Synthesis and Photovoltaic Properties of Copolymers Based on Benzo[1,2-<i>b</i>:4,5-<i>b</i>′]dithiophene and Thiophene with Different Conjugated Side Groups
作者:Zhaojie Gu、Peng Tang、Bin Zhao、Hao Luo、Xia Guo、Huajie Chen、Gui Yu、Xinping Liu、Ping Shen、Songting Tan
DOI:10.1021/ma202399n
日期:2012.3.13
Three novel copolymers (PT-ID, PT-DTBT, and PT-DTBTID) of benzo[1,2-b:4,5-b′]dithiophene and thiophene with different conjugated side groups (1,3-indanedione (ID), 4,7-dithien-5-yl-2,1,3-benzodiathiazole (DTBT), and DTBT-ID) were synthesized and developed for polymer solar cell applications. The effects of the different conjugated side groups on the thermal, photophysical, electrochemical and photovoltaic
苯并[1,2- b:4,5- b ']二噻吩和噻吩具有不同共轭侧基的三种新型共聚物(PT-ID,PT-DTBT和PT-DTBTID)(1,3-茚满二酮(ID) ,4,7-二噻吩-5-基-2,1,3-苯并二噻唑(DTBT)和DTBT-ID)合成并开发用于聚合物太阳能电池应用。研究了不同共轭侧基对这些共聚物的热,光物理,电化学和光伏性质的影响。随着共轭侧基长度的增加,溶液中UV-vis区域的吸收发生红移。通过改变不同的侧基,可以有效地调节所得共聚物的能级和带隙。这三种共聚物表现出较高的HOMO能级和相对较高的开路电压(V oc)。具有这些共聚物作为电子给体和(6,6)-苯基-C 61-丁酸甲酯(PC 61BM)作为电子受体对PT-ID,PT-DTBT和PT-DTBTID分别显示出2.48%,4.18%和1.16%的功率转换效率。