TY - JOUR
T1 - Micro-strain administered SHG intensity enhancement by heavy Ce doping in co-precipitated ZnO nanoparticles
AU - Chattopadhyay, Saikat
AU - Kumawat, Ashok
AU - Misra, Kamakhya Prakash
AU - Halder, Nilanjan
AU - Bandyopadhyay, Atul
AU - Antony, Albin
AU - Rao, Ashok
AU - Poornesh, P.
AU - Jedryka, J.
AU - Ozga, K.
AU - Kucharska, B.
AU - Misra, R. D.K.
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/4
Y1 - 2021/4
N2 - The objective of the present study is to explore the non-linear behaviour of Ce-doped ZnO system. Undoped and Ce-doped ZnO nanoparticles of size ~23–70 nm were prepared by sol-gel co-precipitation approach. There was complete absence of Ce-containing phase until 3 at.% dopant. Band-gap decreased in a linear manner from 3.262 to 3.212 eV on doping with Ce. Emission peaks at 360 and 380 nm were observed in the PL spectra. However, at 7 at.% dopant, CeO2 and Ce2O3 were observed. Interestingly, a significant increase in second harmonic generation (SHG) signal intensity of ~3.5 times was observed when the dopant concentration was increased from 3 to 7 at.% in ZnO nanoparticles. The SHG signal in doped-ZnO was governed by micro-strain such that it increased with decrease of micro-strain and vice-versa. The dependence of ZnO morphology and SHG intensity on Ce-dopant concentration in ZnO has potential for applications in bio-imaging and bio-sensing.
AB - The objective of the present study is to explore the non-linear behaviour of Ce-doped ZnO system. Undoped and Ce-doped ZnO nanoparticles of size ~23–70 nm were prepared by sol-gel co-precipitation approach. There was complete absence of Ce-containing phase until 3 at.% dopant. Band-gap decreased in a linear manner from 3.262 to 3.212 eV on doping with Ce. Emission peaks at 360 and 380 nm were observed in the PL spectra. However, at 7 at.% dopant, CeO2 and Ce2O3 were observed. Interestingly, a significant increase in second harmonic generation (SHG) signal intensity of ~3.5 times was observed when the dopant concentration was increased from 3 to 7 at.% in ZnO nanoparticles. The SHG signal in doped-ZnO was governed by micro-strain such that it increased with decrease of micro-strain and vice-versa. The dependence of ZnO morphology and SHG intensity on Ce-dopant concentration in ZnO has potential for applications in bio-imaging and bio-sensing.
UR - https://www.scopus.com/pages/publications/85099676909
UR - https://www.scopus.com/pages/publications/85099676909#tab=citedBy
U2 - 10.1016/j.mseb.2021.115041
DO - 10.1016/j.mseb.2021.115041
M3 - Article
AN - SCOPUS:85099676909
SN - 0921-5107
VL - 266
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
M1 - 115041
ER -