Co-sensitization of N719 with polyphenylenes from the Bergman cyclization of maleimide-based enediynes for dye-sensitized solar cells

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 thermal...

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Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2015-01, Vol.3 (21), p.11607-11614
Main Authors: Dong, Luhua, Zheng, Zhiwei, Wang, Youfu, Li, Xing, Hua, Jianli, Hu, Aiguo
Format: Article
Language:English
Subjects:
Density
Devices
Dyes
Enediynes
Photovoltaic cells
Polymerization
Solar cells
Sustainability
Volatile organic compounds
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Summary: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.
ISSN:2050-7488
2050-7496
DOI:10.1039/C5TA01861G