<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Zinc sulphide (ZnS) thin films were prepared by improved spray pyrolysis (ISP) method. The ISP parameters, such as carrier gas flow rate, solution flow rate and substrate temperature, were controlled with an accuracy of ±0.25 lpm, ±1 ml/h and ±1 °C, respectively. The solution was sprayed in a pulsed mode. The substrate temperature was optimized by analyzing substrate temperature dependent properties of thin films. The thin film deposited at a temperature of 450 °C was dense and fairly smooth with satisfactory crystallinity and very small impurity content. The effect of precursor ratio in the solution on structural, compositional and optical properties of thin ZnS films, deposited at a temperature of 450 °C, was studied. A gradual increase in band gap energy from 3.524 eV to 3.634 eV, refractive index from 2.5 to 2.9 and dielectric constant from 6.6 to 8.7 were observed with the variation of solution precursor (Zn:S) ratio from (1:2) to (1:6). The structural and compositional studies support this kind of enhancement in optical properties. The results show that the thin ZnS film prepared by ISP at the substrate temperature of 450 °C from a solution with specific precursor ratio can be used for optoelectronic and photovoltaic applications.</p></abstract>

Zinc sulphide (ZnS) thin films were prepared by improved spray pyrolysis (ISP) method. The ISP parameters, such as carrier gas flow rate, solution flow rate and substrate temperature, were controlled with an accuracy of ±0.25 lpm, ±1 ml/h and ±1 °C, respectively. The solution was sprayed in a pulsed mode. The substrate temperature was optimized by analyzing substrate temperature dependent properties of thin films. The thin film deposited at a temperature of 450 °C was dense and fairly smooth with satisfactory crystallinity and very small impurity content. The effect of precursor ratio in the solution on structural, compositional and optical properties of thin ZnS films, deposited at a temperature of 450 °C, was studied. A gradual increase in band gap energy from 3.524 eV to 3.634 eV, refractive index from 2.5 to 2.9 and dielectric constant from 6.6 to 8.7 were observed with the variation of solution precursor (Zn:S) ratio from (1:2) to (1:6). The structural and compositional studies support this kind of enhancement in optical properties. The results show that the thin ZnS film prepared by ISP at the substrate temperature of 450 °C from a solution with specific precursor ratio can be used for optoelectronic and photovoltaic applications.

Effect of substrate temperature and precursor ratio on properties of thin ZnS films sprayed by improved method

Department of Physics, S. N. Arts, D. J. M. Commerce and B. N. S. Science College, Sangamner, Ahmednagar, Maharashtra, 422605, India

K. K. W. Arts, Science and Commerce College, Pimplegaon (B), Nashik, Maharashtra, India

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Zinc sulphide (ZnS) thin films were prepared by improved spray pyrolysis (ISP) method. The ISP parameters, such as carrier gas flow rate, solution flow rate...

Effect of substrate temperature and precursor ratio on properties of thin ZnS films sprayed by improved method

Published Online: Oct 17, 2014

Page range: 375 - 384

DOI: https://doi.org/10.2478/s13536-014-0224-y

Keywords
improved spray pyrolysis, pulsed mode of spray, crystalline ZnS, precursor ratio, (S/Zn) atomic ratio, optical properties

© 2014 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of substrate temperature and precursor ratio on properties of thin ZnS films sprayed by improved method

Published Online: Oct 17, 2014

Page range: 375 - 384

DOI: https://doi.org/10.2478/s13536-014-0224-y

Keywordsimproved spray pyrolysis, pulsed mode of spray, crystalline ZnS, precursor ratio, (S/Zn) atomic ratio, optical properties

© 2014 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
improved spray pyrolysis, pulsed mode of spray, crystalline ZnS, precursor ratio, (S/Zn) atomic ratio, optical properties