改良電化學製程製備二氧化鈦奈米管應用於染料敏化太陽能電池之研究

Abstract

本研究以原有電化學法製備二氧化鈦奈米管進行改良。將純度鈦薄板(99.7%)為陽極，鉑(Pt)為陰極，於氟化銨(Ammonium Fluoride, NH4F)及去離子水(Deionized water, DI water)為溶質，乙二醇(Ethylene Glycol, EG)為溶劑所調配之電解液。改變工作溫度、NH4F濃度及電壓與時間之電化學參數，所製備出二氧化鈦奈米管改善製程上的管長，以助於染料敏化太陽電池的效率提昇。接著使用N719染料為染料光敏化劑，以入射光強度為100 mW/cm2情況下，當管長為24.1 μm時，其短路電流Jsc為11.50 mA/cm2、開路電壓Voc為0.75 V、填充因子FF為0.48、轉換效率η為4.21%，為目前實驗測得最高效率之結果。In this study, the major purpose had improved original process of electrochemical method for making TiO2 nanotubes. It is manufactured by electrochemical method with electrolyte which mix for solution with ammonium fluoride (NH4F), ethylene glycol (EG) and DI-Water. Therefore, high purity titanium (99.7%) and platinum as anode and cathode are electrolyzed in electrolyte. The experimental parameters are changing operating temperature, NH4F concentration and voltage-time that improve to prepare TiO2 nanotubes for dye-sensitized solar cells application. Then, sensitizing use N719 dye and expose to light which light intensity is 100 mW/cm2. Finally the length of 24.1 μm is measured Jsc = 11.50 mA/cm2, Voc = 0.75 V, FF = 0.48 and η = 4.21% that is highest efficiency.