New conjugated alternating benzodithiophene-containing copolymers with different acceptor units: synthesis and photovoltaic application
作者:M. L. Keshtov、D. V. Marochkin、V. S. Kochurov、A. R. Khokhlov、E. N. Koukaras、G. D. Sharma
DOI:10.1039/c3ta12967e
日期:——
Two new alternating low band gap D–A copolymers with different acceptor structures of 4,8-bis-(5-bromothiophene-2-yl)-benzo[1,2,5]thiadiazole (P1) and 4,8-dithiophene-2-yl-benzo[1,2-c;4,5-c′]-bis-[1,2,5]thiadiazole (P2) and a common BDT donor segment have been synthesized under Stille reaction conditions and characterized. The polymers showed good solubility, broad absorption bands and optical band
两种新的交替低带隙D–A共聚物,具有不同的4,8-双-(5-溴噻吩-2-基)-苯并[1,2,5]噻二唑(P1)和4,8-二噻吩-在Stille反应条件下合成了2-基-苯并[1,2- c ; 4,5- c ']-双-[1,2,5]噻二唑(P2)和常见的BDT供体链段并对其进行了表征。该聚合物对P1和P2分别显示出良好的溶解度,宽吸收带和1.62 eV的光学带隙和1.16 eV的光学带隙。基于P1和P2作为电子给体和富勒烯衍生物的本体异质结(BHJ)聚合物太阳能电池(PC 60 BM和PC 70制备了作为受体的BM)并研究了它们的光伏响应。基于THF溶剂浇铸的P1:PC 60 BM,P2:PC 60 BM,P1:PC 70 BM和P2:PC 70 BM混合物的BHJ太阳能电池的总功率转换效率(PCE)约为2.17%,0.80% ,分别为3.45%和1.19%。基于所述设备的更高PCE P1已被