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Ain QU, Fazal T, Iqbal S, Mahmood S, Ismail B, Shah M, Khan AM, Bahadur A, Alotaibi KM, Alshalwi M. Novel yellowish-green single-phased spinel Mg 1-xBa xAl 2O 4:Mn 2+ phosphor(s) for color rendering white-light-emitting diodes. LUMINESCENCE 2024; 39:e4724. [PMID: 38523053 DOI: 10.1002/bio.4724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/27/2024] [Accepted: 02/26/2024] [Indexed: 03/26/2024]
Abstract
For white light-rendering research activities, interpretation by using colored emitting materials is an alternative approach. But there are issues in designing the white color emitting materials. Particularly, differences in thermal and decay properties of discrete red, green, and blue emitting materials led to the quest for the search of a single-phased material, able to emit primary colors for white light generation. The current study is an effort to design a simple, single-phase, and cost-effective material with the tunable emission of primary colors by a series of Mg1-xBaxAl2O4:Mn2+ nanopowders. Doping of manganese ion (Mn2+) in the presence of the larger barium cation (Ba2+) at tetrahedral-sites of the spinel magnesium aluminate (MgAl2O4) structure led to the creation of antisite defects. Doped samples were found to have lower bandgaps compared with MgAl2O4, and hybridization of 3d-orbitals of Mn2+ with O(2p), Mg(2s)/Al(2s3p) was found to be responsible for narrowing the bandgap. The distribution of cations at various sites at random results in a variety of electronic transitions between the valance band and oxygen vacancies as well as electron traps produced the antisite defects. The suggested compositions might be used in white light applications since they have three emission bands with centers at 516 nm (green), 464 nm (blue) and 622 nm (red) at an excitation wavelength of 380 nm. A detailed discussion to analyze the effects of the larger cationic radius of Ba2+ on the lattice strain, unit cell parameters, and cell volumes using X-ray diffraction analysis is presented.
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Affiliation(s)
- Qurat Ul Ain
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Tanzeela Fazal
- Department of Chemistry, Abbottabad University of Science and Technology, Abbottabad, Pakistan
| | - Shahid Iqbal
- Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, University of Nottingham Ningbo China, Ningbo, China
| | - Sajid Mahmood
- Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, University of Nottingham Ningbo China, Ningbo, China
- Functional Materials Group, Gulf University for Science and Technology, Mishref, Kuwait
| | - Bushra Ismail
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Mazloom Shah
- Department of Chemistry, Faculty of Science, Grand Asian University Sialkot, Sialkot, Pakistan
| | - Asad Muhammad Khan
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Ali Bahadur
- Department of Chemistry, College of Science, Mathematics, and Technology, Wenzhou-Kean University, Wenzhou, China
- Dorothy and George Hennings College of Science, Mathematics and Technology, Kean University, Union, New Jersey, USA
| | - Khalid M Alotaibi
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Matar Alshalwi
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
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Zvonarev S, Churkin V, Pankov V, Abramov A, Nikiforov S. The influence of synthesis modes of alumina ceramics doped with manganese on sensitivity to ionizing radiation. RADIAT MEAS 2020. [DOI: 10.1016/j.radmeas.2020.106410] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kato T, Takebuchi Y, Nakauchi D, Kawaguchi N, Yanagida T. Dosimetric properties of undoped and Tb-doped MgAl2O4 transparent ceramics. RADIAT MEAS 2020. [DOI: 10.1016/j.radmeas.2020.106341] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zvonarev S, Frolov E, Smirnov N, Chesnokov KY. The influence of magnesium doping on luminescent and dosimetric properties of alumina ceramics. RADIAT MEAS 2019. [DOI: 10.1016/j.radmeas.2019.04.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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