Effects of Annealing Temperature of TiO2 Thin Films for Application in dye-sensitized Solar Cells

燒結溫度對於二氧化鈦染料敏化太陽能電池之影響

10.29548/BGYY.201103.0008

高銘政(Ming-Cheng Kao)

二氧化鈦 ； 溶膠凝膠法 ； 染料敏化太陽能電池 ； 短路電流 ； 開路電壓 ； TiO2 ； sol-gel ； dye-sensitized solar cells ； short-circuit current ； open-circuit voltage

修平學報

22期（2011 / 03 / 01）

125 - 133

英文

本論文以溶膠－凝膠法製作二氧化鈦薄膜，並作為染料敏化太陽能電池之工作電極，研究不同燒結溫度(400~700℃)對於二氧化鈦薄膜之微結構、表面型態及光學特性等影響，藉由XRD繞射儀、電子式掃瞄顯微鏡(SEM)及比表面積分析儀(BET)等儀器量測染敏太陽電池之二氧化鈦工作電極相關物理特性。實驗結果顯示，隨著燒結溫度的增加，二氧化鈦薄膜的孔隙度及比表面積也會增加，並且改善二氧化鈦表面之染料N3吸附量及光電轉換效率，同時在太陽能電池之特性方面，當燒結溫度700℃時，可以得到較高之短路電流、開路電壓及轉換效率，分別為5.6 mA/平方公分、0.65 V及1.57%。

TiO2 thin films have been deposited on FTO-coated glass substrates using sol-gel technology for application as the work electrode for the dye-sensitized solar cells (DSSC). The effects of annealing temperature (400~700℃) on the microstructure, morphology and optical properties of TiO2 thin films were studied. The electrode of DSSC fabricated with TiO2 thin films were characterized by X-ray diffraction (XRD), scanning electron microscopic (SEM) and Brunauer-Emmett-Teller (BET) analysis. Based on the results, the TiO2 films annealed at 700℃ shows better crystallization, higher porosity and surface area than those of TiO2 films annealed at lower temperature. The higher efficiency (η) of 1.57% with J(subscript sc) and V(subscript ∝) of 5.6 mA/cm^2 and 0.65 V, respectively, was obtained by the TiO2 film annealed at 700℃.

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