Synthesis and photovoltaic properties of low-bandgap alternating copolymers consisting of 3-hexylthiophene and [1,2,5]thiadiazolo[3,4-g]quinoxaline derivatives
作者:Yoonkyoo Lee、Thomas P. Russell、Won Ho Jo
DOI:10.1016/j.orgel.2010.01.027
日期:2010.5
different kinds of low-bandgapalternatingcopolymers consisting of 3-hexylthiophene and [1,2,5]thiadiazolo[3,4-g]quinoxaline were synthesized via the Stille coupling reaction. The copolymers show broad absorption band from visible to infrared region. The bandgaps (1.02–1.35 eV) of the copolymers are successfully tuned by changing the substituent on the acceptor unit. The copolymers are highly soluble
通过Stille偶联反应合成了由3-己基噻吩和[1,2,5]噻二唑并[3,4- g ]喹喔啉组成的两种不同的低带隙交替共聚物。共聚物显示了从可见光到红外光的宽吸收带。通过改变受体单元上的取代基可以成功地调节共聚物的带隙(1.02-1.35 eV)。由于在重复单元中存在三个3-己基噻吩,因此该共聚物高度溶于普通有机溶剂。通过优化设备参数(例如共聚物与PCBM的混合比和选择加工溶剂),在标准太阳辐射条件(AM 1.5G,100 mW / cm 2)下,功率转换效率高达1.27%。