设计合成了两种D-A型共轭聚合物给体材料PBDT-BT, PBDT-FBT,研究了引入氟原子后,双直链噻吩修饰的苯并二噻吩共轭聚合物的热力学,光学,电学性质与光伏性能的变化。以聚合物/PC71 BM作为活性层材料,研究了不同比例的给体受体对有机太阳能电池光伏性能的影响。两种聚合物热力学分解温度均超过了400℃,同时表现出不错的吸光能力。较低的HOMO能级使得PBDT-BT与PBDT-FBT的开路电压均超过了0．85 eV,通过器件结构ITO/PEDOT： PSS/Active Layer/Ca/Al,优化得到的光伏性能分别为2．42%与3．55%。%Two donor-acceptor ( D-A) types of conjugated polymers were synthesized through palladium-catalyzed stille polymerization. The change of thermodynamic, optical, optoelectronic and photovaltic properties was investigated when incorporating the fluorine atom into the dialkythio-substituted BDT-based polymers. With the polymer/PC71 BM as active layer, the ratio of donor/acceptor was studied how to influence the performances of polymer solar cells. The resulting polymers exhibited excellent thermal stability with decomposition temperature up to 400 ℃ and a broad absorption spectrum. The low HOMO energy level leaded to a high Voc over 0. 85 eV. PBDT-BT and PBDT-FBT based on an device configuration of ITO/PEDOT: PSS/Active Layer/Ca/Al showed good photovoltaic performances with power conversion efficiency of 2. 42% and 3. 55% respectively.
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