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  • 09월 04일 13시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Spherical nanoporous TiO2 structure as scattering layer for high-efficiency dye-sensitized solar cells

2009년 8월 14일 15시 39분 51초
금29B5구 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 14시 : 50분
재료화학 - Recent Progresses in Materials Chemistry
저자 및
김용주, 유인경, 이완인
인하대학교 화학과, Korea
In recent years, dye-sensitized solar cells (DSSC) have attracted great attention due to their low cost, easy fabrication, high energy conversion efficiency and flexible device is available. In general, the bilayer structure with light scattering particle over the nanocrystalline TiO2 film in the DSSC has been adopted widely, because it enhances the photocurrent density and the overall conversion efficiency. Herein, we developed and optimized new type bi-functional scattering materials for light scattering and charge generation. For this purpose, controlling the size of monodispersed nanoporous spherical TiO2 structures ranging from 200 nm to 800 nm have been synthesized by altering the concentration of water in the sol-gel reaction with titanium alkoxide and modified solvothermal treatment. The prepared nanoporous TiO2 sphere structures with high surface area were applied to scattering layer in DSSC. By introducing this scattering layer, the achieved the photovoltaic conversion efficiency was higher than that of the DSSC with commercial scattering materials such as 300 nm-sized single-crystalline anatase TiO2 particles. By using the this bi-functional scattering materials, we achieved optimum conversion efficiency over the 10 % under AM-1.5G one sun light intensity. The correlation between scattering efficiency depend on the size of TiO2 sphere and photovoltaic conversion efficiency were also discussed.