TY - JOUR
T1 - Modification of structure, electrical, linear and third-order nonlinear optical properties of spray pyrolyzed tin oxide films by deposition temperature
AU - Asha, Hind P.
AU - Gummagol, Neelamma B.
AU - Patil, Parutagouda Shankaragouda
AU - Rajendra, B. V.
N1 - Funding Information:
The authors express their gratitude to Manipal Institute of Technology (MIT), MAHE, Manipal, for providing the basic infrastructure as well as for providing the structure and surface morphology, optical characterization and thickness monitoring facilities. The authors are grateful to the UGC-DAE CSR , Mumbai Center, India for supplying financial aid via project no. UDCSR/MUM/AO/CRS-M-315/2020/813 and also the MAHE Manipal- UNSW Sydney Australia sanctioning seed fund for collaborative research work. Dr. P.S. Patil thanks Science and Engineering Research Board (SERB), Government of India, for Core Research Grant ( EMR/2017/003632 ). The authors also thank Dr. Sudha D Kamath for providing the PL characterization facility.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/7
Y1 - 2021/7
N2 - Highly transparent and conducting polycrystalline n-type SnO2 thin films with prominent peak corresponding to (1 1 0) plane was deposited using the simple spray pyrolysis technique. A systematic investigation was carried out in order to understand the influence of deposition temperature on the structure, surface morphology, composition, linear and third-order nonlinear optical (NLO) properties, photoluminescence and electrical characteristic of the deposited films. The rise in the deposition temperature led to increase in crystallinity and transmittance of the films. The films deposited at 450 °C showed the highest crystallite size, lesser dislocation density and fibrous surface morphology. The films deposited at 450 °C showed the highest transmittance of around 90% in the visible region and a direct energy band gap of 3.9 eV. Increase in the deposition temperature also reduced the film resistivity and enhanced the carrier concentration. The film deposited at 450 °C possessed the maximum carrier concentration of 2.04 × 1020 cm−3 and minimum resistivity of 0.2483 Ω cm. It was also observed that the deposition temperature influenced on photoluminescent emission and the third-order nonlinear properties of the films. The photoluminescence spectra analysis of the deposited films indicated the existence of oxygen vacancies and other defects which led to nearly a white light emission. The film deposited at 450 °C showed a nonlinear absorption coefficient, nonlinear refractive index and susceptibility of 0.72 cm/W, 5.74 × 10−3 cm2/W and 7.29 × 10−3 esu, respectively. These films exhibited optical limiting behaviour and the obtained least limiting threshold was 1.1 kJ/cm2. The results clearly showed the applicability of spray pyrolyzed SnO2 thin films deposited at 450 °C in optoelectronic and nonlinear devices.
AB - Highly transparent and conducting polycrystalline n-type SnO2 thin films with prominent peak corresponding to (1 1 0) plane was deposited using the simple spray pyrolysis technique. A systematic investigation was carried out in order to understand the influence of deposition temperature on the structure, surface morphology, composition, linear and third-order nonlinear optical (NLO) properties, photoluminescence and electrical characteristic of the deposited films. The rise in the deposition temperature led to increase in crystallinity and transmittance of the films. The films deposited at 450 °C showed the highest crystallite size, lesser dislocation density and fibrous surface morphology. The films deposited at 450 °C showed the highest transmittance of around 90% in the visible region and a direct energy band gap of 3.9 eV. Increase in the deposition temperature also reduced the film resistivity and enhanced the carrier concentration. The film deposited at 450 °C possessed the maximum carrier concentration of 2.04 × 1020 cm−3 and minimum resistivity of 0.2483 Ω cm. It was also observed that the deposition temperature influenced on photoluminescent emission and the third-order nonlinear properties of the films. The photoluminescence spectra analysis of the deposited films indicated the existence of oxygen vacancies and other defects which led to nearly a white light emission. The film deposited at 450 °C showed a nonlinear absorption coefficient, nonlinear refractive index and susceptibility of 0.72 cm/W, 5.74 × 10−3 cm2/W and 7.29 × 10−3 esu, respectively. These films exhibited optical limiting behaviour and the obtained least limiting threshold was 1.1 kJ/cm2. The results clearly showed the applicability of spray pyrolyzed SnO2 thin films deposited at 450 °C in optoelectronic and nonlinear devices.
UR - https://www.scopus.com/pages/publications/85105286776
UR - https://www.scopus.com/pages/publications/85105286776#tab=citedBy
U2 - 10.1016/j.spmi.2021.106920
DO - 10.1016/j.spmi.2021.106920
M3 - Article
AN - SCOPUS:85105286776
SN - 0749-6036
VL - 155
JO - Superlattices and Microstructures
JF - Superlattices and Microstructures
M1 - 106920
ER -