Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 3, Issue 27, Pages 6979-6985Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc01148e
Keywords
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Funding
- NSF of China [21161160443]
- 973 Programs [2011CB935702]
- Program for Changjiang Scholars and Innovative Research Team in University
- Fundamental Research Funds for the Central Universities
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A novel small molecule NI-T-NI with a thiophene core and two 1,8-naphthalimide terminal groups was synthesized via direct C-H activation and used as the acceptor for polymer solar cells. NI-T-NI exhibits a good crystallinity and can form H-aggregates in the solid state. NI-T-NI has a rather high-lying LUMO level, which is beneficial for achieving a high V-OC. In cooperation with a high-lying LUMO level polymer PCDTBT-C12, a PCE of 2.01% with a high V-OC of 1.30 V has been achieved. As far as we know, a V-OC of 1.30 V is the highest value reported for single junction organic solar cells. Our results have demonstrated that 1,8-naphthalimide could be a useful building block for the synthesis of promising acceptor materials for polymer solar cells.
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