TY - JOUR
T1 - Cr3+ doped Al2O3 nanoparticles
T2 - Effect of Cr3+ content in intensifying red emission
AU - Lewis, Prinston Melroy
AU - N, Keerthana
AU - Hebbar N, Deepak
AU - Choudhari, K. S.
AU - Kulkarni, Suresh D.
N1 - Funding Information:
We gratefully acknowledge financial support from 1. SERB, DST, Govt. of India through the projects SB/S2/CMP-017/2014 and SB/FT/CS-123/2013; 2. Joint Manipal Academy of Higher Education and DST-FIST (Govt. of India) Program via approval letter SR/FST/PSI-174/2012; 3. From I-CUP, the Indian Cluster for Ultrafast Photonics, supported by the Office of the Principal Scientific Adviser to the Government of India, for providing UV?VIS?NIR spectrophotometer. Prinston Melroy Lewis sincerely thanks Manipal Academy of Higher Education for Dr. T. M. A. Pai Scholarship and DOM, Govt. of Karnataka for the fellowship DOM/FELLOWSHIP/CR-76/2018?19.
Funding Information:
We gratefully acknowledge financial support from 1. SERB , DST, Govt. of India through the projects SB/S2/CMP-017/2014 and SB/FT/CS-123/2013; 2 . Joint Manipal Academy of Higher Education and DST-FIST (Govt. of India) Program via approval letter SR/FST/PSI-174/2012; 3 . From I-CUP, the Indian Cluster for Ultrafast Photonics, supported by the Office of the Principal Scientific Adviser to the Government of India, for providing UV–VIS–NIR spectrophotometer. Prinston Melroy Lewis sincerely thanks Manipal Academy of Higher Education for Dr. T. M. A. Pai Scholarship and DOM, Govt. of Karnataka for the fellowship DOM /FELLOWSHIP/ CR-76/2018–19 .
Publisher Copyright:
© 2021 Korean Physical Society
PY - 2021/12
Y1 - 2021/12
N2 - Cr3+-doped α-Al2O3 nanoparticles (Al2−xCrxO3, 0.005 ≤ x ≤ 0.05) were synthesized by co-precipitation method. X-ray diffraction (XRD) patterns of Cr3+:Al2O3 nanoparticles revealed the crystallite size of ∼53 nm and electron microscopy (SEM & TEM) confirmed the spherical nanoparticle formation. Diffuse reflectance spectra (DRS) displayed peaks at 406 and 558 nm corresponding to the Cr3+ transitions which became prominent with the increase in Cr3+ concentration which was also evidenced by the gradually increasing pink coloration of the samples. Photoluminescence (PL) studies showed the sharp red emission at 694 nm (ruby line) which was observed for all samples. The Dq/B value for all samples was found to be greater than 2.3 confirming the presence of Cr3+ ions in the octahedral sites. Chromaticity diagrams displayed the maximum red appearance for the sample with x = 0.01 and a lifetime of 4 ms. The synthesized Cr3+:Al2O3 nanoparticles with smaller crystallite sizes and narrow near monochromatic emission can be used in various applications including sensing, lasing, and bioimaging applications.
AB - Cr3+-doped α-Al2O3 nanoparticles (Al2−xCrxO3, 0.005 ≤ x ≤ 0.05) were synthesized by co-precipitation method. X-ray diffraction (XRD) patterns of Cr3+:Al2O3 nanoparticles revealed the crystallite size of ∼53 nm and electron microscopy (SEM & TEM) confirmed the spherical nanoparticle formation. Diffuse reflectance spectra (DRS) displayed peaks at 406 and 558 nm corresponding to the Cr3+ transitions which became prominent with the increase in Cr3+ concentration which was also evidenced by the gradually increasing pink coloration of the samples. Photoluminescence (PL) studies showed the sharp red emission at 694 nm (ruby line) which was observed for all samples. The Dq/B value for all samples was found to be greater than 2.3 confirming the presence of Cr3+ ions in the octahedral sites. Chromaticity diagrams displayed the maximum red appearance for the sample with x = 0.01 and a lifetime of 4 ms. The synthesized Cr3+:Al2O3 nanoparticles with smaller crystallite sizes and narrow near monochromatic emission can be used in various applications including sensing, lasing, and bioimaging applications.
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U2 - 10.1016/j.cap.2021.10.003
DO - 10.1016/j.cap.2021.10.003
M3 - Article
AN - SCOPUS:85117708259
SN - 1567-1739
VL - 32
SP - 71
EP - 77
JO - Current Applied Physics
JF - Current Applied Physics
ER -