水熱法製作TiO2奈米結構光陽極於染料敏化太陽能電池之應用

Study of TiO2 Nano-structures Photo-anodes by Hydrothermal Method in Dye Sensitized Solar Cell Application

謝伯昇(Pa-Sheng Hsieh)

指導教授 ： 劉文仁

義守大學/理工學院/材料科學與工程學系/碩士(2014年)

https://doi.org/10.6343/ISU.2014.00113

摘要

本研究目的主要乃利用水熱法製備奈米結構化之二氧化鈦膜層，作為染料敏化太陽能電池元件的光電極，並探討其微觀結構與元件光電轉換效率間之關係。膜層前驅物使用藥品為鹽酸、去離子水及異丙醇鈦之混和溶液，並在無添加任何表面活性劑下，只透過四種參數的調變來完成染敏電池光陽極的鍍膜實驗。至於調變的參數主要為四大項，分別為鹽酸比系列、時間比系列、濃度比系列以及溫度比系列，並直接於水熱中鍍附於FTO基板上，所生長出的結構多為金紅石結構。藉由這些參數系列的研究可以發現：濃度對於整體製程具有最大的影響，其對於整體結構所帶來的影響為使膜層變厚以及形貌上的改變；而鹽酸比例則影響形貌；至於時間比例與溫度比例則影響膜厚。而我們還有透過以上的參數作延伸應用，便是執行多步驟的製程。
　　至於元件光電特性研究方面，透過參數的調變，我們以多段式的製程上能有較好的光電轉換效率為1.12%，此膜層的特性為透過多段的水熱，致使底部柱狀結構獲得增長，並藉由底部柱狀結構的伸長，能使元件特性中之開路電壓值有所提升。本研究對於元件特性中之開路電壓值的增加有所貢獻，同時也對於無添加表面活性劑下奈米結構化之二氧化鈦膜層的生長機制進行深入之探討。

關鍵字

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並列摘要

The purpose of this work is to use hydrothermal method for synthesizing titanium dioxide (TiO2) nanostructures as dye-sensitized solar cell of the photo-anodes and discussing the relationship between microstructure and photovoltaic conversion efficiency. The precursors which solution mixed with hydrochloric acid (HCl), DI water, titanium isopropoxide (TTIP) and without the addition of surfactant were adopted to form the TiO2 film. The photo-anodes of dye sensitized solar cells (DSSCs) were studied by four core parameters, included ratios of hydrochloric acid, deposition times, TTIP concentrations and deposition temperatures. It was found that the deposited titanium dioxide (TiO2) nanostructures on fluorine-doped tin oxide (FTO) substrates with rutile crystallized phases. From a series of core parameters experiments, it revealed TTIP concentrations had the greatest impact on the structures and morphologies of TiO2 nanostructures. The proportions of hydrochloric acid could only affect the morphologies of TiO2 nanostructures. However, the deposition times and temperatures could influence the thickness of TiO2 nanostructures. We performed an extended experiment called multi-step processes to synthesize TiO2 nanostructured films via different hydrothermal methods.
　The optical characteristics for DSSCs devices with photo-anodes by multi-step processes deposition indicated the photoelectric conversion efficiency could be up to 1.12%. The photo-anodes of the optimal TiO2 nanostructures possessed nano-rods structure in the bottom layer and improve the Voc values by increasing the length of nano-rods might be the greatest contribution in this research. At the same time, we have deeply studied the growth mechanism of titanium dioxide (TiO2) nanostructures by hydrothermal method without surfactant.

並列關鍵字

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參考文獻

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[64].林承賢，二氧化鈦摻釩的薄膜電極應用於染料敏化太陽能電池之研究，國立台南大學，2008年。

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