articleAdvanced MaterialsApr 15, 2022GREEN OA

Near‐Infrared Light‐Emitting Diodes utilizing a Europium‐Activated Calcium Oxide Phosphor with External Quantum Efficiency of up to 54.7%

JQJianwei QiaoSZShuai ZhangXZXinquan ZhouWCWeibin ChenRGRomain Gautier

South China University of Technology · Centre National de la Recherche Scientifique · +2 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

Abstract Near‐infrared (NIR) luminescence materials with broadband emissions are necessary for the development of light‐emitting diodes (LEDs) based light sources. However, most known NIR‐emitting materials are limited by their low external quantum efficiency. This work demonstrates how the photoluminescence quantum efficiency of europium‐activated calcium oxide (CaO:Eu) NIR phosphor can be significantly improved and stabilized at operating temperatures of LEDs. A carbon paper wrapping technology is innovatively developed and used during the solid‐state sintering to promote the reduction of Eu 3+ into Eu 2+ . In parallel, the oxygen vacancies in the CaO lattice are repaired utilizing GeO 2 decomposition.…

Citation impact

303
total citations
FWCI
21.17
Percentile
100%
References
34
Citations per year

Authors

6

Topics & keywords

Topics
Keywords
  • Phosphor
  • Materials science
  • Light-emitting diode
  • Quantum efficiency
  • Optoelectronics
  • Europium
  • Luminescence
  • Diode
No related works found for this paper.

Funding