Effect of rotational speed on structural, morphological, and optical properties of solgel spin coated Sb doped SnO2 thin films
https://doi.org/10.17586/2220-8054-2025-16-5-660-668
Abstract
Antimony doped SnO2 (ATO) films were prepared on glass substrates by spin coating method at rotational speeds from 2000 to 3500 rpm. The impact of rotational speed on physical properties of Sb-doped SnO2 films were reported. XRD profiles of Sb-doped SnO2 films exhibits tetragonal rutile phase structure. The surface morphology shows homogeneous growth of the films with spherical structure, and an agglomeration of grains was observed at higher rotational speeds. Sb-doped SnO2 films prepared at 3500 rpm show an optimum transmittance of 82 % at visible region. The optical bandgap energy of Sb-doped SnO2 films were increased from 3.23 to 3.46 eV due to Burstein–Moss (B-M) effect. The electrical resistivity of Sb-doped SnO2 films were increased from 2.80 · 10−4 to 3.86 · 10−4 Ω·cm with an increase of rotational speed from 2000 to 3500 rpm.
Keywords
Sb-doped SnO2 films,
X-ray diffraction,
surface morphology,
optical properties,
electrical properties
Supporting agencies: The facilities (FESEM, AFM, and XPS) available at CeNSE, IISc, Bengaluru were utilized to perform this research work. The author also thanks to DST-FIST Program, Govt. of India for providing spectroscopic ellipsometer to GITAM.
About the Authors
D. Subramanyam
Bharathiar University; STSN Govt Degree College
India
India
Darla Subramanyam – Research and Development Centre; Department of Physics
Coimbatore, 641046, Tamil Nadu; Kadiri, 515591, Andhra Pradesh
B. Rajesh Kumar
School of Science, GITAM (Deemed to be University)
India
India
Borra Rajesh Kumar – Department of Physics
Visakhapatnam, 530 045, Andhra Pradesh
K. Chandrasekhara Reddy
Bharathiar University; Govt. Degree College, Uravakonda
India
India
Kuntalo Chandrasekhara Reddy – Research and Development Centre; Department of Physics
Coimbatore, 641046, Tamil Nadu; 515812, Anantapur, Andhra Pradesh
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For citations:
Subramanyam D., Rajesh Kumar B., Chandrasekhara Reddy K. Effect of rotational speed on structural, morphological, and optical properties of solgel spin coated Sb doped SnO2 thin films. Nanosystems: Physics, Chemistry, Mathematics. 2025;16(5):660-668. https://doi.org/10.17586/2220-8054-2025-16-5-660-668
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