| 학회 | 한국재료학회 |
| 학술대회 | 2011년 봄 (05/26 ~ 05/27, 제주 휘닉스 아일랜드) |
| 권호 | 17권 1호 |
| 발표분야 | 제 20회 신소재 심포지엄-CMPS Symposium |
| 제목 | Template-directed Atomic Layer Deposition-grown TiO2 Nanotubular Photoanode-based Dye-sensitized Solar Cells |
| 초록 | Dye sensitized solar cells (DSC) are promising devices for inexpensive, nontoxic, transparent, and large-scale solar energy conversion. Generally thick TiO2 nanoporous films act as efficient photoanodes with their large surface area for absorbing light. However, electron transport through nanoparticle networks causes the slowdown and the loss of electron transport because of a number of interparticle boundaries inside the conduction path. We have studied DSCs with precisely dimension-controlled TiO2 nanotubes array as photoanode. TiO2 nanotubes array is prepared by template-directed fabrication method with atomic layer deposition. Well-ordered nanotubes array provides not only large surface area for light absorbing but also direct pathway for electrons with minimalized grain boundaries. Large enlongated anatase grains in the nanotubes could enhance the conductivity of electrons, but also suppress the recombination with holes through defect sites during diffusion into the electrode. To study the effect of grain boundaries, we fabricated two kinds of nanotubes which have different grain sizes by controlling deposition conditions. And we studied electron conduction through two kinds of nanotubes with different grain structures. The solar cell performance was studied as a function of thickness and grain structures. And overall solar-to-electric energy conversion efficiencies of up to 7% were obtained. |
| 저자 | 유현준1, Sovan Kumar Panda2, 김현철1, 김명준2, 양윤정1, 이선희2, 신현정1 |
| 소속 | 1국민대, 2신소재공학과 |
| 키워드 | TiO2 nanotube; dye-sensitized solar cells; atomic layer deposition |
