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Photovoltaic properties of bis(octyloxy)benzo-[c][1,2,5]thiadiazole sensitizers based on an N,N-diphenylthiophen-2-amine donor
KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology.ORCID iD: 0000-0001-6508-8355
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2014 (English)In: Journal of Materials Chemistry C, ISSN 2050-7526, Vol. 2, no 20, 4063-4072 p.Article in journal (Refereed) Published
Abstract [en]

Three D-A-π-A sensitizers (DOBT-IV to DOBT-VI) with N,N- diphenylthiophen-2-amine as the donor and bis(octyloxy)benzo-[c][1,2,5] thiadiazole (DOBT) as the auxiliary acceptor have been designed and synthesized. Their applications to dye-sensitized solar cells with I-/I 3 - and Co(ii)/(iii) electrolytes were measured and characterized. Via fine tuning of the π-bridge, the highest photoelectric conversion efficiency of 7.16% was obtained with Jsc = 16.88 mA cm-2, Voc = 0.662 V and FF = 64.03% for the DOBT-V based dye-sensitized solar cells using the I-/I3 - electrolyte under standard global AM1.5 solar conditions. A photoelectric conversion efficiency of 6.14% was obtained with Jsc = 11.35 mA cm-2, Voc = 0.760 V and FF = 71.16% with the Co(ii)/(iii) electrolyte under standard global AM1.5 solar conditions. The optical and electrochemical properties and the photovoltaic performance were evaluated and investigated using density functional theory calculations, a behavior study of the four performance parameters with dependence of the incident light intensity, electrochemical impedance spectroscopy and intensity-modulated photo-voltage spectrometry.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2014. Vol. 2, no 20, 4063-4072 p.
Keyword [en]
Density-Functional Thermochemistry, Intensity-Modulated Photovoltage, Power Conversion Efficiency, Complex Redox Shuttle, Tio2 Solar-Cells, Pi-A, Organic-Dye, Highly Efficient, Charge Recombination, Molecular Design
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-145395DOI: 10.1039/c4tc00169aISI: 000335226100027Scopus ID: 2-s2.0-84899536847OAI: oai:DiVA.org:kth-145395DiVA: diva2:718058
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QC 20140519

Available from: 2014-05-19 Created: 2014-05-19 Last updated: 2014-06-03Bibliographically approved

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Li, XinÅgren, Hans

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