摘要
设计合成了一种中等带隙共轭聚合物,聚[N-(2-己基癸基)-2,2'-二噻吩-3,3'-二甲酰亚胺-交替共聚-5,5-(2,5-双(3-癸氧基噻吩)-2-噻吩基)-噻吩)](PBTI3T-O),其光谱吸收覆盖波长从400 nm到720 nm,具有较宽的吸收范围,同时易溶于氯苯溶剂,利于溶液加工。PBTI3T-O与[6,6]-苯基-C71-丁酸异甲酯(PC71BM)复合薄膜的空穴迁移率为5.90×10-3cm2/(V·s),该迁移率高于其它大部分聚合物电池给体材料。由于PBTI3T-O较高的空穴迁移率,基于PBTI3T-O/PC71BM的器件在活性层厚度为237 nm时,效率可以达到5.56%。即使活性层膜厚进一步增加到约300 nm时,器件的效率仍能够保持其最高器件效率的97%,可见其具有在大面积加工工艺中的应用潜力。
One of the important prerequisites of large-area production is that the power conversion efficiency of polymer solar cells is insensitive to the active layer thickness. A novel donor-acceptor copolymer,named poly[N-（ 2-hexyldecyl）-2,2＇-bithiophene-3,3＇-dicarboximide-alt-5,5-（ 2,5-bis（ 3-（ decyloxy） thiophene-2-yl）-thiophene） ]（ PBTI3T-O）,with a moderate band gap has been designed and synthesized. PBTI3T-O shows a broad absorption range of 400 ~ 720 nm and good solubility in chlorobenzene（ CB）. The hole mobility of PBTI3T-O and [6,6]-phenyl-C71-butyric acid methyl ester（ PC71BM） blend is 5. 90 × 10- 3cm2/（ V·s）,which is higher than those of most other materials. The excellent charge transport property leads to a power conversion efficiency of 5. 56% with a thick active layer of 237 nm. Furthermore,PBTI3T-O based device retains 97% of the highest efficiency with a thickness of ca. 300 nm,indicating its potential application in large-area production.
出处
《应用化学》
CAS
CSCD
北大核心
2016年第12期1375-1382,共8页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助项目(21574132
21504090)~~
