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A negative-thermal-quenching LaMgAl11O19: Er3+, Sm3+ phosphor achieved by energy transfer from Er3+ to Sm3+.

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
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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