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Bhosale R.K.,CSIR - National Chemical Laboratory | Bhosale R.K.,Network Institute of Solar Energy NISE | Bhosale R.K.,Academy of Scientific and Innovative Research | Agarkar S.A.,CSIR - National Chemical Laboratory | And 10 more authors.
RSC Advances | Year: 2014

Single phase CuInS2 (CIS) nanosheets are synthesized on TiO 2 coated FTO by the simple technique of Successive Ionic Layer Adsorption Reaction (SILAR) followed by annealing at 500 °C. Annealing at a lower temperature of 250 °C is found to yield CuS nanoparticles in addition to the CIS phase. Both single phase CIS and the CuS/CIS nanocomposite were examined as counter electrodes for a dye-sensitized solar cell (DSSC). The CIS-CuS composite is found to have a synergistic effect on the catalytic performance toward the reduction of tri-iodide, yielding a power conversion efficiency of 6.3% as compared to pristine CIS (5%) or CuS (3.5%). The possible reasons behind the high performance of the composite are elucidated using cyclic voltammetry (CV) measurements and electrochemical impedance spectroscopy (EIS). This journal is © the Partner Organisations 2014.

Banerjee A.,CSIR - National Chemical Laboratory | Banerjee A.,Network Institute of Solar Energy NISE | Upadhyay K.K.,CSIR - National Chemical Laboratory | Upadhyay K.K.,Network Institute of Solar Energy NISE | And 13 more authors.
RSC Advances | Year: 2014

Self supported nickel cobalt sulfide (NCS) nanoneedles are directly formed on FTO glass substrates by sulphurization of nickel cobalt oxide nanoneedles (grown by a hydrothermal method) in the presence of a hydrogen sulfide and argon gas mixture. These NCS nanoneedles when used as a counter electrode for dye sensitized solar cells (DSSCs) show efficient catalytic activity towards the I-/I3 - redox couple, and lead to an impressive efficiency of 6.9%, compared with 7.7% obtained with a Pt electrode in similarly constructed devices. © 2014 The Royal Society of Chemistry.

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