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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Observation of intermediate state in organic-inorganic hybrid perovskite thin film fabricated by two-step sequential vacuum evaporation method

등록일
2019년 1월 7일 23시 03분 59초
접수번호
2745
발표코드
PHYS.P-76 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 19일 (금요일) 11:00~12:30
발표형식
포스터
발표분야
Physical Chemistry
저자 및
공동저자
Young Mi Lee
Beamline Department, Pohang Accelerator Laboratory (PAL), Korea

Organic-inorganic hybrid perovskites (OHP), described by ABX3 (A = organic cation, B = metal cation, X = halogen anion) has attracted much attention as a candidate material for future solar-cell applications with easy-fabrication, low-cost, and high-efficiency. Therefore, OHP materials are motivated not only to enhance performance for solar-cell application but also to bring to light new phenomena relevant to other technological application such as light emitting diode, laser, optoelectronics and thermos electronics, among others. We performed the systematic experiment with different inorganic material first layer deposition rates to confirm the quality of thin films fabricated by the sequential vacuum evaporation method (SVE) method. As the deposition rate was increased, the hybrid perovskite forms well. However, we found the tiny grain and the intermediate state, and the molecular defect is observed. From these findings, we speculate why a vacuumevaporated OHP-based solar-cell has relatively low PCE and material instability.


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