TY - JOUR
T1 - A negative-thermal-quenching LaMgAl11O19
T2 - Er3+, Sm3+ phosphor achieved by energy transfer from Er3+ to Sm3+
AU - Min, Xin
AU - Lao, Cheng Yen
AU - Liu, Yifei
AU - Ji, Haipeng
AU - Wu, Xiaowen
AU - Liu, Yan'gai
AU - Huang, Zhaohui
AU - Fang, Minghao
AU - Abdelkader, Amr M.
AU - Kumar, Ramachandran Vasant
AU - Xi, Kai
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2024/3
Y1 - 2024/3
N2 - 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.
AB - 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.
KW - Energy transfer
KW - Negative-thermal-quenching
KW - Phosphors
KW - wLEDs
UR - https://www.scopus.com/pages/publications/85180534211
U2 - 10.1016/j.jlumin.2023.120380
DO - 10.1016/j.jlumin.2023.120380
M3 - 文章
AN - SCOPUS:85180534211
SN - 0022-2313
VL - 267
JO - Journal of Luminescence
JF - Journal of Luminescence
M1 - 120380
ER -