Abstract
I 摘要 本實驗將燒結的二氧化鈦轉印至可撓式導電PET基板以製備染料敏化太陽能電池。首先在玻璃表面旋塗一層聚苯乙烯球，再使用刮刀法塗佈二氧化鈦漿料於球層上，將二氧化鈦/聚苯乙烯球/玻璃放入高溫爐中以450oC在空氣中處理30分鐘，成為燒結的二氧化鈦膜。另一方面，使用導電碳膠、導電銀膠、刮刀法二氧化鈦與電泳二氧化鈦為中介層，提高基板與燒結後的二氧化鈦間的附著力，並使用輕壓或摩擦轉印將燒結後的二氧化鈦膜轉置其上，形成燒結二氧化鈦/中介層/ITO/PET結構。 使用不同中介層的陽極製備可饒式染料敏化太陽能電池，並以太陽光模擬燈量測染料敏化太陽能電池的光電轉換效率，及以電化學阻抗譜儀量探討結構對性能的影響。結果發現，本研究可成功將燒結的二氧化鈦轉印至二氧化鈦中介層/ITO/PET上，且以此製程所得的染料敏化太陽能電池之光電轉換效率為0.75 %；當直接以130oC、100 MPa處理一分鐘的刮刀法二氧化鈦為電極時，即使未經燒結其光電轉換效率亦可提升至1.19 %，此兩種方法的比較將在文章中討論。 II Abstract This work reports a method to transfer sintered TiO2 onto ITO/PET flexible electrode for fabricating dye sensitized solar cells. At the first step, TiO2 film, prepared by the doctor-blade (DB) method, was coated onto a glass substrate coated with polystyrene spheres; afterward the as-prepared TiO2/polystyrene sphere/glass was sintered at 450oC in air for 30 min. During the transferring process, various intermediate layers, namely conductive carbon tape, conductive silver paste, EPD TiO2, and DB TiO2 were used to enhance the adhesion between ITO/PET substrate and sintered TiO2 film. The sintered TiO2 was then transferred onto the intermediate layer via a simple pressing (or friction- transfer) method to form TiO2/intermediate layers/ITO/PET structure. The current-voltage characteristic and the Nyquist plots of the DSSCs device were measured by solar simulator and electrochemical impedance spectroscopy (EIS), respectively. The proposed method successfully transferred sintered TiO2 on intermediate layers/ITO/PET. The energy conversion effeciency of this device was 0.75 %. Even without sintering, the energy conversion efficiency of the DB TiO2 electrode can be enhanced to 1.19 %, after heat treatment at 130oC under a pressure of 100 MPa for 1 minute.