The Effect of Particle Size and Thickness on Nanocrystalline TiO_2 Films on Dye-Sensitized Solar Cells for Indoor Application

摘要

Dye-sensitized solar cell has a unique property such as transparent, colorful characteristics and good performance under low/diffused light intensities, compared to other type of solar cells. Here, we have investigated effects of TiO_2 particle size (14, 22, 50nm) and the thickness (2 to 20 μm) on nanocrystalline TiO_2 films on photovoltaic performance in dye-sensitized solar cell under 1 sun, compact fluorescent lamp (CFL) and light-emitting diode (LED 3200K, 5000K) at 200 to 1000 lux. Further, the DSSCs fabricated using a TiO_2 (22nm) film of 13.73 μm thickness at 1sun condition exhibited the best photovoltaic performance with highest power conversion efficiency (7.22%). However, the DSSC efficiency essentially follows the same trend with TiO_2 film thickness, exhibiting the maximum efficiency value of 13.26% for the 16.72 μm thickness of TiO_2 (50nm) film at LED 3200K (1000 lux).