磷鎢酸添加於二氧化鈦奈米管應用於染料敏化太陽能電池之研究

Abstract

隨著科技日新月異、工業發展的擴張，世界用電量大幅度提高，太陽能電池的發展也更加重要，也成為未來永續發展的能源趨勢之一。而在太陽能電池中，染料敏化太陽能電池具備發電門檻低、環保、低成本及可撓輕量化等四大優勢，為一具有潛力之太陽能電池。染料敏化太陽能電池之光電轉換效率與光電極息息相關，光電極的材料、形貌、厚度等皆會影響到整體效率。本研究係利用二氧化鈦奈米管作為光電極，製備之二氧化鈦奈米管，觀察其形貌、管長、晶體結構等性質，並添加磷鎢酸探討添加不同濃度之磷鎢酸對二氧化鈦奈米管所造成的影響。其各項性質分析使用掃描式電子顯微鏡（Scanning Electron Microscope，簡稱SEM）、X-Ray繞射分析（X-ray Diffractometer，簡稱XRD）進行檢測，再以紫外-可見分光光度計（Ultraviolet–visible spectroscopy，簡稱UV-Vis）量測其吸附效果，封裝完成之染料敏化太陽能電池元件性質以電壓-電流特性曲線(I-V curve)分析、單波長光電轉換的(Monochromatic Incident Photon-to-electron Conversion Efficiency, 簡稱IPCE)進行量測。研究結果顯示，添加磷鎢酸能夠讓銳鈦礦相峰值更加明顯，且染料之吸附能力較未添加磷鎢酸時佳，光電轉換效率亦有提升。

As the expansion of industry and technology, the use of electricity has enormously increased, so does the importance of solar cell, which has become an important energy source for sustainable development in the future. Among all solar cell, dye-sensitized solar cell has lots of advantages such as, low threshold for power generation, environmental friendly, low cost, and pliability, which makes it becomes a promising solar cell.The photoelectric conversion efficiency of the dye-sensitized solar cell is closely related to photoelectrode, also, the material, shape, and the thickness of the photoelectrode will affect the overall efficiency. This paper uses TiO2 nanotubes as the photoelectrode, observing its characteristic such as, shape, length of tube, and crystal structure et cetera, and then add different concentration of phosphotungstic acid to the tube, which will cause different influences on the TiO2 nanotubes, and study for the relations. Using SEM, XRD to analyze each characteristics, UV-Vis for measuring adsorption effect, and then uses I-V curve, IPEC for the final measurement. The research shows that adding phosphotungstic acid can make the phase peak of anatase more obvious, the adsorption ability becomes better, and also enhance the photoelectric conversion efficiency.