Carbon ion implantation mediated blue photoluminescence (PL) and the corresponding bluish white phosphorescence of anodic aluminum oxide (AAO) are presented. In particular, the observed 465 nm luminescence is found to be more sensitive to carbon, while its lifetime is raised to its maximum from 6.7 to 10.4 μs at a fluence of 1 × 1016 ions/cm2. The observed phenomenon seems to be associated with the formation of oxygen vacancy (V0) via carbon ion enhanced modification of local AlO6 octahedral symmetry, as revealed from X-ray absorption spectroscopy at O-K edge, and also consistent with X-ray photoelectron spectroscopy (XPS). Detailed XPS analysis indicates the preference of carbon at the Al sites, rather than at O for both octahedral and tetrahedral structures, and form CAl cationic impurity, consistent with our density functional theory calculation. Further, carbon ion implantation driven enhanced PL lifetime is shown to be associated with energy transfer between V0 and the vicinal CAl. This work shows the potential of carbon doped AAO as a future candidate for developing rare earth free nontoxic phosphor.
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28 October 2019
Research Article|
October 29 2019
Revealing carbon mediated luminescence centers with enhanced lifetime in porous alumina
S. Bhowmick;
S. Bhowmick
1
Department of Physics, School of Natural Sciences, Shiv Nadar University
, NH-91, Tehsil Dadri, Gautam Buddha Nagar, Uttar Pradesh 201314, India
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S. Pal;
S. Pal
1
Department of Physics, School of Natural Sciences, Shiv Nadar University
, NH-91, Tehsil Dadri, Gautam Buddha Nagar, Uttar Pradesh 201314, India
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A. Singh;
A. Singh
2
Materials Research Centre, Indian Institute of Science
, Bangalore 560012, India
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M. Gupta;
M. Gupta
3
UGC-DAE Consortium for Scientific Research
, Khandwa Road, Indore, Madhya Pradesh 452001, India
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D. M. Phase;
D. M. Phase
3
UGC-DAE Consortium for Scientific Research
, Khandwa Road, Indore, Madhya Pradesh 452001, India
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A. K. Singh
;
A. K. Singh
2
Materials Research Centre, Indian Institute of Science
, Bangalore 560012, India
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A. Kanjilal
A. Kanjilal
a)
1
Department of Physics, School of Natural Sciences, Shiv Nadar University
, NH-91, Tehsil Dadri, Gautam Buddha Nagar, Uttar Pradesh 201314, India
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
J. Appl. Phys. 126, 164904 (2019)
Article history
Received:
June 24 2019
Accepted:
October 13 2019
Citation
S. Bhowmick, S. Pal, A. Singh, M. Gupta, D. M. Phase, A. K. Singh, A. Kanjilal; Revealing carbon mediated luminescence centers with enhanced lifetime in porous alumina. J. Appl. Phys. 28 October 2019; 126 (16): 164904. https://doi.org/10.1063/1.5116274
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