Solution-processed CdS quantum dots on TiO2: light-induced electrochemical properties

Babasaheb R. Sankapal; Dipak B. Salunkhe; Sutripto Majumder; Deepak P. Dubal

doi:10.1039/C6RA14275C

Solution-processed CdS quantum dots on TiO₂: light-induced electrochemical properties

Babasaheb R. Sankapal,*^a Dipak B. Salunkhe,^b Sutripto Majumder^a and Deepak P. Dubal^c

Author affiliations

* Corresponding authors

^a Nano Materials and Device Laboratory, Applied Physics Department, Visvesvaraya National Institute of Technology, Nagpur – 440 010, India
E-mail: brsankapal@gmail.com, brsankapal@phy.vnit.ac.in
Fax: +91 712 2223230
Tel: +91 712 2801170

^b Thin Film and Nano Science Laboratory, Department of Physics, School of Physical Sciences, North Maharashtra University, Jalgaon – 425 001, India

^c Catalan Institute of Nanoscience and Nanotechnology, CIN2, ICN2 (CSIC-ICN), Campus UAB, E-08193 Bellaterra, Spain

Abstract

Mesoporous titanium dioxide (TiO₂) nanostructured thin films, formed by a simple chemical route, namely, the successive ionic layer adsorption reaction (SILAR) technique, were efficiently used to grow a cadmium sulphide (CdS) nanoparticle architecture for device grade applications. CdS nanoparticle have a highly symmetric size and shape that could be varied in a controlled manner (<10 nm size) depending on the number of SILAR immersions without the use of an organic linker molecule. XRD and HR-TEM studies showed the formation of CdS nanoparticles on TiO₂ nanoparticles. Such a nanomorphology showed good optical coverage over the visible region of light, and it revealed a red-shift with respect to the number of CdS layers, which was confirmed by both optical and external quantum efficiency studies. The photoelectrochemical performance of the TiO₂/CdS photoanodes showed that as the particle size of CdS increases with the number of SILAR immersions, the photocurrent density and photovoltage were found to be directly concurrent with the charge transport mechanism, which increases the cell efficiency.

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Publication details

The article was received on 01 Jun 2016, accepted on 15 Aug 2016 and first published on 16 Aug 2016

Article type: Paper

DOI: 10.1039/C6RA14275C

Citation: RSC Adv., 2016,6, 83175-83184

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Solution-processed CdS quantum dots on TiO₂: light-induced electrochemical properties

B. R. Sankapal, D. B. Salunkhe, S. Majumder and D. P. Dubal, RSC Adv., 2016, 6, 83175
DOI: 10.1039/C6RA14275C
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Solution-processed CdS quantum dots on TiO₂: light-induced electrochemical properties

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Solution-processed CdS quantum dots on TiO₂: light-induced electrochemical properties

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