Novel green-emitting phosphor Na2CaGe6O14: Tb3+ with high thermal stability by assistant of carriers from traps

Thermal stability is the main problem affecting the application of inorganic fluorescent materials in high-power LED devices. Here, we have synthesized a green light-emitting phosphor Na 2 Ca 1-x Ge 6 O 14 : xTb 3+ with high luminescence thermal stability mainly through high temperature solid-state...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2022-08, Vol.128 (8), Article 732
Main Authors: Liu, Biaojie, Yang, Guoren, Meng, Xianwei, Si, Yunfei
Format: Article
Language:English
Subjects:
Applied physics
Characterization and Evaluation of Materials
Condensed Matter Physics
Fluorescence
High temperature
Machines
Manufacturing
Materials science
Nanotechnology
Optical and Electronic Materials
Phosphors
Physics
Physics and Astronomy
Processes
Surfaces and Interfaces
Thermal stability
Thin Films
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Summary:Thermal stability is the main problem affecting the application of inorganic fluorescent materials in high-power LED devices. Here, we have synthesized a green light-emitting phosphor Na 2 Ca 1-x Ge 6 O 14 : xTb 3+ with high luminescence thermal stability mainly through high temperature solid-state reaction. By changing the concentration of doping ions, the traps concentration of the material can be increased, so that the thermal stability of the material can be improved, which is attributed to the traps compensating greater than the thermal quenching effect. This method of utilizing traps to improve thermal stability provides a potential synthesis strategy for improving high-power white LED used in automotive.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-022-05868-4