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- Title
Multiple energy transfer between CaNb<sub>2</sub>O<sub>6</sub>:Tb<sup>3+</sup>, Eu<sup>3+</sup> for single-component white light-emitting phosphors.
- Authors
Xiong, Ao; Tan, Jin; Han, Cong
- Abstract
A series of host-activated Tb3+ and Eu3+-co-doped CaNb2O6 (CNO) phosphors with tunable luminescence were synthesized via high-temperature solid-state method with the purpose of developing single-component phosphors for white light-emitting diode (LED) devices. Benefiting from blue broadband emission of CNO and multiple energy transfer of NbO43− → Tb3+ → Eu3+, white light-emitting CNO:Tb3+, Eu3+ phosphors were achieved by reasonably adjusting the doping content of Tb3+ and Eu3+ ions. Two typical white light-emitting phosphors, CNO:0.015Tb3+, 0.02Eu3+ with color coordinate (0.33, 0.33) and CNO:0.10Tb3+, 0.05Eu3+ with color coordinate (0.40, 0.39), could maintain 63% and 73% of the initial integral intensity at 150 °C and had good color stability. Subsequently, the representative CNO:0.015Tb3+, 0.02Eu3+ phosphors were successfully applied to a 275 nm ultraviolet chip to fabricate a white LED device with a low correlated color temperature of 3464 K and a high color rendering index of 86.0. The above results indicate that synthesized single-component white light-emitting CNO:Tb3+, Eu3+ phosphors have good application prospects in the field of white LED. Moreover, this strategy of using self-activated host and multiple energy transfer also provides guidance for the design of novel white light-emitting phosphors.
- Subjects
TERBIUM; PHOSPHORS; ENERGY transfer; LIGHT emitting diodes; DOPING agents (Chemistry); COLOR temperature; LUMINESCENCE
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 6, p3384
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-07536-4