摘要
Exploring outstanding rare-earth activated inorganic phosphors with good thermostability has always been a research focus for high-power white light-emitting diodes(LEDs).In this study,we report a Sm^(3+)-activated KNa_(4)B_(2)P_(3)O_(13)(KNBP)powder phase.Its particle morphology,photoluminescence properties,concentration quenching mechanism,thermal quenching mechanism,and chromatic properties are demonstrated.Upon the near-ultraviolet(NUV)irradiation of 402 nm,the powder phase exhibits orange-red visible luminescence performance,originating from typical ^(4)G_(5/2)→^(6)H_(J/2)(J=5,7,9)transitions of Sm^(3+).Importantly,the photoluminescence performance has good thermostability,low correlated color temperature(CCT),and high color purity(CP),indicating its promising application in the NUV-pumped warm white LEDs.
基金
financially supported by the National Natural Science Foundation of China(Nos.21761034 and 22165031)
the Open Foundation of Key Laboratory for Micro/Nano Materials&Technology of Yunnan Province(No.2021KF01)
the Program for Excellent Young Talents,Yunnan University.
