Min, X., Lao, C-Y., Liu, Y., Ji, H., Wu, X., Liu, Y., Huang, Z., Fang, M., Abdelkader, A. M., Kumar, R. V. and Xi, K., 2024. A negative-thermal-quenching LaMgAl11O19: Er3+, Sm3+ phosphor achieved by energy transfer from Er3+ to Sm3+. Journal of Luminescence, 267, 120380.
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DOI: 10.1016/j.jlumin.2023.120380
Abstract
Phosphor-converted white light-emitting diodes (pc-wLEDs) are drawing ever-increasing attention towards electronic applications. However, thermal quenching, the intensity decay with increasing temperature, presents a significant challenge for high power operation. We reverse the effect with a negative-thermal-quenching property based on energy transfer from one luminescent center to another center. The LaMgAl11O19: Er3+, Sm3+ (LMA: LaMgAl11O19: Er3+, Sm3+) phosphor has been designed, which shows a positive relationship between emission intensity and operating temperature up to 573 K (300 °C). As the temperature rises, energy transfer from Er3+ to Sm3+ occurs with higher efficiency because of stronger ionic vibration. As a result, the phosphor luminescence intensity at elevated temperatures is enhanced. Our design for negative-thermal quenching phosphor laid the foundation for the research of high-power pc-wLEDs or lasers at higher temperatures. It also has potential for wide-temperature-sensing-range radiometric optical thermometry applications.
Item Type: | Article |
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ISSN: | 0022-2313 |
Group: | Faculty of Science & Technology |
ID Code: | 39488 |
Deposited By: | Symplectic RT2 |
Deposited On: | 07 Feb 2024 13:52 |
Last Modified: | 07 Feb 2024 13:52 |
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