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  • 09월 04일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Molecular Engineering for efficient light harvesting and collection

2014년 8월 28일 17시 00분 00초
INOR.O-4 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 11시 : 00분
무기화학 - Oral Presentation for Young Inorganic Chemists
저자 및
고려대학교 신소재화학과, Korea
Part 1. The remarkably efficient exciton migration in DA-MOF is attributed to enhanced π-conjugation through the addition of two acetylene moieties in the porphyrin molecule, which leads to greater Q-band absorption intensity and much faster exciton-hopping (energy transfer between adjacent porphyrin struts). The long distance and directional energy migration in DA-MOF suggest promising applications of this compound or related compounds in solar energy conversion schemes as an efficient light-harvesting and energy-transport component. Part 2. Recombination at the TiO2/electrolyte interface, detachment (desorption) of molecular dyes from photo-electrodes, and detachment (desorption) of molecular dyes from photo-electrodes are the major limitations for the operation of dye-sensitized solar cells (DSCs). Herein demonstrated is a method to greatly inhibit these losses by growing transparent metal oxides (TiO2, Al2O3, and SiO2) on the dye-coated photo-electrode via atomic layer deposition (ALD) or cross-linking beween metal precusors. The post-metal oxide coating covers the highly convoluted surface of the TiO2 conformally and with a uniform thickness throughout the thousands of layers of nanoparticles. The subsequent coverage by metal oxides could provide a means to not only efficiently reduce the intermolecular interaction of dyes, but also to retard the interfacial charge recombination dynamics. DSCs incorporating these selective and self-aligned metal-oxide layers achieved a 30-40% increase in relative efficiency versus control uncoated cells. A detailed photophysical study using time-resolved fluorescence (TRF) spectroscopy is used to obtain a better understanding of the mechanism by which the post ALD treatment alters the performance of DSSCs.