| 초록 |
Dye-sensitized solar cells (DSSCs) have been reported as a new type of solar cell which converts the visible light into electricity with simple manufacturing procedures, less toxic, and colorful devices. DSSC consists of TiO2 semiconductor based photo electrode, counter electrode as Pt coated, and I-/I3- redox couple as electrolyte. Until now, the maximum photovoltaic conversion efficiency (PCE) of DSSC has been limited to 11.9±0.4% (DOI: 10.1002/pip.2788), although its theoretical efficiency of DSSC is 32%. There have been many attempts to increase the PCE of DSSCs, for example, doping metal element onto the TiO2 lattice, preparation of TiO2 with high surface area and TiO2/metal oxide composite. In this study, we synthesised TiO2 nanoparticles (TNPs) and nanofibers (TNFs) by using hydrothermal or elctrospinning method. An XRD method and FE-SEM were employed to investigate the crystalline and morphological structure. The electrochemical properties was determined by the J-V curve and EIS analyses. According to the results, while the PCE of TNPs based DSSC was measured to approximately 5.0%, that of TNPs/TNFs composite based DSSC was found to be higher than 6%. |
