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Title: Dye-sensitised solar cells with iodine-free discotic electrolytes
Authors: Selvaraj, Ananda Rama Krishnan
Lakshminarayanan, V.
Dhar, Ravindra
Kumar, Sandeep
Keywords: redox system
recombination time constant,
Issue Date: Dec-2015
Publisher: Taylor & Francis
Citation: Liquid Crystals, 2015, Vol.42, p 1815-1822
Abstract: Discotic mesogenic molecules viz., hexahexylthiotriphenylene (HHTT) and hexahexyloxytriphenylene were applied, for the first time, as iodine-free redox electrolyte in dye-sensitised solar cells (DSSCs). The cell shows open circuit voltage (Voc) of 0.95 V, short circuit current density (Jsc) of 0.534 mA/cm2, fill factor 88.24% and overall power conversion efficiency (η) 0.45% in a typical fluorine doped tin oxide/TiO2/N719/HHTT/Pt DSSC configuration. Scanning electron microscopy was used to study surface profile of electrolytes while electrochemical impedance spectroscopy was used to understand the electrochemical behaviour of electrolytes. The photovoltaic parameters were measured under standard conditions using Oriel solar simulator class AAA. These first results demonstrate the potential of the discotic molecules as charge transporter and mediator and show promise to be used in iodine-free DSSCs.
Description: Restricted Access.
ISSN: 0267-8292
1366-5855 (Online)
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Copyright: 2015 Taylor & Francis
Appears in Collections:Research Papers (SCM)

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