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Effect of various cerium sources on the emission intensity of Ce3+-doped La3Si6N11 phosphor for high-power white light emitting diodes.
- Source :
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Physica B . Feb2021, Vol. 603, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
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Abstract
- La 3 Si 6 N 11 :Ce3+ (LSN:Ce3+) phosphor has attracted widespread attention in the field of high-power white light-emitting diodes as it can be effectively excited by blue LED chip and exhibits excellent thermal quenching. To improve the emission intensity is always the critical objective of La 3 Si 6 N 11 :Ce3+. In this paper, the strategy by combining CeO 2 and CeN as cerium sources of the activator was developed to enhance the emission intensity. The emission intensity of NO-LSN:Ce3+ is 112.8% of that of N-LSN:Ce3+, which benefits from the enhancement of the concentration of Ce3+ ions. Generally, more Ce4+ ions can enter into the lattice of La 3 Si 6 N 11 at high concentration due to the smaller ionic radius of Ce4+ than Ce3+. After that, Ce4+ ions can be effectively reduced to Ce3+ ions at high temperature. The luminescence improvement mechanism of as-prepared phosphors was analyzed. This research provides an effective method for improving the emission intensity of nitride or oxy-nitride phosphors. • The effects of CeO2 and CeN co-doping on emission intensity of LSN phosphor was first studied. • The mechanism of CeO2 and CeN co-doping LSN on emission intensity was analyzed. • This study provides a strategy for improving the emission intensity of LSN:Ce3+. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09214526
- Volume :
- 603
- Database :
- Academic Search Index
- Journal :
- Physica B
- Publication Type :
- Academic Journal
- Accession number :
- 148140514
- Full Text :
- https://doi.org/10.1016/j.physb.2020.412779