Novel double perovskite Sr3WO6:Sm3+, Na+ orange-red emitting phosphors with high thermal stability for white LEDs

•Sr3WO6:Sm3+ phosphors can be firstly synthesized via solid-state reaction.•The phosphor emits bright orange-red light at 407 nm excitation.•The phosphor possesses excellent thermal stability.•The w-LEDs exhibit good color rending index and low correlated color temperature. Over the years, phosphor-...

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Bibliographic Details
Published in:Journal of alloys and compounds 2022-04, Vol.899, p.162739, Article 162739
Main Authors: Jin, Xiaoyue, Xie, Yan, Tang, Rong, Geng, Xue, Che, Junzhi, Lou, Liyang, Chen, Wensheng, Deng, Bin, Yu, Ruijin
Format: Article
Language:English
Subjects:
Color temperature
Double perovskite
Light emitting diodes
Luminescence
Optical properties
Perovskites
Phosphors
Solid state
Sr3WO6:Sm3+, Na+
Thermal stability
Tungstate
White light
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Summary:•Sr3WO6:Sm3+ phosphors can be firstly synthesized via solid-state reaction.•The phosphor emits bright orange-red light at 407 nm excitation.•The phosphor possesses excellent thermal stability.•The w-LEDs exhibit good color rending index and low correlated color temperature. Over the years, phosphor-converted white light-emitting diodes (pc-WLEDs) have attracted much attention due to their excellent luminescent performance. Meanwhile, there is an intent requirement for studying novel red phosphors for WLED with good luminescence properties and without harsh synthesis methods. In this work, a kind of novel double perovskite Sr3WO6:Sm3+, Na+ phosphor was synthesized with a solid-state reaction. The phase purity, morphology, luminescent properties of synthesized phosphors were investigated systematically. At 407 nm excitation, the Sr3WO6:Sm3+, Na+ phosphors exhibited orange-red light (655 nm) attributed to the transition of 4G5/2 → 6H7/2. The optimal doping concentration was 0.02 mol. The quenching temperature (T0.5) of Sr3WO6:0.02Sm3+, 0.02Na+ phosphor was beyond 500 K, which showed the excellent thermal stability of this phosphor. A WLED was fabricated with the phosphor, and related parameters were obtained. The fabricated WLED had a high general color rendering index (Ra = 89) and good correlated color temperature (CCT) (5297 K). Therefore, Sr3WO6:Sm3+, Na+ phosphors were promising candidates for near-ultraviolet (NUV) chip-based WLED and solid-state lighting.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2021.162739