Self-Assembled Conjugated Diblock Copolymers as Promising Materials for Organic Photovoltaics

• 作 者: Chen Wei-Chih Lee Yi-Huan Chen Chia-Yuan Kau Kuo-Chang Lin Lu-Yin Dai Chi-An Wu Chun-Guey Ho Kuo-Chuan Wang Juen-Kai Wang Leeyih
• 机 构: InstituteofPolymerScienceandEngineering;NationalTaiwanUniversity,Taipei,10617DepartmentofChemicalEng
• 出 处: 2014 年两岸三地高分子液晶态与超分子有序结构学术研讨会暨第十三届全国高分子液晶态与超分子有序结构学术论文报告会
• 发表日期: 2014年8期

Block copolymers have attracted considerable research interest from both academia and industry because they can self-organize into a variety of highly ordered structures with characteristic lengths ranging from nanometers to micrometers.In the current study,we synthesized a highly asymmetric block copolymer,poly(2,5-dihexyloxy-p-phenylene)-b-poly(3-hexylthiophene) (PPP-b-P3HT),wherein the major component - a P3HT block - has a strong π-stacking interaction that may significantly influence the molecular assemblyability of the overall copolymer system.Therefore.this copolymer is characterized by an enhanced crystallinity,enabling its P3HT component to pack into interpenetrated and long-range ordered crystalline fibrils upon spin-drying and ultimately endowing itself to have a faster hole mobility than that of the parent P3HT homopolymer.Moreover.as such block copolymer is applied as the hole transport material (HTM) ofsolid-state dye-sensitized solar cells (ss-DSCs),the PPP block facilitates an intimate contact between the copolymer and dye molecules absorbed on the nanoporous TiO2 layer,largely increasing the efficiency of dye regeneration andthereby significantly enhancing the performance of the device.