| 학회 | 한국공업화학회 |
| 학술대회 | 2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 | 19권 1호 |
| 발표분야 | 에너지저장변환_포스터 |
| 제목 | Reverse structured dye-sensitized solar cells |
| 초록 | We report a novel structure of dye sensitized solar cells (DSSC) with reversed form by constructing all the components together at one substrate in order of platinum, titanium dioxide, and indium-doped tin oxide layer. To separate the photoanode from photocathode and make room for electrolytes, silica nanoparticle was introduced. With this new structure, the power conversion efficiency of 5.4% was achieved with comparable current density and open circuit voltage values to conventional structure. Moreover, the present approach could be an encouraging new direction in research while providing for the fabrication of hybrid-tandem solar cells. Dye-sensitized solar cells (DSSCs) are promising alternatives to conventional silicon solar cells and have been studied for the past two decades because of their advantages including color variety, a simple fabrication process, and a relatively high efficiency. Typical DSSCs consist of a TiO2 working electrode with dye molecules on transparent conductive oxide (TCO) glass, platinum coated counter electrode, and an electrolyte with a I-/I3- redox system between the electrodes. Extensive researches have been conducted in order that each component to achieve highly efficient DSSCs, including alternative materials, new structures of photoanode, and modifying fabrication method. Currently, fluorine-doped tin oxide (FTO) glass was widely used as TCO for DSSC. Even though the indium-doped tin oxide (ITO) was expected to be a better TCO material than FTO due to higher transparencies and conductivities, the fabrication step for TiO2 generally requires a 500oC annealing process and so the ITO substrate is not suitable for DSSC application since its conductivity decreases remarkably during the thermal process. Several research proposed to fabricate ITO based DSSCs using poly(ethylene terephthalate) (PET)/ITO, PET/ITO/Titanium dioxide (TiO2), ITO/antimony-doped tin oxide (ATO)/TiO2, and StSt/SiOx/ITO. However, these studies are limited to flexible substrate with low temperature process which may show not only poor adhesion between substrate and TiO2 particles but also poor contact between particles. Here, we introduce a novel structure of DSSCs that utilizes ITO layer without high temperature treatment barrier. Since ITO layer is placed after TiO2 calcination, high temperature process does not affect ITO layer. |
| 저자 | 이민오1, 전용석2 |
| 소속 | 1UNIST, 2건국대 |
| 키워드 | Reverse; dye-sensitized solar cells |
