基于PCPDTBT复合材料的制备及光致电荷转移  

PREPARATION AND PHOTO-INDUCED CHARGE TRANSFER OF COMPOSITES BASED ON PCPDTBT

作　　者：邓丹[1] 施敏敏[1] 陈飞[1] 李海国[1] 汪茫[1] 陈红征[1] 

机构地区：[1]浙江大学高分子科学与工程学系高分子合成与功能构造教育部重点实验室硅材料国家重点实验室,杭州310027

出　　处：《高分子学报》2009年第8期790-795,共6页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号50520150165;50403022;20774083);浙江省自然科学基金(基金号Y407101);教育部长江学者和创新团队发展计划(项目号IRT0651)资助项目

摘　　要：合成了PCPDTBT,通过NMR,GPC等方法对聚合物进行了表征.研究了聚合物的热学与电化学性质.采用溶液法将电子给体PCPDTBT与两种电子受体1-(3-甲氧基羰基)丙基-1-苯基[6,6]C61(PCBM)和ZnO纳米粒子分别进行了复合,通过研究复合前后的荧光变化,确认了给体-受体两相界面间发生了由分子能级差引发的光致电荷转移.这些研究结果为探索性能更佳的有机太阳能电池材料体系提供了重要的参考依据.Poly [ 2, 6-（4, 4-bis-（ 2-ethylhexyl ）-4H-cyclopenta [ 2, 1-b; 3,4-b ] dithiophene）-ah-4, 7-（ 2, 1,3- benzothiadiazole） ] （PCPDTBT） is a new kind of low band-gap polymers for applications in organic photovohaic devices. However, PCPDTBT was studied as the donor to form the photoactive composites only with organic acceptors （fullerene derivatives） so far. In this article, PCPDTBT was synthesized, and its chemical structure, thermal stability and energy levels were identified and characterized by NMR, GPC, TGA, and CV, respectively. Furthermore, the composites of PCPDTBT with two electron acceptors of 1 - （ 3-methoxycarbonylpropyl ） - 1 -phenyl [ 6,6 ] C61 （ PCBM ） and ZnO nanoparticles were prepared by solution-blending. Both composites showed fluorescence quenching, indicatingthat the photo-induced charge transfer occurred due to the energy level offset between the donor PCPDTBT and the acceptor. Nevertheless, from the SEM images of the two composites, it was disclosed that PCBM molecules were well dispersed all over the PCPDTBT- PCBM composite whereas ZnO nanoparticles aggregated to some extent in the PCPDTBT-ZnO composite, leading to a more effective photo-induced charge transfer between PCPDTBT and PCBM.

关 键 词：PCPDTBT ZNO纳米粒子 电荷转移 荧光淬灭 

分 类 号：O631.3[理学—高分子化学]