Impact of strength and size of donors on the optoelectronic properties of D–π–A sensitizers

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Sivanadanam, J.; Ganesan, P.; Gao, Peng; Nazeeruddin, Md. K.; Emeline, Alexei et al.: Impact of strength and size of donors on the optoelectronic properties of D–π–A sensitizers. In: RSC Advances 6 (2016), Nr. 44, S. 37347-37361. DOI:

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Sum total of downloads: 108

A series of carbazole based sensitizers with either phenyl based donors (TBC, TMC, OMC, PC, TBR, TMR, OMR and PR) or aryl amine based donors (OMNC, CNC and HNC) as well as one without a donor group (CC) have been synthesized to understand the influence of the strength of the donor moiety on the optical, electrochemical and photovoltaic properties. Two different acceptor moieties such as cyano acrylic acid and rhodanine acetic acid were introduced and evaluated. Different substituents on the phenyl group have a significant impact on the light harvesting ability of the sensitizers. Among phenyl based donors, anisole based carbazole (OMC) shows the highest short circuit current (JSC) of 4.96 mA cm−2 with overall power conversion efficiency (PCE) of 2.69%. In the case of the sensitizers with aryl amine based donors, the increasing bulkiness of the donor group lead to increasing open circuit potential. Transient photocurrent and photovoltage measurements signify the importance of a bulky donor fragment in determining the open circuit potential of the dyes. Sensitizers with hexyloxy substituted phenyl amine as the donor group shows a JSC of 6.84 mA cm−2 with PCE of 3.33%. The overall investigation provides vital information about the influence of donor groups on the optoelectronic properties of the sensitizers for its photovoltaic applications.
License of this version: CC BY 3.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2016
Appears in Collections:Naturwissenschaftliche Fakultät

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pos. country downloads
total perc.
1 image of flag of Germany Germany 57 52.78%
2 image of flag of United States United States 17 15.74%
3 image of flag of China China 8 7.41%
4 image of flag of France France 5 4.63%
5 image of flag of Portugal Portugal 3 2.78%
6 image of flag of India India 3 2.78%
7 image of flag of Indonesia Indonesia 2 1.85%
8 image of flag of Czech Republic Czech Republic 2 1.85%
9 image of flag of Saudi Arabia Saudi Arabia 1 0.93%
10 image of flag of Russian Federation Russian Federation 1 0.93%
    other countries 9 8.33%

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