期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 211, 期 24, 页码 2555-2561出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201000473
关键词
benzodithiophene; conjugated polymers; low bandgap; high mobility; polymer solar cells
资金
- National Natural Science Foundation for Distinguished Young Scholar [50825102]
- National Natural Science Foundation of China [50803074, 50633050, 20976199]
- Lieying Project
- Fundamental Research Funds for the Central Universities
- State Key Laboratory of Powder Metallurgy
A new high-mobility low-bandgap polymer, PBDT-DODTBT, based on benzodithiophene and 5,6-bis(octyloxy)-4,7-di(thiophen-2-yl) benzothiadiazole has been synthesized through a standard Stille coupling reaction. The polymer is soluble in common organic solvents, such as chloroform, tetrahydrofuran, and chlorobenzene and has excellent film forming properties. Preliminary studies of the copolymer showed the charge mobility as high as 7.15 x 10(-3) cm(2).V-1. s(-1) from SCLC measurement. Initial photovoltaic cells based on the composite structure of ITO/PEDOT: PSS/PBDT-DODTBT: (PC71BM)-P-alpha (1:2)/Ca/Al showed an open-circuit voltage of 0.76 V, a power conversion efficiency of 4.02%, and a short-circuit current of 8.96mA.cm(-2).
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