Synthesis and photovoltaic properties of copolymers based on bithiophene and bithiazole
作者:Maojie Zhang、Haijun Fan、Xia Guo、Yang Yang、Shanshan Wang、Zhi-Guo Zhang、Jing Zhang、Xiaowei Zhan、Yongfang Li
DOI:10.1002/pola.24708
日期:2011.6.15
orbital levels of the copolymers and increases the open circuit voltage (Voc) of polymer solar cells (PSCs) based on the copolymers as donor, and the alkyl chain length influences the photovoltaic properties of the polymers significantly. The PSCs based on PBTBTz‐2 and PBTBTz‐3 show higher Voc up to 0.77 and 0.81 V, respectively. The power conversion efficiency of the PSC based on PBTBTz‐2:PC70BM =
通过Pd催化的Stille偶联反应合成了三种简单的结构化D-A共聚物PBTBTz-1,PBTBTz-2和PBTBTz-3,它们包含具有不同烷基链长的联噻吩(BT)供体单元和双噻唑(BTz)受体单元。方法。通过热重分析,紫外可见吸收,电化学循环伏安法和光伏测量对共聚物进行表征。结果表明,向聚噻吩主链引入BTz单元可有效降低共聚物的最高占据分子轨道能级,并增加开路电压(V oc聚合物太阳能电池(PSC)基于共聚物作为施主,烷基链的长度会显着影响聚合物的光伏性能。基于PBTBTz-2和PBTBTz-3的PSC分别显示更高的V oc,分别高达0.77和0.81V。在AM1.5、100 mW / m的光照下,基于PBTBTz-2:PC 70 BM = 1:1(w / w)的PSC的功率转换效率达到2.58%,短路电流为8.70 mA / cm 2厘米2。©2011 Wiley Periodicals,Inc