以溶膠凝膠法製備多孔二氧化鈦薄膜電極之染料敏化太陽能電池之研究

Study of porous TiO2 electrode by sol-gel for dye-sensitized solar cell

謝易宏(Yi-Hung Hsieh)

指導教授 ： 林俊良

共同指導教授 ： 甘廣宙(Kwang-Jow Gan)

崑山科技大學/工程學院/光電工程研究所/碩士(2010年)

摘要

本研究利用溶膠-凝膠法(sol-gel method)製備染料敏化太陽能電池多孔二氧化鈦 (TiO2) 薄膜電極，主要之研究項目有： ( I ) 探討不同鍛燒溫度參數，( II ) 探討鍛燒對染料吸附後特性之影響，( III ) 探討不同厚度對染料敏化太陽能電池效率之影響， (IV) 探討不同染料對染料敏化太陽能電池效率之影響。
經由XRD與SEM鑑定可知二氧化鈦薄膜在不同溫度下皆呈現銳鈦礦(Anatase)與金紅石(Rutile)結晶相，且隨著厚度增加，其XRD強度也隨之上升。二氧化鈦薄膜為多孔狀結構，其粒徑大小隨著鍛燒溫度的增加而增加(40.3 ~ 74.5 nm)。
由UV-VIS光譜儀分析後得知，隨著薄膜厚度的增加，其穿透率隨之降低；此外，浸泡染料後，其光吸收波長明顯的往可見光移動。
由效率量測結果顯示，以不同鍛燒溫度對光電轉換效率的影響，隨著鍛燒溫度的上升，其效率有往上提升的趨勢(0.11 ~ 0.16 %)；而厚度的增加對光電轉換效率也有提升的趨勢(0.14 ~ 0.16 %)；此外，將染料改為N719染料，有助於光電轉換效率提升(0.14 ~ 0.17 %)；將奈米碳管( CNT )應用於染料敏化太陽能電池，探討其對電池的影響。

關鍵字

二氧化鈦 ； 染料敏化太陽能電池 ； 溶膠-凝膠法

並列摘要

Study on the porous TiO2 electrode by sol - gel method for Dye-sensitized Solar Cell. The main research projects: ( I )The different annealing temperature parameters, ( II ) Effects of annealing conditions on the dye adsorption properties, ( III ) The effects of the thickness of TiO2 films on the performance for dye-sensitized solar cells ( IV ) The adsorption properties of different Sensitizer dye on porous TiO2 films for dye-sensitized solar cells.
The XRD patterns and SEM result shows that the TiO2 films show an anatase and rutile phase with the preferred (101) orientation. As the film thickness was increased, the peaks of the (101)-plane for samples became sharper indicating better crystallinity with increasing film thickness. The estimated crystallite size of the films annealed at 300 °C was about 40.3 nm and increased to 74.5 nm after annealing at 600 °C
By the UV-VIS spectrometer analysis, the transmittance of the films becomes lower as the films actually become thicker. In addition, the absorbance shifts to visible light while the porous TiO2 after immersing with dye.
From I-V results, the efficiency of photoelectric conversion increases with annealing temperature from 0. 11 % up to 0.16 %.With increasing the thickness of TiO2 thin films from 1.7 μm to 3.11 μm, the values of photoelectric conversion efficiency of DSSC increased from 0.14 to 0.16%.In addition, the dye be replaced by N719 dye helps enhance the photoelectric conversion efficiency from 0.14 to 0.17 %; the carbon nanotube (CNT) using in dye sensitized solar cells, to explore its impact on the cell.

並列關鍵字

TiO2 ； dye-sensitized solar cell ； sol-gel method

參考文獻

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