
Cesium lead iodide (CsPbI3) with a bandgap of ~1.7 eV is an attractive material for use as a wide-gap perovskite in tandem perovskite solar cells due to its single halide component, which is capable of inhibiting halide segregation. However, phase transition into a photo inactive δ-CsPbI3 at room temperature significantly hinders performance and stability. Thus, maintaining the photo-active phase is a key challenge because it determines the reliability of the tandem device. The dimethylammonium (DMA)-facilitated CsPbI3, widely used to fabricate CsPbI3, exhibits different phase transition behaviors than pure CsPbI3. Here, we experimentally investigated the phase behavior of DMA-facilitated CsPbI3 when exposed to external factors, such as heat and moisture. In DMA-facilitated CsPbI3 films, the phase transition involving degradation was observed to begin at a temperature of 150 °C and a relative humidity of 65 %, which is presumed to be related to the sublimation of DMA. Forming a closed system to inhibit the sublimation of DMA significantly improved the phase transition under the same conditions. These results indicate that management of DMA is a crucial factor in maintaining the photo-active phase and implies that when employing DMA designs are necessary to ensure phase stability in DMA-facilitated CsPbI3 devices.
참고 자료
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