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Phenothiazine derivatives-based D-pi-A and D-A-pi-A organic dyes for dye-sensitized solar cells
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2014 (English)In: RSC Advances, ISSN 2046-2069, Vol. 4, no 46, 24377-24383 p.Article in journal (Refereed) Published
Abstract [en]

D-pi-A and D-A-pi-A-structured organic dyes represent different developmental directions of photosensitizers in dye-sensitized solar cells (DSSCs). In this work, two phenothiazine derivatives-based D-pi-A and D-A-pi-A-structured organic dyes have been synthesized and applied in DSSCs. The physical and electrochemical properties of both dyes have been investigated systematically. The results show that the D-A-pi-A-structured dye exhibits a broader spectrum response but lower molar coefficient of extinction when compared to the D-pi-A-structured dye. Regarding photovoltaic performance, the D-pi-A-structured dye yields a higher efficiency (h) of 7.5% with a higher short-circuit current density (J(sc)) of 16.36 mA cm(-2) and open-circuit voltage (V-oc) of 706 mV than that of the D-A-pi-A-structured dye. Incident photon-to-electron conversion efficiency (IPCE) studies and impedance analysis also support these results. These results demonstrate that the phenothiazine derivatives-based D-pi-A-structured organic dyes can compete with, and even exceed, D-A-pi-A-structured organic dyes under the same test conditions.

Place, publisher, year, edition, pages
2014. Vol. 4, no 46, 24377-24383 p.
Keyword [en]
Significant Improvement, Highly Efficient, Tio2 Films, Performance, Energy
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-148188DOI: 10.1039/c4ra01858cISI: 000338042500064ScopusID: 2-s2.0-84902310004OAI: diva2:735975

QC 20140804

Available from: 2014-08-04 Created: 2014-08-04 Last updated: 2014-08-04Bibliographically approved

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Sun, Licheng
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Organic ChemistryCentre of Molecular Devices, CMD
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