利用蒸發誘導式自組裝法製備二氧化鈦及其複合物並運用在染敏化太陽能電池

Synthesis of TiO2 and TiO2-SiO2, Carbon-TiO2 Composites by Evaporation Induced Self- assembly and Their Applications in Dye-sensitized Solar Cell

吳旻聰(Min-Tsung Wu)

指導教授 ： 周大新

國立臺灣大學/理學院/化學研究所/博士(2014年)

https://doi.org/10.6342/NTU.2014.00279

摘要

利用蒸發誘導式自組裝法製備二氧化鈦、二氧化鈦與二氧化矽複合物、二氧化鈦與碳複合物。第一個部份本研究以簡易自組裝法並以triton X-100當介面活性劑模板，titanium (IV) isopropoxide為鈦的來源且改變Ti/H2O 莫耳比例可合成出可調控直徑的球狀二氧化鈦。其直徑分別為500 nm, 700 nm, and 1100 nm且命名為TiO2-500、TiO2-700 以及TiO2-1100。並且將其運用於染敏化太陽能電池的工作電極，其電極第一層塗佈商業化二氧化鈦吸附層(P25)第二層分別塗佈TiO2-500、TiO2-700 以及TiO2-1100為反射層製成雙層元件。
第二部分以相同簡易自主裝法並以titanium (IV) isopropoxide 與tetraethoxysilane分別為鈦以及矽的來源合成出二氧化鈦與二氧化矽複合物。另一方面以碳的寡聚體取代矽源合成出二氧化鈦與碳的複合物。分別將兩種複合物運用在染敏化太陽能電池工作電極中以及對電極。其中二氧化鈦與二氧化矽複合物光電轉換效率已達7.92﹪。

關鍵字

利用蒸發誘導式自組裝法 ； 染敏化太陽能電池 ； 二氧化鈦

並列摘要

The size tunable TiO2 sphere, SiO2-TiO2 composite and C-TiO2 composite were synthesized via a simple evaporation induced self-assembly (EISA) process. First, We report a simple method for the preparation of the size tunable TiO2 sphere from titanium (IV) isopropoxide and nonionic surfactant colloids (triton X-100) as the template. The synthetic procedure is easy to control by changing the Ti/H2O ratios in the process of evaporation-induced self-assembly. We are able to tune the size of sphere TiO2 particles with diameters of 500 nm, 700 nm, and 1100 nm, named as TiO2-500, TiO2-700 and TiO2-1100. They are suitable for the fabrication of DSSCs with a comparable efficiency to the commercial photocatalyst P25. The three different TiO2 sphere size were applied as a scattering overlayer on a transparent nanocrystalline TiO2 film, bi-layered dye-sensitized solar cells (DSSCs) have been fabricated.
In second part, SiO2-TiO2 composite has been reported, which uses nonionic surfactant colloids (triton X-100) as the template as a template, a titanium (IV) isopropoxide and Tetraethoxysilane as a titanium and silica source by evaporation-induced self-assembly. The SiO2-TiO2 composite can be easily shaped. The synthesized SiO2-TiO2 composite were then applied as the as a scattering overlayer on a transparent nanocrystalline TiO2 film, bi-layered dye-sensitized solar cells (DSSCs) have been fabricated. As a result the photovoltaic conversion efficiency (η) of DSSC was improved with our materials. In addition, we synthetize C-TiO2 composite by the same method. It has been investigated as a counter electrode for dye-sensitized solar cells.

並列關鍵字

Evaporation Induced Self- assembly ； Dye-sensitized Solar Cell ； TiO2

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