A study of negative-thermal-quenching (Ba/Ca)AlSiON:Eu phosphors.

Dalton Trans

Zhejiang Academy of Special Equipment Science, Hangzhou 314415, China.

Published: December 2021

Phosphor is an important part of the new generation of light-emitting diodes (LEDs), which requires high luminous intensity and high-temperature resistance. In this study, a series of excellent (BaCa)AlSiON:Eu phosphors was developed, which were synthesized by a high-temperature solid-state reaction in a reducing atmosphere. In addition, the crystallinity and luminescence intensity of the samples could be enhanced by some amount of Ca substitution. The luminescence intensity was the highest when the Eu concentration reached 0.06. Furthermore, the thermal stability of the luminescence was studied in detail. The results were satisfactory, showing that the luminescence intensity of the (BaCa)AlSiON:Eu phosphors exhibited unique negative-thermal-quenching characteristics both at high (273-473 K) and low (4-273 K) temperatures. And the phosphor combined with UV LED chip and red phosphor SrSiN:Eu can achieve a CRI of 90.4 in white LED application which indicated the (BaCa)AlSiON:Eu phosphor has potential in LED applications.

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http://dx.doi.org/10.1039/d1dt02752bDOI Listing

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