Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 21, Pages 11607-11614Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta01861g
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Funding
- National Natural Science Foundation of China [91023008, 21474027, 21172073, 91233207]
- Key Laboratory of Advanced Polymer Materials of Shanghai [WD10140502]
- Shanghai Leading Academic Discipline Project [B502]
- Shanghai local government
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The co-sensitization of N719 with conjugated polyphenylenes for dye-sensitized solar cells (DSSCs) was demonstrated. The conjugated polyphenylenes (6-BC and 7-BC), which contain two triphenylamine (TPA) groups as electron donors and carboxylic acids as adsorption groups, were prepared from thermally triggered Bergman cyclization polymerization of two maleimide-based enediynes, 6 and 7. Both the short-circuit photocurrent density (J(SC)) and the open-circuit voltage (V-OC) of the co-sensitized DSSCs were enhanced due to the increase in light harvesting and the retardation of electron recombination and dye aggregation when N719 was co-sensitized with the conjugated polyphenylenes. The co-sensitized (7-BC + N719) DSSC showed a high efficiency of 9.68% (V-OC of 750 mV, J(SC) of 18.18 mA cm (2) and FF of 0.71), exhibiting an improvement of 16% compared to the devices sensitized with N719 (PCE of 8.34%) alone under identical conditions.
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