- 學位論文
聚(三-己基噻吩)鍵結 C60之新穎材料的合成及光電性質研究
Synthesis and Optoelectronic Properties of the novel material C60-Bonded Poly(3-hexylthiophene)
摘要
本研究利用格林置換反應(Modified Grignard Metathesis)合成高立體規則度之聚(三-己基噻吩)(P3HT)，並藉由陰離子聚合法起始P3HT末端官能基後再與單體環硫乙烷反應，取出部分樣品為官能化的高分子(P3HT-CH2-CH2-SH)後，其餘部分再與 C60反應，合成出P3HT-CH2-CH2-S-C60之新穎材料。 將合成之材料利用NMR進行結構鑑定，經由光散射得知分子量；以TGA和DSC量測高分子之熱性質，發現反應後之P3HT殘餘量增加5%，Tg和Tm均有移動的現象，再利用UV-vis探究光學性質，P3HT-CH2-CH2-S-C60於330nm有出現C60之吸收峰，由循環伏安法了解電性質之改變，最後，用TEM觀察材料之表面形態，C60周遭蓋有高分子膜。 將P3HT-CH2-CH2-S-C60與P3HT依重量比例混合配成溶液，做為有機太陽能電池的主動層，藉此探討高分子材料對太陽能電池之影響。
並列摘要
This study comprises (1) the synthesis of poly(3-hexylthiophene) with high tacticity by using Modified Grignard Metathesis, (2) the functioning of the chain end by anionic polymerization and reaction with ethylene sulfide, (3) the preparation of P3HT-CH2-CH2-S-C60 by reacting with C60, and (4) the property measurement. The molecular weight and polydiversity index are measured by light scattering, and thermal properties by TGA、DSC instruments. We have found that the TGA residual of modified P3HT increases by 5% and a shift of both Tg and Td in DSC. The UV-Vis absorption spectrum shows that there is an absorption peak of P3HT-CH2-CH2-S-C60 at 330nm indicating the connection of C60 with the polymer. By cyclic voltammetry measurements, the electronic properties can be detected. Finally, C60 is found to be covered by polymer film from TEM images. The application on solar cell of this modified polymer material was explored using this material as the active layer of solar cell.