Premium
New apatite‐type phosphor Ca 9 La(PO 4 ) 5 (SiO 4 )F 2 :Tb 3+ ,Dy 3+ with improved color rendering index
Author(s) -
Zhang Yuanyuan,
Mei Lefu,
Aksenov Sergey M.,
Deyneko Dina,
Liu Haikun,
Zhang Dian,
Huang Zhaohui
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16948
Subject(s) - phosphor , analytical chemistry (journal) , luminescence , emission spectrum , ion , fluorescence , light emitting diode , ultraviolet , materials science , color temperature , chemistry , spectral line , optoelectronics , optics , physics , organic chemistry , chromatography , astronomy
Ca 9 La(PO 4 ) 5 (SiO 4 )F 2 :Tb 3+ ,Dy 3+ (CLPSF:Tb 3+ ,Dy 3+ ) phosphors were successfully prepared using the traditional solid‐state technique. The crystal structure was refined and the luminescence properties have been examined in detail. The band gap and electronic structure of Ca 9 La(PO 4 ) 5 (SiO 4 )F 2 were performed by the periodic density functional theory (DFT) calculation. The spectral and fluorescence decay dynamics of CLPSF:Tb 3+ ,Dy 3+ show that the energy transfer behavior between Tb 3+ and Dy 3+ ions is observed. The CLPSF:Tb 3+ ,Dy 3+ phosphors can be efficiently excitable at the wavelengths range from 300 to 500 nm. The emission spectrum covers the whole visible part of the spectra with the sharp emission bands in red, green, and blue regions. The correlated color temperature (CCT) and color rendering index (CRI) of white light emission could be improved by the fine‐tuning of the Tb 3+ and Dy 3+ ions ration in accordance with the energy transfer behavior. Thus, the CLPSF:Tb 3+ ,Dy 3+ phosphor could be used as a material for the near‐ultraviolet ( n ‐UV) and white light‐emitting diodes ( w ‐LEDs).