二氧化鈦工作電極的製程改善與染料敏化太陽能電池的應用

Process Improvement and Characterization of TiO2 Working Electrode for Dye-sensitized Solar Cells

柳宜政(Yi-Cheng Liu)

指導教授 ： 蘇昭瑾

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2010年)

摘要

染料敏化太陽能電池(DSSC)具有低成本、不需精密製程設備及可撓曲等優點，近年來成為學者研究的焦點。多孔性二氧化鈦薄膜電極對於DSSC元件表現是非常重要的。本研究是將二氧化鈦漿料利用旋轉塗佈(Spin coating)、刮刀法(Doctor blade)及網版印刷(Screen printing)法在導電玻璃上製備多孔性二氧化鈦薄膜，以研究不同製備工作電極方式對DSSC的效率表現。
第一部分，以正四丁基氧化鈦(Ti(n(C4H9O))4)為前驅物，利用水熱法合成製備出的銳鈦礦(A-TiO2)及金紅石(R-TiO2)二氧化鈦。將兩種晶相之二氧化鈦以8比2(A8R2)比例作摻混與商業化二氧化鈦Degussa P-25(DP-25)比較，利用旋轉塗佈(Spin coating)法在導電玻璃上製備成工作電極。實驗結果發現，A8R2元件最佳的光電轉換效率可達5.350 %。
第二部分，將銳鈦礦二氧化鈦(A-TiO2)、乙基纖維素(Ethyl cellulose)及松油醇(Terpineol)在乙醇中混合所製備出的二氧化鈦漿料，利用刮刀法(Doctor blade)製備成工作電極，再使用兩種大顆粒二氧化鈦分別為商業化QF-Ti-1125F(S-TiO2)和本實驗室自行合成的花狀二氧化鈦Flower-like(Flo-TiO2)分別為當作散射層，經實驗結果發現，其光電轉換效率可以從原本的7.020 % (A-TiO2)提升到8.530 % (A-TiO2加上S-TiO2)、8.059 % (A-TiO2加上Flo-TiO2)。
第三部分、將製備好之銳鈦礦二氧化鈦(A-TiO2)漿料，利用網版印刷(Screen printing)法製備成不同層數的工作電極，經實驗結果發現，印刷9層的膜厚為14.5 μm，光電轉換效率可達到7.194 %。

關鍵字

二氧化鈦 ； 鋭鈦礦 ； 金紅石 ； 散射層 ； 網版印刷 ； 染料敏化太陽能電池

並列摘要

Dye sensitized solar cells (DSSCs) have a hracted much attentions due to possibilities of low fabrication cost, no need for elaborate apparatus to manufacture and flexibility. For the performance of dye-sensitized solar cells (DSSCs), the porous TiO2 thin film electrode is very important. In this work, a spin coating, doctor-blade and screen-printing technique were used to fabricate nano-porous TiO2 films by coating a TiO2 paste onto a transparent conductive glass. The Study is aimed at fabricating different working electrode to infuence the performance of dye-sensitized solar cells (DSSCs)。
Part I. The Anatase TiO2 (A-TiO2) and Rutile TiO2 (R-TiO2) nanoparticles were prepared by hydrothermal method using titanium (IV) n-butoxide as the precursor and acetic acid hydrochloric acid repectively as a peptizer. The investigation of photo-electron conversion efficiency of DSSCs fabricated from mixed-TiO2 with A-TiO2 and R-TiO2 ratio of 80:20 (A8R2) was performed and compared to that from commercial TiO2 (Degussa P-25). TiO2 samples were deposited on FTO coated glass substrates by spin-coating technique. The best-efficiency obtained in this work is 5.350 % from A8R2 cell.
Part II. In this work, a doctor-blade technique was used to fabricate nano-porous TiO2 films by coating a TiO2 paste onto a transparent conductive glass. The TiO2 paste was prepared by mixing ethyl cellulose, terpineol in ethanol, and anatase TiO2 nanoparticles (A-TiO2). Then two different TiO2 particles of QF-Ti-1125F(S-TiO2) and Flower-like (Flo-TiO2) were used for a scattering overlayer for A-TiO2 main-layer. While the conversion efficiency of the main-layer (A-TiO2) is slightly improved from 7.020 % to 8.530 % and 8.059 % when S-TiO2 and Flower-like TiO2 particle overlayers are introduced.
Part III. In this work, a screen-printing technique was used to fabricate different layer nano-porous TiO2 films by coating a TiO2 paste onto a transparent conductive glass. While the best-efficiency obtained in this work is 7.194 % from 9 layers A-TiO2 cell with TiO2 film thickness of 14.5 μm.

並列關鍵字

Titanium Dioxide ； Anatase ； Rutile ； Scattering layer ； Screen printing ； Dye-sensitzed solar cell

參考文獻

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