染料敏化太陽能電池阻絕層製備與其對電池電性影響

Preparation of blocking layer and its influence on dye-sensitized solar cell

張嘉珉(Chang, Chiamin)

指導教授 ： 丁初稷

國立中正大學/工學院/光機電整合工程研究所/碩士(2012年)

摘要

本研究使用Y2Ti2O7 作為阻絕層，將Y2Ti2O7 溶液旋轉塗佈於二氧化鈦薄膜上，經高溫煅燒形成非結晶Y2Ti2O7薄膜，藉由塗佈不同濃度的Y2Ti2O7 溶液以改變阻絕層厚度，製作成染料敏化太陽能電池，研究Y2Ti2O7 阻絕層對電池電性影響。Y2Ti2O7 阻絕層與二氧化鈦薄膜上可降低染料吸光後產生的電子與電解液還原，或與染料上的電洞複合。而Y2Ti2O7 阻絕層的厚度若太厚，雖可阻止電子與電解液還原，但卻也讓電子無法順利穿隧Y2Ti2O7阻絕層，使得注入二氧化鈦的電子數量減少；Y2Ti2O7 阻絕層的厚度若太薄，則是無法阻止電子與電解液還原，或與電洞複合，導致注入二氧化鈦的電子數量減少。
本研究最佳化染料敏化太陽能電池特性為旋轉塗佈0.0025 M的Y2Ti2O7 溶液於二氧化鈦薄膜上，電流密度7.74 mA/cm2，開路電壓0.72 V，電池轉換效率3.40%。

關鍵字

染敏化敏 ； 阻絕層 ； 太陽能電池

並列摘要

Use ultrathin Y2Ti2O7 film as blocking layer for dye-seneitized solar cell in this study. TiO2 electrode was coated with Y2Ti2O7 precursor solution. After high temperature sintering formed amorphous ultrathin Y2Ti2O7 layer. The thickness of Y2Ti2O7 layer dependent on precursor solution concentration. We fabricated dye-sensitized solar cells.with ultrathin Y2Ti2O7 layer on TiO2 electrode.
Y2Ti2O7 layer can reduce recombination between electricon、electrolyte and electric hole. A isuitable Y2Ti2O7 layer thickness is required for the cell performance. Y2Ti2O7 layer thickness is too thick, it blocked the electron injection to TiO2 electrode. Y2Ti2O7 layer thickness is too thin, it can’t reduce recombination between electricon、electrolyte and electric hole.
In this study, optimum dye-sensitized solar cells at spin coating 0.025M Y2Ti2O7 precursor solution on TiO2 electrode and its current density, open circuit voltage ,and conversion efficiency were 7.74 mA/cm2, 0.72 V, 3.40%.

並列關鍵字

blocking layer ； dye-sensitized solar cell

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