苯并三噻吩共轭聚合物的合成及其在有机光伏中的应用  

Benzotrithiophene-Based Conjugated Polymer and Application in Organic Photovoltaic

作　　者：向艳 郭景华[2,3] 李朋[2,3] 张国兵[3] 吕国强[3] 

机构地区：[1]中航华东光电有限公司,安徽芜湖241000 [2]合肥工业大学化学工程学院,合肥230009 [3]合肥工业大学光电技术研究院,合肥230009

出　　处：《功能高分子学报》2014年第2期184-188,240,共6页Journal of Functional Polymers

摘　　要：以三(二亚苄基丙酮)二钯(Pd_2(dba)_3)为催化剂,三甲苯基磷(P(o-tol)_3)为配体,4,3'-十二烷基-2,2'-联二噻吩(M1)和2,8-二溴-5-(2-己基癸基)苯并三噻吩(M2)为单体,采用Stille交叉偶联反应,合成了基于苯并三噻吩和联二噻吩单元的共轭聚合物(PBTT)。采用热重分析、紫外-可见分光光度计及电化学分析分别研究了聚合物PBTT的热性能、光学性能和电化学性能。结果表明:聚合物PBTT具有优异的热稳定性和低的最高占有轨道能级(HOMO);聚合物薄膜最大吸收峰位于469 nm,光学能带隙为2.10 eV;将聚合物与[6,6]-苯基-C_(61)-丁酸甲酯(PC_(61)1BM)共混材料作为活性层制作了本体异质结构太阳能电池器件,在模拟太阳光源AM 1.5 G 100 mW/cm^2照射条件下,该器件获得了高达1.00 V的开路电压,初步的能量转化效率为0.43%。A conjugated polymer （PBTT） based on 4,3’-didodecyl-2,2′-bithiophene （M1） and 2,8-dibromo-5-（2-hexyldecanoyl） benzotrithiophene （m^2） were synthesized by a Stille coupling reaction in the presence of tris（dibenzylidene-acetone） dipalladium （Pd2（dba）3） as a catalyst and tri（o-tolyl）phosph-ine （P（o-tol）3） as a ligand. The polymer was characterized by thermal analysis, as well as optical spectroscopy and electrochemical testing. Polymer PBTT showed excellent thermal stability, and possessed deep highest occupied molecular orbital （HOMO） level. Polymer film had a maximal absorption peak at 469 nm with the optical bandgap of about 2.10 eV. The photovoltaic devices were fabricated based on PBTT and [6,6]-phenyl-C61-butyric acid methyl （PC61BM）, and exhibited power conversion efficiency of 0.43% with an open-circuit voltage as high as 1.00 V under AM 1.5 G illumination at 100 mW/cm^2 with a solar simulator.

关 键 词：苯并三噻吩 共轭聚合物 有机光伏 

分 类 号：O743.51[理学—晶体学]