New quinoxaline derivatives as accepting units in donor-acceptor type low-band gap polymers for organic photovoltaic cells
作者:Ji-Hoon Kim、Chang Eun Song、Hee Un Kim、In-Nam Kang、Won Suk Shin、Moo-Jin Park、Do-Hoon Hwang
DOI:10.1002/pola.26823
日期:2013.10
A series of new donor–acceptor‐type low‐band‐gap semiconducting polymers were synthesized as electron donors for organic photovoltaic cells. The polymers comprised quinoxaline derivatives as the acceptors and a benzodithiophene (BDT) derivative as the donors. 5,8‐Dibromoquinoxaline (Qx), 8,11‐dibromobenzo[a]phenazine (BPz), 10,13‐dibromodibenzo[a,c]phenazine (DBPz), and 8,11‐dibromo‐5‐(9H‐carbazol
合成了一系列新的供体-受体型低带隙半导体聚合物,作为有机光伏电池的电子供体。所述聚合物包含喹喔啉衍生物作为受体和苯并二噻吩(BDT)衍生物作为供体。5,8-二溴喹喔啉(Qx),8,11-二溴苯并[a]吩嗪(BPz),10,13-二溴二苯并[a,c]吩嗪(DBPz)和8,11-二溴-5-(9H-咔唑) ‐9‐yl)苯并[a]吩嗪)(CBPz)合成并与2,6‐双(三甲基锡)−4,8‐二乙基己氧基苯并苯并[1,2,b; 3,4‐b]二噻吩(BDT)聚合)通过Stille交叉耦合产生四种类型的完全共轭半导体聚合物:PBDT-Qx,PBDT-BPz,PBDT-DBPz和PBDT-CBPz, 分别。聚合物主链中给电子单元和接受单元之间的分子内电荷转移引起300至800 nm的宽吸收。从聚合物的吸收起始点开始测量,它们的光学带隙能量为1.54-1.80 eV,具体取决于聚合物的结构。制备了溶液处理的场效