共 42 条
Dithienocyclopentathieno[3,2-b]thiophene Hexacyclic Arene for Solution-Processed Organic Field-Effect Transistors and Photovoltaic Applications
被引:24
作者:
Cheng, Yen-Ju
[1
]
Chen, Chiu-Hsiang
[1
]
Lin, Tai-Yen
[1
]
Hsu, Chain-Shu
[1
]
机构:
[1] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 30010, Taiwan
关键词:
copolymerization;
field-effect transistors;
photovoltaics;
polymers;
solar cells;
BAND-GAP;
CONJUGATED POLYMERS;
SIDE-CHAINS;
COPOLYMERS;
EFFICIENCY;
SYSTEMS;
SERIES;
CELLS;
D O I:
10.1002/asia.201100979
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
We have developed a ladder-type dithienocyclopentathieno[3,2-b]thiophene (DTCTT) hexacyclic unit in which the central thieno[3,2-b]thiophene ring was covalently fastened to two adjacent thiophene rings through carbon bridges, thereby forming two connected cyclopentadithiophene (CPDT) units in a hexacyclic coplanar structure. This stannylated Sn-DTCTT building block was copolymerized with three electron-deficient acceptors, dibromo-thieno[3,4-c]pyrrole-4,6-dione (TPD), dibromo-benzothiadiazole (BT), and dibromo-phenanthrenequinoxaline (PQX), by Stille polymerization, thereby furnishing a new class of alternating donoracceptor copolymers: PDTCTTTPD, PDTCTTBT, and PDTCTTPQX, respectively. Field-effect transistors based on PDTCTTPQX and PDTCTTBT yielded high hole mobilities of 0.017 and 0.053 cm2?V-1?s-1, respectively, which are among the highest performances among amorphous donoracceptor copolymers. A bulk heterojunction solar cell that incorporated PDTCTTTPD with the lower-lying HOMO energy level delivered a higher Voc value of 0.72 V and a power conversion efficiency (PCE) value of 2.59?%.
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页码:818 / 825
页数:8
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