本研究係利用一種含有NH2官能基的矽烷改質劑(APS)將奈米級二氧化鈦進行表面改質後，再與染料苝四甲酸二酐(PTCDA)繼續反應，增加二氧化鈦可見光吸收特性。多環類的PTCDA具有大型平面電子共振結構，具有優異光電性質且有很高的裂解溫度，可以應用在液晶材料、PLED及太陽能電池方面，但因其溶解度限制，故其不易加工運用。本實驗利用以APS改質後之二氧化鈦直接與PTCDA反應.反應完成後，進一步經由FT-IR、Solid state NMR、BET、XRD、TGA、UV-Vis光譜、TEM等儀器分析所製備材料之化學結構與性質，並利用亞甲基藍在可見光下的降解，判定製備出之TiO2-PMI具有光催化活性。最後利用此材料及簡單的設備製程應用於有機太陽能電池製成元件，並與未修飾之二氧化鈦作比較。結果發現光電流均較未修飾的高。我們發現此材料在可見光下具有光催化活性，可作為染料敏化太陽能電池電極，提供了可應用於染料敏化太陽能電池材料的另一種替代材料與發展的途徑。

In this study, coupling reagent APS modified nano-sized TiO2 were prepared, and then reacted with PTCDA to prepare new material TiO2-PMI. Because of the advantages of polycyclic PTCDA contained the large-scale plane electron resonance structure, the good photoelectric properties and high cracking temperature. It could be applied in Liquid Crystal material, PLED and Solar cell aspect, but poor solubility limits its application. This new material TiO2-PMI was characterized by FT-IR、Solid state NMR、BET、XRD、TGA、UV-Vis spectra、TEM and approved it can be catalyzed in the visible light. Apply this new material we synthesis and easy process to DSSC device and compared with unmodified TiO2, result in better efficiency. This study approved this new material can be applied in DSSC and provided a new way to develop the material of DSSC.

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