Syntheses and Properties of Copolymers with<i>N</i>-Alkyl-2,2′-bithiophene-3,3′-dicarboximide Unit for Polymer Solar Cells
作者:Juae Kim、Shin Hyun Kim、Taehyo Kim、Joo Young Shim、Dongkyung Park、Jinwoo Kim、Il Kim、Jin Young Kim、Hongsuk Suh
DOI:10.1002/bkcs.10435
日期:2015.9
random copolymers using the electron‐deficient unit N‐alkyl‐2,2′‐bithiophene‐3,3′‐dicarboximide (BTI) for organic solar cells. For absorption over a broader range of the solar spectrum, push–pull types of conjugated polymers PBTIBDT ‐3, PBTIBDT ‐5, and PBTIBDT ‐7, containing 4,8‐bis(2‐octyldodecyloxy)benzo[1,2‐b;3,4‐b']dithiophene (BDT) as electron‐pushing unit and BTI as electron‐pulling unit, were
我们报告了使用有机电子电池的缺电子单元N-烷基-2,2'-联噻吩-3,3'-二羧酸二酰亚胺(BTI)形成的新无规共聚物。为了在更宽的太阳光谱范围内吸收,推挽类型的共轭聚合物PBTIBDT - 3,PBTIBDT - 5和PBTIBDT - 7包含4,8-双(2-辛基十二烷氧基)苯并[1,2- b]; 3,4- b'合成了作为电子推动单元的]二噻吩(BDT)和作为电子推动单元的BTI。聚合物是通过Stille聚合与Pd(0)催化剂偶联电子推动单元和电子牵引单元而合成的。引入更多的BTI单元会引起聚合物薄膜吸收光谱的更多红移。由PBTIBDT - 5和PC 71 BM(1:1)组成的器件显示V OC = 0.76 V,J SC = 3.28 mA / cm 2,填充系数(FF)= 0.51,功率转换效率为1.26%。