TY - JOUR
T1 - A systematic investigation on structural, electrical, linear and nonlinear optical properties of Zn:CdO thin films for optoelectronic applications
AU - Nagaraja, B. S.
AU - Gurumurthy, S. C.
AU - Bairy, Raghavendra
AU - Ramam, Koduri
AU - K, Bindu
AU - Rao, Ashok
N1 - Funding Information:
The author Nagaraja B S would like to thank NMAM Institute of Technology, Nitte, Karkala, Karnataka, India for providing the research facilities and encouragement to carry out the study. The authors are grateful to Mangalore University DST-PURSE laboratory for providing the FESEM facility. One of the authors (AR) acknowledges DST – FIST grant (SR/FIST/PS-1/2017/8) for the given financial support which was required to carry out this work.
Funding Information:
The author Nagaraja B S would like to thank NMAM Institute of Technology, Nitte, Karkala, Karnataka, India for providing the research facilities and encouragement to carry out the study. The authors are grateful to Mangalore University DST-PURSE laboratory for providing the FESEM facility. One of the authors (AR) acknowledges DST ? FIST grant (SR/FIST/PS-1/2017/8) for the given financial support which was required to carry out this work.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/12
Y1 - 2021/12
N2 - In the present work, a systematic study on structural, electrical, linear, and nonlinear optical properties of Zn doped CdO thin films prepared by Spray Pyrolysis (SP) technique is reported. X-ray diffraction (XRD) studies revealed the cubic, wurtzite structure, and polycrystalline nature of all the films. The observed results showed a decrease in lattice constant and unit cell volume with an increase in Zn doping concentration. Morphology study confirms uniform distribution of spherical grain-like structure with small voids. An increase in direct and indirect bandgap is observed with doping concentration up to 5 wt%, and the trend reverses at higher concentration. The significant effect of Zn doping on optical parameters such as absorption coefficient, extension coefficient, refractive index, optical dielectric constant, and optical conductivities are calculated for all thin films. Further, the optical studies were used to analyze the linear susceptibility, third-order nonlinear optical susceptibility, and nonlinear refractive index of the films. The observed values for χ(1),χ(3) and n2 are in the range from 0.03 to 0.09 esu, 3.51×10−16 to 1.02×10−14 esu, and 1.09×10−14 to 2.67×10−13 esu for pure and Zn doped thin films respectively. Hall coefficient and electrical studies indicate that the Zn doping influences the electrical properties. An n-type and ohmic behavior is also observed for these films. Optical and electrical results suggest that these Zn:CdO films can be a potential candidate for optoelectronic applications.
AB - In the present work, a systematic study on structural, electrical, linear, and nonlinear optical properties of Zn doped CdO thin films prepared by Spray Pyrolysis (SP) technique is reported. X-ray diffraction (XRD) studies revealed the cubic, wurtzite structure, and polycrystalline nature of all the films. The observed results showed a decrease in lattice constant and unit cell volume with an increase in Zn doping concentration. Morphology study confirms uniform distribution of spherical grain-like structure with small voids. An increase in direct and indirect bandgap is observed with doping concentration up to 5 wt%, and the trend reverses at higher concentration. The significant effect of Zn doping on optical parameters such as absorption coefficient, extension coefficient, refractive index, optical dielectric constant, and optical conductivities are calculated for all thin films. Further, the optical studies were used to analyze the linear susceptibility, third-order nonlinear optical susceptibility, and nonlinear refractive index of the films. The observed values for χ(1),χ(3) and n2 are in the range from 0.03 to 0.09 esu, 3.51×10−16 to 1.02×10−14 esu, and 1.09×10−14 to 2.67×10−13 esu for pure and Zn doped thin films respectively. Hall coefficient and electrical studies indicate that the Zn doping influences the electrical properties. An n-type and ohmic behavior is also observed for these films. Optical and electrical results suggest that these Zn:CdO films can be a potential candidate for optoelectronic applications.
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U2 - 10.1016/j.optmat.2021.111669
DO - 10.1016/j.optmat.2021.111669
M3 - Article
AN - SCOPUS:85118754121
SN - 0925-3467
VL - 122
JO - Optical Materials
JF - Optical Materials
M1 - 111669
ER -