Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 152, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0009177
Keywords
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Funding
- National Natural Science Foundation of China [21572069, 21772045]
- National Key Research and Development Program of China [2016YFA0602900]
- Natural Science Foundation of Guangdong Province, China [2018B030311008]
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Three novel metal-free organic dyes (TPTZ1, TPTZ2, and TPTZ3) with an A-D-pi -D-A configuration were synthesized and applied for dye-sensitized solar cells (DSSCs). The relationship between the photovoltaic properties and the different connection bridges of these organic dyes was studied systematically, showing that a strategical variation on the linkage ways of dithiophene can obviously affect the twisted degree of backbone and, thus, have a great effect on inhibiting the intermolecular aggregation. Compared with a bulky rigid group substituted on TPTZ3, introducing flexible side chains at suitable sites on the TPTZ1 and TPTZ2 seems to be a more effective strategy to achieve high photoelectric performance for double anchoring dye. Indeed, the DSSCs based on TPTZ2 exhibit a high efficiency of 7.50%, reaching 99% of an N719-based standard cell at the same condition. This study provides a new approach for highly efficient anti-aggregation organic sensitizers.
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