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학술발표회초록보기

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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Formation of high voltage CH₃NH₃PbBr₃ solar cell by interface control

등록일
2014년 8월 28일 16시 30분 54초
접수번호
1251
발표코드
MAT.P-1142 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
김현빈, 이완인1,*
인하대학교 화학-화학공학융합학과, Korea
1인하대학교 화학과, Korea
Recently perovskite (CH3NH3PbI3) solid state solar cell draws great attention due to its high photovoltaic conversion efficiency (PCE) and economical fabrication process. Herein we studied Br-based perovskite (CH3NH3PbBr3) solar cell that offers ultra-high open circuit voltage (VOC) because of its selectively wider band gap and higher conduction position. In this work, we prepared Au/CH3NH3PbBr3/TiO2/FTO cells, belonging to depleted heterojunction solar cell. Perovskite acts as not only an absorber but also a hole transport material (HTM). This solar cells without introducing hole-transporting layer exhibit ultra-high VOC higher than 1.3V. By controlling the TiO2 surface and optimizing the cell structure, the PCE over 5% was achieved in this work. TiO2 surface was passivated by organic molecules with carboxylic functional group. By introducing organic molecular layer between TiO2 and CH3NH3PbBr3 layer, the electron transport from the perovskite to TiO2 layer was significantly enhanced. Resultantly, VOC and PCE were enhanced to 1.36 V and 5.3 %, respectively.

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