期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 2, 期 20, 页码 3921-3927出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4tc00086b
关键词
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资金
- National Natural Science Foundation of China [21274134, 51173199, 61107090]
- Ministry of Science and Technology of China [2010DFA52310]
- New Century Excellent Talents in University [NCET-11-0473]
- Shandong Provincial Natural Science Foundation [ZR2011BZ007]
- Hong Kong Scholar Program
- Shenzhen Municipal Science and Technology Program [JCYJ20130401145617279]
- Qingdao Municipal Science and Technology Program [13-1-4-200-jch, 11-2-4-22-hz]
- Postdoctoral Science Foundation of China [XJ2012042, 2012T50630, 2013M530329]
Benzodithiophene (BDT) and benzothiadiazole (BT) based small molecules have been synthesized through palladium-catalyzed Stille coupling reactions. The molecules with and without the conjugated thiophene side-chain were named as DRTBTTBDTT (2D) and DRTBTTBDT (1D), respectively. These molecules exhibited an optical band gap of around 1.8 eV. Solution-processed thin films of 1D and 2D showed that the conjugated thiophene side-chain oriented to produce a uniform 2D structure, which led to a relatively high hole mobility of 0.016 cm(2) V-1 s(-1), and this was one of the highest values for solutionprocessed small-molecule donors in organic solar cells (OSCs). With proper engineering of energy levels, the organic solar cells based on DRTBTTBDTT (2D) as donors exhibited a high Voc of around 0.9 V.
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