Applied Chemistry for Engineering, Vol.21, No.3, 291-294, June, 2010
다층구조의 TiO2 전극을 이용한 염료감응형 태양전지의 변환효율
Conversion Efficiency of Dye-sensitized Solar Cells Using Multi-layered TiO2 Electrodes
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초록
최근 고효율 염료감응형 태양전지를 위한 다층구조의 TiO2 전극에 대한 연구가 관심을 받고 있다. 본 연구에서는 입자의 크기가 작고 큰 TiO2로 이루어진 다층구조의 TiO2 전극에 대해 연구하였다. 나노구조를 갖는 TiO2 분말은 TiCl4를 가수분해하여 합성하였다. 크기가 7.6 nm 및 18 nm인 TiO2 분말은 소성온도를 조절하여 얻었다. 다층구조를 갖는 TiO2 전극이 단락전류(Jsc)에 큰 영향을 미치는 것을 확인하였으며, 또한 다층구조를 갖는 TiO2 전극이 각각의 입자만을 사용한 염료감응형 태양전지 보다 변환효율이 증가함을 확인하였다.
Recently, the design of the multi-layered TiO2 electrodes has been attracted for high efficiency of dye-sensitized solar cells. In this study, conversion efficiency of the multi-layered TiO2 electrodes was investigated by using small and large TiO2 nanoparticles. Nanostructured TiO2 powders were prepared by TiCl4 hydrolysis. Differently sized TiO2 powders of which the average diameter was 7.6 and 18 nm were obtained by controlled calcination temperature. It was confirmed that multi-layered TiO2 electrodes significantly influence short-circuit current (Jsc) and also show higher conversion efficiency than dye-sensitized solar cells consisting of each particles.
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