披覆含有共軛樹枝狀寡噻吩配位子之釕金屬複合物的氧化鋅奈米粒子之合成與應用

Abstract

本論文中，首先我們利用Stille coupling reaction合成了三個擁有軟鏈分枝的樹枝狀寡噻吩分子(branched oligothiophene dendrons)，並將三個樣品命名為一代(3T)、二代(7T)及三代(15T)；將此系列分子與4’-(5-Bromothiophene) -2,2’,6’,2’’- terpyridine同樣藉由Stille coupling reaction作結合(分別命名為G1、G2、G3)，以便可由釕金屬(Ru)形成有機-無機金屬配位鍵，最後連接在已經有另一個具有矽氧烷基之Terpyridine分子(Terpy)修飾在氧化鋅奈米粒子表面(~5 nm ZnOnanoparticle)； 此系列奈米複合材( G1,2,3–Ru-Terpy- ZnO)的吸附鑑定、吸附程度及光物理性質探索，可由1H-NMR、FT-IR、TGA、UV-vis、PL 及TEM進行研究及探討。此類奈米複合材料擁有良好的光導電荷傳輸及可溶一般溶劑(如THF…)的良好溶解特性，但其不易成膜的特性，易造成光電轉換效率偏低，因此成為仍須克服的問題。將此類型奈米複合材料應用在太陽能電池上，因不具結晶態，故利用旋轉塗佈的方式製成薄膜，在AM 1.5的標準太陽光照射下，元件效率可達到η=0.047 %，Jsc= 0.629 mA/cm2、Voc= 0.30 V、FF= 0.25。

In this reaserch, we synthesized three compound of branched oligothiophene dendrons by Stille coupling reaction,and denominated 3T,7T and 15T respectively.In the same way,we utilized dendrons to link with 4’-(5-Bromothiophene) -2,2’,6’,2’’- terpyridine by Stille coupling reaction.We named G1、G2 and G3 respectively.Finally,we utilized Ru to make G1、G2 and G3 combine with ~5nm ZnO nanoparticle which modified with Terpy. Futhermore, the identification and amount of absorbent on ZnO nanoparticle as well as the investigation of photophysical properties were reaseached by 1H-NMR、FT-IR、TGA、UV-vis、PL and TEM. This kinds of nanocomposites are very soluble in some general solvents,for instanc -e,THF…and exhibit photoinduced charge-transfer interactions between the two species.But the thin-film performance of these nanocomposites were not very good.It caused that the performances of the photovoltaics is not very well. These three types of the nanocomposites were non-crystalline, so we investigated the potential use of the nanocomposites in bulk heterojunction solar cells by spin coating. Under the standard AM 1.5G, the power conversion efficiency has been up to η= 0.047 %(Jsc= 0.629 mA/cm2、Voc= 0.30 V、FF= 0.25.)