EFFECT OF SN-CONCENTRATION ON THE MORPHOLOGICAL AND STRUCTURAL PROPERTIES OF SNO2/ZNO HETEROSTRUCTURES GROWN VIA USP
This study presents the successful synthesis of SnO2/ZnO bilayer heterostructures on p-Si(100) substrates via ultrasonic spray
pyrolysis (USP). Unlike conventional doping, this research focus on a functional dual-layer system with a high tin concentration
of 17.41 at.%. XRD analysis confirmed a hexagonal wurtzite structure with a dominant (002) c-axis orientation and an average
crystallite size of 39.8 nm. EDS verified the integration of SnO2 and ZnO phases, revealing 17.41 at.% Sn and 12.44 at.% Zn.
Spectroscopic ellipsometry, utilizing a SnO2/ZnO/SiO2/Si multilayer model, determined a total oxide thickness of 248.20 nm and
an effective refractive index of n = 1.9466 at 632.8 nm. The results demonstrate that USP-grown bilayers provide a robust, highly
transparent, and conductive alternative for advanced optoelectronic applications.
1. Ma, J., Ji, F., Duan, H. L., and Ma, H. L. (2003). Preparation and properties of transparent conducting Sn-doped ZnO films.
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 21(3), 696-702.
2. Sahay, P. P., and Nath, R. K. (2008). Al-doped ZnO thin films as self-selective ethanol sensors. Sensors and Actuators B:
Chemical, 134(2), 654-659. https://doi.org/10.1016/j.snb.2008.06.006.
3. Ajdary, A., Leprince-Wang, Y. (2016). Structure and properties of Sn-doped ZnO nanostructures. Journal of Alloys and
Compounds, 655, 141-147.
4. Gumus, C., Ozkendir, O. M., Kavak, H., and Ufuktepe, Y. (2006). Structural and optical properties of ZnO thin films prepared
by spray pyrolysis. Journal of optoelectronics and advanced materials. Vol. 8, No. 1, February 2006, p. 299 – 303.
5. Fujiwara, H., & Kondo, M. (2005). Effects of carrier concentration on the dielectric function of ZnO:Ga and In2O3:Sn studied
by spectroscopic ellipsometry: Analysis of free-carrier and band-edge absorption. Physical Review B, 71(7), 075109.
https://doi.org/10.1103/PhysRevB.71.075109.
6. Jellison, G. E. (1992). Optical functions of silicon determined by two-channel polarization modulation ellipsometry. Optical
Materials, 1(1),41-47. https://doi.org/10.1016/0925-3467(92)90015-F.
7. Minami, T. (2005). Transparent conducting oxide semiconductors for transparent electrodes. Semiconductor Science and
Technology, 20(4), S35. https://doi.org/10.1088/0268-1242/20/4/004.
8. A. Arslanov, Sh. Yuldashev, N. Botirova, R. Nusretov, J. Murodov, and J. Xudoyqulov, “Impact of precursor molar
concentration on the structural and optical properties of ZnO thin films synthesized by ultrasonic spray pyrolysis,” Physical
Science International Journal, 29(1), 29–35 (2025). https://doi.org/10.9734/psij/2025/v29i1871.
9. E. Rincon-Suarez, J.M. Mozo, Anabel Romero-López, S. Alcántara-Iniesta, Francisco J. Flores-Ruiz, L.E. Serrano.
Structural, optical and electrical properties of ZnO thin films deposited in the plane direction (002) by ultrasonic spray
pyrolysis using nitrogen as carrier gas. Materials Science and Engineering: B. Volume 320, October 2025, 118430.
https://doi.org/10.1016/j.mseb.2025.118430.
10. R. Pant, N. Patel, K.K. Nanda, and S.B. Krupanidhi, “Negative differential resistance and resistive switching in SnO₂/ZnO
interface,” Journal of Applied Physics, 122(12), (2017). https://doi.org/10.1063/1.5004969.
Copyright (c) 2026 «ACTA NUUz»
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
.jpg)
1.png)
