以奈米多孔陽極氧化鋁製備陣列式染料敏化太陽能電池半導體電極之研究

Abstract

本研究利用薄膜式陽極氧化鋁製備染料敏化太陽能電池之半導體電極。在陽極氧化鋁膜製作上，會在鍍膜過程中添加鈦黏著層以及氧電漿表面處理，增強鋁與ITO間之接著性，並比較有無處理之間的差異，並探討不同電壓與擴孔時間對陽極氧化鋁膜表面孔洞型態的影響。製作完成的陽極氧化鋁膜，會以電泳沉積法填充二氧化鈦粉末，並將試片製作成染料敏化太陽能電池以測量效率。 研究結果顯示，介於ITO與陽極氧化鋁膜間之鈦黏著層有助於ITO/陽極氧化鋁層間之結合力，氧電漿表面處理會更進一步加強其黏著效果，實驗中沒有同時具備這兩過程的試片無法完成陽極氧化反應。另一方面，薄膜式陽極氧化鋁膜之孔洞密度會隨著處理電壓上升，但其可以成功產生孔洞電壓的控制範圍較較厚鋁片的範圍小；本實驗將陽極氧化鋁膜試片以電泳填充法填充二氧化太粉末製作成染料敏化太陽能電池的電極，製作出之電池效率約為0.028%。

In this study, we developed a series of semiconductor electrodes of DSSC(dye-sensitized solar cells) by using the ultra thin AAO(anodic alumina oxide) nanoporous membranes. Titanium adhesive layer and oxygen plasma surface treatment are added to the coating process, to enhance the adhesion between the aluminum and ITO layers. We also studied the influence of the AAO membrane surface morphology on different anodic oxidation treatment condition. In the fabricating of the electrodes, titanium dioxide powder is filled into AAO membranes by electrophoretic deposition method. The study showed that titanium layer did enhance the adhesion between ITO and AAO layer, and the oxygen plasma surface treatment further enhance its adhesion again. The anodic oxidation treatment cannot be done without these two processes. On the other hand, the pore density of the anodic alumina membranes increases with the anodic voltage. Compared with the thicker aluminum films, however, the range of the voltage that can successfully produce a porous layer is much narrow. Finally, we successfully fabricate DSSC with nanoporous AAO electrode, with the conversion efficiency of 0.028%.