High-brightness red-emitting double-perovskite phosphor Sr2LaTaO6:Eu3+ with high color purity and thermal stability [Invited]

Zongjie Zhang; Wei Li; Nan Ma; Xiaoyong Huang

doi:doi:10.3788/COL202119.030003

Chinese Optics Letters, 2021, 19 (3): 030003, Published Online: Feb. 22, 2021

High-brightness red-emitting double-perovskite phosphor Sr₂LaTaO₆:Eu³⁺ with high color purity and thermal stability [Invited] Download： 598次

Zongjie Zhang Wei Li Nan Ma Xiaoyong Huang ^*

Author Affiliations

College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China

Sr2LaTaO6 Eu3+ double-perovskite phosphors

Abstract

Bright

{Eu}^{3 +}

-activated double-perovskite

{Sr}_{2} {LaTaO}_{6}

red-emitting phosphors were successfully synthesized by a high-temperature solid-state method. Under near-ultraviolet excitation at 394 nm, optimal

{Sr}_{2} {LaTaO}_{6} : 0.2 {Eu}^{3 +}

phosphors emitted high-brightness red light around 613 nm with the International Commission on Illumination chromaticity coordinates (0.650, 0.349). Notably, the color purity can reach 92%. Impressively, the favorable thermal stability of the

{Sr}_{2} {LaTaO}_{6} : 0.2 {Eu}^{3 +}

phosphors was characterized by temperature-dependent emission spectra at different temperatures from 303 to 463 K, and the emission intensity at 423 K remained 73% of its value at 303 K. All of the results suggested that the as-prepared

{Sr}_{2} {LaTaO}_{6} : 0.2 {Eu}^{3 +}

phosphors can be used in near-ultraviolet-excitable white light-emitting diodes as a red-emitting color converter.

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Zongjie Zhang, Wei Li, Nan Ma, Xiaoyong Huang. High-brightness red-emitting double-perovskite phosphor Sr₂LaTaO₆:Eu³⁺ with high color purity and thermal stability [Invited][J]. Chinese Optics Letters, 2021, 19(3): 030003.

High-brightness red-emitting double-perovskite phosphor Sr₂LaTaO₆:Eu³⁺ with high color purity and thermal stability [Invited] Download： 598次

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