| 초록 |
Dye-sensitized solar cells (DSCs) based on nanocrystalline TiO2 layer and dye sensitizer have attracted considerable interest for the past decades due to their attractive features such as their high energy conversion efficiency and low production costs. Electrolyte, consisting of salts (i.e. alkalimetal iodides or imidazolium iodides and iodine) dissolved in a medium, is one important component for DSCs in determining the photovoltaic properties as well as durability. Generally, liquid solvents (e.g. acetonitrile) have been commonly employed as a medium for dissolving regenerable redox couples (i.e. I-/I3-), resulting in high energy conversion efficiency as high as 11.04 % (at 1 sun condition). However, DSCs employing liquid electrolytes suffer from drawbacks such as a leakage and an evaporation of volatile organic liquid solvents. Therefore, researches on solid or quasi-solid state electrolytes have been recently progressed for solid state DSCs. Here, fabrication methods and characteristics of solid state DSCs employing polymer electrolyte by “Oligomer Approach” will be presented. |
