期刊
SYNTHETIC METALS
卷 187, 期 -, 页码 24-29出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2013.10.017
关键词
Small molecule; Thienoisoindigo; Solution-processed; Near-infrared; Organic solar cells
资金
- National Natural Science Foundation of China [21274134, 51173199]
- New Century Excellent Talents in University [NCET-11-0473]
- Department of Science and Technology of Shandong Province [2010GGC10345]
- Qingdao Municipal Science and Technology Program [11-2-4-22-hz, 13-1-4-200-jch]
5'-Hexyl-2,2'-bithiophene end-capped thienoisoindigo-based small molecule (TIDO2T) is synthesized by Stille coupling reaction. The TIDO2T exhibits good solubility in common organic solvents such as THF, toluene, dichlorobenzene and chloroform. The UV-vis absorption spectrum of TIDO2T shows wide absorption between 427 nm and 871 nm in thin solid film, and the optical band-gap calculated from absorption onset was 1.42 eV. Bulk heterojunctions (BHJ) solar cell was fabricated with TIDO2T as the donor and 6,6-phenyl-C-61-butyric acid methyl ester (PC61 BM) as the acceptor by simple solution spin-coating processing. The device obtained a power conversion efficiency of 1.14% with V-OC 0.44V, J(SC) 7.76 mA cm(-2) and FF 33% under AM 1.5G solar simulator. The external quantum efficiency (EQE) curve extends to near-infrared region (around 900-1000 nm). (C) 2013 Elsevier B.V. All rights reserved.
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