本論文係研究奈米粒子對染料敏化太陽能電池特性之影響。染料光吸收量的不足使得效率難以提升,本研究嘗試摻雜ZnSe量子點及金奈米粒子於二氧化鈦粉末經過高溫燒結製成多孔電極,以彌補染料和二氧化鈦對光吸收量的不足。經由實驗得知摻雜ZnSe量子點的DSSC可以增加吸光量,由IPCE和波長的關係圖可以見到,特別是在波長440nm處有明顯的吸收峰值,因而彌補ZnPc對光的吸收不足,並且提升效率,本實驗中,摻雜5wt % ZnSe量子點的DSSC短路電流密度 =4.83 mA/c ,開路電壓Voc = 0.440 ,填充因子FF = 0.301,效率η = 0.64 %;另一方面摻雜金奈米粒子的DSSC可以提升短路電流密度 ,經由實驗後所得到的短路電流密度 =5.79 mA/c 較原先未摻雜的DSSC提升了71.8%,,開路電壓Voc = 0.32 ,填充因子FF = 0.34,效率η = 0.64 %。
In this work, we develop ZnSe quantum-dots (QDs) dye-sensitized solar cells. The performance of solar cells was observed by changing the amount of ZnSe QDs. DSSCs with 5 wt% ZnSe QDs exhibited optimum results. The short-circuit current density Jsc = 4.83 mA/c , the open-circuit voltage Voc = 0.440, the fill factor FF = 0.301, and the power conversion efficiencies η = 0.64 %. According to some reference adding golden nanoparticle layer between TiO2 and dyes can promote short-circute current density Jsc and reduce the open-circute voltage Voc. However in this experiment we try to mix gold nanoparticles and TiO2. Finally, =5.79 mA/c , Voc = 0.32 ,FF = 0.34 and η = 0.64 % are the result