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  • 08월 18일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Genetic Algorithm-Assisted Optimization of Partially Dyed-TiO2 for Room-Temperature Printable Photoanodes of Dye-sensitized Solar Cells

등록일
2011년 8월 5일 16시 56분 14초
접수번호
1617
발표코드
ELEC.O-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 15시 : 00분
발표형식
구두발표
발표분야
전기화학 - Oral presentation of future electrochemists
저자 및
공동저자
표명호, 배은경, 황윤화1
순천대학교 화학과, Korea
1순천대학교 인쇄전자공학과, Korea
The processing parameters for photoanodes that are printable in a room-temperature (RT) continuous process for dye-sensitized solar cells (DSCs) were optimized by use of Genetic Algorithm (GA). The photoanodes were prepared at RT from mixtures of partially dyed-TiO2 (PDT) with various sizes and dye-loadings and were subsequently compressed for the fabrication of PDT films with different compositions, nanoporous structures, and thicknesses. According to our decision parameter design, there were 220 different cases, from which only 30 chromosomes for each generation were selected for the testing of photovoltaic performance to determine the global optimal point in power conversion efficiency (?). After 7 generations (i.e., only 210 chromosomes tested out of 220), ? reached 6.02 %, which was 22 % higher than the value reported previously without the aid of a GA. The photoanode composed of a mixture of 14, 21, and 40 nm TiO2 with different dye-loadings and compressed to a thickness of 8.0 ?m under 94 MPa, showed the highest ? (short circuit current = 12.03 mA?cm-2, open circuit voltage = 685 mV, fill factor = 72.8 %). A comparison of the photovoltaic parameters and characteristic charge transport properties revealed that sparsely dyed small TiO2 provided an efficient electron transport route to increase short circuit current. The role of large TiO2 dyed up to monolayer coverage, on the other hand, was also disclosed to partially increase short circuit current by light scattering. We hope that the GA-assisted photoanode optimization, presented here, will encourage new research directions, while providing an efficient RT printing process for the continuous fabrication of DSCs.

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