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A novel red emitting phosphor LiBaB 9 O 15 :Sm 2+ /Sm 3+ , li + with broad excitation band for white LEDs
Author(s) -
Li Ting,
Wang Zhijun,
Li Panlai,
Xu Shuchao,
Bai Qiongyu,
Yang Zhiping
Publication year - 2018
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3432
Subject(s) - phosphor , chromaticity , luminescence , x ray photoelectron spectroscopy , analytical chemistry (journal) , excitation , materials science , light emitting diode , chemistry , optoelectronics , nuclear magnetic resonance , optics , physics , chromatography , quantum mechanics
A novel tunable red emitting phosphor LiBaB 9 O 15 :Sm 2+ /Sm 3+ , Li + with broad excitation band was synthesized by a high temperature solid‐state method. Luminescence properties were investigated in detail by luminescence, X‐ray photoelectron spectroscopy (XPS) spectra and CIE chromaticity coordinates. XPS data confirmed that there were Sm 3+ in LiBaB 9 O 15 :Sm 3+ and Sm 2+ /Sm 3+ in LiBaB 9 O 15 :Sm 2+ /Sm 3+ , respectively. Spectral property of LiBaB 9 O 15 :Sm 3+ , LiBaB 9 O 15 :Sm 3+ /Sm 2+ and LiBaB 9 O 15 :Sm 2+ , Li + presented that the excitation band of Sm 3+ widened and the excitation band of Sm 2+ ranged from 350 to 450 nm. And the red light color is tunable with changing Li + concentration. The results indicated that LiBaB 9 O 15 :Sm 2+ /Sm 3+ , Li + may be promising red phosphor for white light emitting diodes.