電氣紡絲製程參數對可撓式染料敏化太陽能電池半導體電極之影響

Abstract

本研究利用電氣紡絲法製備可撓式染料敏化太陽能電池之半導體電極，探討電紡用高分子溶液中TiO2濃度、電紡之收集時間等兩種電氣紡絲製程參數對可撓式染料敏化太陽能電池光電特性之影響，並比較彎折前後半導體電極顯微結構及光電特性之變化。 由研究結果顯示，隨著電紡用高分子溶液中TiO2濃度的提高，電池之光電轉換效率也會提高，而電紡用高分子溶液中TiO2濃度並不會影響彎折後電池光電轉換效率之降幅；另一方面，半導體電極之膜厚有一限度，並非越厚越好，過厚的半導體電極將會導致光電轉換效率下降，隨著膜厚的增加，電池在經過彎折後，光電轉換效率的降幅也會變大。

In this study, semiconductor electrodes of flexible DSSC(dye-sensitized solar cells) was fabricated by electrospinning. Two major electrospinning process parameters, namely TiO2 concentration in polymer solution and collection time at electrospinning, were evaluated for their effects on the performance of flexible DSSC. We also compared the microstructure of semiconductor electrode and the efficiency of DSSC before and after bending. The result indicated that efficiency of flexible DSSC increased with increasing TiO2 concentration in polymer solution, and TiO2 concentration didn’t affect the decline rate of efficiency after bending. On the other hand, cell efficiency decreased when the thickness was too thick, the decline rate of efficiency increased with increasing thickness after bending.