Journal
OPTICAL MATERIALS
Volume 85, Issue -, Pages 96-99Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2018.08.050
Keywords
Photo-luminescent properties; Red-emitting phosphor; Oxyfluorides; Light-emitting diodes
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Funding
- National Natural Science Foundation of China [21661033]
- National Natural Science Foundation of China-Yunnan Provinces [U1702254]
- Applied Basic Research Project of Yunnan Province [2017FB017]
- 2017 Undergraduate Training Program for Innovation and Entrepreneurship of Yunnan Province
- 2018 Undergraduate Training Program for Innovation and Entrepreneurship of Yunnan Province
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Novel red-emitting phosphor Cs2NbOF5:Mn4+ was prepared via the ion exchange method, and its crystal structure, composition and morphology were characterized by powder X-ray diffraction, energy-dispersive X-ray spectroscopy and scanning electron microscopy. Meanwhile, the influence of Mn4+ molar ratio on luminescence properties of Cs2NbOF5:Mn4+ has been investigated. The phosphor prepared with the Nb2O5/K2MnF6 molar ratio of 20:1 can emit intense red light under blue light excitation and improve the performances of white light emitting diode with high color rendering index of 88.4 and low correlated color temperature of 3631 K, so this new red-emitting phosphor could find application on solid-state emitting diode.
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