用于具有高开路电压的聚合物太阳能电池的三氟甲基取代的大带隙聚三苯胺
Trifluoromethyl-Substituted Large Band-Gap Polytriphenylamines for Polymer Solar Cells with High Open-Circuit Voltages.
作者信息
Yi Shuwang, Deng Wanyuan, Sun Sheng, Lan Linfeng, He Zhicai, Yang Wei, Zhang Bin
机构信息
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China.
Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science & Engineering, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou 213164, China.
出版信息
Polymers (Basel). 2018 Jan 8;10(1):52. doi: 10.3390/polym10010052.
Two large band-gap polymers ( and ) based on polytriphenylamine derivatives with the introduction of electron-withdrawing trifluoromethyl groups were designed and prepared by Suzuki polycondensation reaction. The chemical structures, thermal, optical and electrochemical properties were characterized in detail. From the UV-visible absorption spectra, the and showed the optical band gaps of 2.01 and 2.07 eV, respectively. The cyclic voltammetry (CV) measurement displayed the deep highest occupied molecular orbital (HOMO) energy levels of -5.33 and -5.38 eV for and , respectively. The hole mobilities, determined by field-effect transistor characterization, were 2.5 × 10 and 1.1 × 10 cm² V S for and , respectively. The polymer solar cells (PSCs) were tested under the conventional device structure of ITO/PEDOT:PSS/polymer:PCBM/PFN/Al. All of the PSCs showed the high open circuit voltages (s) with the values approaching 1 V. The and based PSCs gave the power conversion efficiencies (PCEs) of 3.24% and 2.40%, respectively. Hence, it is a reliable methodology to develop high-performance large band-gap polymer donors with high s through the feasible side-chain modification.
通过铃木缩聚反应设计并制备了两种基于聚三苯胺衍生物且引入吸电子三氟甲基的大带隙聚合物（和）。详细表征了其化学结构、热学、光学和电化学性质。从紫外可见吸收光谱来看，和的光学带隙分别为2.01和2.07 eV。循环伏安法（CV）测量显示，和的最高占据分子轨道（HOMO）能级分别为-5.33和-5.38 eV。通过场效应晶体管表征测定的空穴迁移率，和分别为2.5×10和1.1×10 cm² V S。在ITO/PEDOT:PSS/聚合物:PCBM/PFN/Al的传统器件结构下测试了聚合物太阳能电池（PSC）。所有PSC均显示出接近1 V的高开路电压（s）。基于和的PSC的功率转换效率（PCE）分别为3.24%和2.40%。因此，通过可行的侧链修饰来开发具有高s的高性能大带隙聚合物供体是一种可靠的方法。
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