| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 분자전자 부문위원회 |
| 제목 | Oligomeric Bis-Imidazolium Salts for Application in Quasi-Solid-State Dye-Sensitized Solar Cells |
| 초록 | Due to their high energy conversion efficiency, low cost and environment-friendly photovoltaics, dye-sensitized solar cells (DSSCs) based on nanocrystalline porous TiO2 film have attracted widespread attention and have been investigated intensively as a potential alternatives to traditional photovoltaic cells. In DSSCs, organic solvent-based liquid electrolytes with inorganic triiodide/iodide as redox couple are generally used. However, there are problems for this type of solar cell, such as solvent evaporation, leakage of the electrolytes result in less long-term stability, and processability. Therefore, replacing liquid electrolytes with solid or quasi-solid electrolytes has been needed for the production of flexible photovoltaic cells using continuous manufacturing processes, such as roll-to-roll or web processes. Gel electrolytes also contribute to the amelioration of electrolyte leakage and help address the long-term stability problems associated with conventional DSSCs. In this work, new oligomeric bis-imidazolium salts having ethylene oxide units were prepared and applied as redox media. In order to form a quasi-solid state electrolyte, fumed silica nanoparticles were dispersed in the electrolyte system to create a hydrogen bond between the silanol groups on the surface of silica particles and the bis-imidazolium salts that prevents the viscous flow of let down electrolyte system. A DSSC comprises an electrode consisting of a nanocrystalline TiO2 layer with dye sensitizer adsorbed on the TiO2 surface, a Pt counter electrode, and an imidazolium ionic liquid electrolyte with an iodide/triiodide (I-/I3-) redox couple. In the DSSC, the overall conversion efficiency (η) was over 4.5% with 0.5M I2 and 8wt% SiO2. |
| 저자 | 김준영1, 송미연2, 박선희2, 김태호1, 김동영2, 안광덕2 |
| 소속 | 1성균관대, 2한국과학기술(연) |
| 키워드 | Imidazolium salts; Quasi-solid-state; DSSCs |
