陽極處理法製備染料敏化太陽能電池中光電極薄膜之研究

本論文研究目的是以陽極處理法製備染料敏化太陽能電池(Dye sensitized solar cell)中的光電極薄膜並探討其背向照光與正向照光二氧化鈦奈米管的結構及特性與光電轉換效率之間的影響。首先，背向照光元件是以鈦箔片(99.5 %)為陽極，置於乙二醇(Ethylene Glycol，EG)、氟化銨(Ammonium Fluoride，NH4F)和去離子水(Deionized Water，DI)混合的電解液中，接著以定電壓的方式進行陽極處理，製備出二氧化鈦奈米管(TiO2 nanotubes)，做為光電極的薄膜。為了提高奈米管的比表面積，我們利用正丁氧基鈦(TnB)後處理沉積奈米粒子於奈米管上，經由實驗結果顯示，以背向照光之染料敏化太陽能電池在二氧化鈦奈米管管長22 μm時其光電轉化效率達3.53 %。正向照光元件是以薄膜轉移法來製備，首先透過定電壓60 V陽極處理10小時成長管長22 μm的二氧化鈦奈米管薄膜，經過450 ℃之熱處理後，再以定電壓20 V進行二次陽極處理5小時，將剝落下來的薄膜透過黏著劑黏著於FTO導電玻璃上，經由TnB後處理後，實驗結果顯示，以正向照光之染料敏化太陽能電池其光電轉換效率為4.63 %。此外，本研究將二氧化鈦奈米管薄膜以二次陽極處理法取下後，以研缽磨成粉末，以適當的比例混入二氧化鈦奈米顆粒中，利用旋轉塗佈機塗佈於FTO導電玻璃上，經過450 ℃之熱處理後，將試片浸泡染料24小時，再以三明治方式製備成奈米管混雜奈米顆粒的正向照光元件，經由實驗結果顯示，以奈米管混雜奈米顆粒的正向照光元件其光電轉換效率可達6.14 %。

關鍵字

二氧化鈦奈米管；陽極處理法；染料敏化太陽能電池

並列摘要

This research aims to preparation of photoelectrode film for dye sensitized solar cell by anodization method. The structure of back-illuminated and front-illuminated titanium dioxide nanotubes are disscussed. Additionally, the influence between the properites of titanium dioxide nanotubes and photon-electron conversion efficiency are invesgated in this research. At first, the titanium foil (99.5 %) is the anode of the back-illumination cell. Then, put it in the electrolyte that mixed with ethylene glycol (EG), ammonium fluoride (NH4F) and deionized water (DI). The preperation of TiO2 nanotubes for photoelectrode film is under constant voltage in anodizing process. In order to increase the specific surface area of the nanotubes, the nanoparticals are deposited on the nanotubes through the post-processing of TnB. The experiments result shows that photon-electron conversion efficiency has reached to 3.53 % when the lengh of nanotube is 22 μm. The front-illumination cell is prepared by film transfer method. The film of TiO2 nanotubes is under anodizing and constant voltage 60 V for 10 hours to grow the length of nanotube to 22 μm. Then, the second anodization is under constant voltage 20 V for 5 hours after a thermal treatment in 450 ℃. The peeled films are cohered on Fluorine-doped tin oxide(FTO) conductive glass. After thermal annealing of TnB, the experiments results show that photon-electron conversion efficiency of front-illumination dye sensitized solar cell has reached to 4.63 %. Additionally, the film of TiO2 nanotubes is removed under second anodization and powdered. Then, it is mixed with nanoparticles in appropriate proportion and coated on FTO conductive glass by spin coater. After a 450 ℃ thermal treatment, the specimens are soaked in dyes for 24 hours and prepared to front-illumination cell that mixed with nanotubes and nanoparticles. The experiments results show that photon-electron conversion efficiency of mixed with nanotubes and nanoparticles of front-illumination dye sensitized solar cell has reached to 6.14 %.

並列關鍵字

TiO2 nanotube ； Anodizing method ； Dye-sensitized solar cell

參考文獻

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陽極處理法製備染料敏化太陽能電池中光電極薄膜之研究

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