| 학회 | 한국공업화학회 |
| 학술대회 | 2010년 봄 (05/13 ~ 05/14, BEXCO(부산)) |
| 권호 | 14권 1호 |
| 발표분야 | Solar Cell |
| 제목 | Recent Advances in Dye-Sensitized Solar Cells |
| 초록 | Dye-sensitized solar cells (DSSCs) have been recently paid much attention because of their low production cost, relatively high efficiency and various practical application potentials. Research progress in the field of DSSCs has been remarkable for last decade in Korea. In this presentation, the recent advances achieved by the Center for Next Generation Dye-Sensitized Solar Cells will be briefly introduced for dyes, charge transfer layer and electrolyte. The Center, supported by the Ministry of Education, Science and Technology, has been established in 2008 to promote the developments of technologies for DSSCs with members of 14 Professors. Organic dyes containing indole or bulky spirobifluorene were designed, showing the energy conversion efficiency of 6.5 to 8.4 % under illumination of AM 1.5 and 100 mW cm-2. New anchoring group of triethoxy silane was also proposed in dyes. In addition, quantum dots have been used as a sensitizer for solar cells. Submicron-sized spheres (300~1,400 nm) comprising many primary nanoparticles (~ 10 nm) having surface area of up to 116.5 m2 g-1 were prepared by a simple urea-assisted hydrothermal process, and used to form a novel charge transporting semiconductor layer. The overall energy conversion efficiency of 7.54% under 1 sun was achieved using the mesoporous TiO2 sphere electrode, which was significantly higher than a commercial Degussa P25 TiO2 nanocrystals electrode (5.69%). The improved performance may be mostly due to the enhanced light harvesting and a increased amount of dye loading. Oligomeric co-adsorbents containing COOH functional group on the TiO2 nanostructured photoanode were introduced to reduce the electron recombination rate. At the same time, the co-adsorbent influenced the shift of the band edge of the photoanode. As a result both effects of the band edge shift and the slower recombination rate enhanced the open circuit voltage (Voc), short circuit current (Jsc) and power conversion efficiency (η). |
| 저자 | Yong Soo Kang |
| 소속 | Hanyang Univ. |
| 키워드 | 1 |
