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International Conference on Innovative Applied Energy    

E-Proceedings ISBN: 978-1-912532-05-6

14-15 March 2019, Oxford, United Kingdom



Multi-dimensional solvothermal growth and characterization of ZnS nanoparticles for photoanodes in solar cells



Medha Bhushan, Ranjana Jha and Rekha Bhardwaj

Rresearch lab for Energy Systems, Department of Physics Netaji Subhas institute of Technology, University of Delhi, India



Paper Abstract

Today global carbon emission from fossil fuels is a matter of concern. For reducing carbon emissions, sustainable and cost-effective forms of energy help in a contemporary research in the field of smart energy systems. ZnS nanostructures have possibility of multiple utilisation in different kinds of optoelectronic devices, and in novel solar cells including DSSCs, QDSCs, CIGS solar cell, and hybrid solar cells. Controlling the morphology of nanostructures of ZnS are of great importance for discovering the properties for their utilization in a significant technology.In this study,multi- dimensional nanostructures i.e. 1-D(nanorods),2-D(nanoplates) and 3-D (nanospheres) have been grown by means of solvo-thermal technique by changing the proportion of different solvents i.e. deionised water and ethylenediamine in a different volume proportion. Increasing the concentration of ethylene diamine results in decrease of the dimension of nanostructure and also in the phase change from Zinc Blende (ZB) to Wurtzite(WZ).These different phases have been confirmed by High resolution X-Ray diffraction (XRD). Going through various literature, WZ phase has a higher volume percentage so it has higher energy absorption capacity which is an essential requirement for efficient solar cells and also WZ phase of ZnS is preferable over ZB due to its excellent optical properties. The crystallite size has been ascertained utilizing Debye Scherer’s formula for all the three nanostructures i.e. ~20-40nm for ZB phase and ~10-20 nm for WZ phase. In Fourier transform infrared spectroscopy (FT-IR),the various vibrational band stretching are in better concurrence with the reported one of ZnS. The optical band gap found is in the range of 3-4eV. Further after discovering various properties of ZnS, it is found to be suitable material for the photo anodes in solar cells. 

Paper Keywords
Smart energy systems,Solvothermal technique,Buffer layer,Wurtzite,Zinc Blende.
Corresponding author Biography

Medha Bhushan, M.Sc. Applied Physics now pursuing PhD in Physics from Department of Physics, Netaji Subhas Institute of Technology, University of Delhi, India. Her research interest is synthesis of Solar Energy Nano-Materials, fabrication of Nano-structured thin film Solar cells and Characterization of Energy Materials for Device Applications. In addition during M.Sc., she has done minor project in the field of plasma physics and major project on single crystal growth and its characterization from CSIR-National Physical Laboratory, New Delhi, India.

She has presented more than 15 papers in national and international conferences and attended several short term courses & workshops in the field of recent research trends in applied physics, published 7 papers in national/international journals and proceedings.

The International Conference on Innovative Applied Energy (IAPE’18)