A double perovskite Ca2MgWO6:Bi3+ yellow-emitting phosphor: Synthesis and luminescence properties

Cao, Renping; Quan, Guanjun; Shi, Zhongyuan; Luo, Zhiyang; Hu, Qianglin; Guo, Siling

doi:10.1016/j.jlumin.2016.09.046

Cited by 72 publications

(21 citation statements)

References 22 publications

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“…The VIS emission was identified in the literature as the emission corresponding to the 3 P 1,0 → 1 S 0 transitions of a free Bi 3+ ion [3,26,[28][29][30]36,39,40,42,43,124,127,130,[143][144][145][146][147][148][149][150][151][152][153], D-state emission [63,114,115,120,128,154], charge transfer emission [1,10,65,114,115,154], impurity-trapped or impurity-bound exciton emission [12,69,83,120,122,123,128,[154][155][156], MMCT emission [6,7,[63]…”

Section: On the Origin Of The Visible Luminescencementioning

confidence: 99%

Luminescence Spectroscopy and Origin of Luminescence Centers in Bi-Doped Materials

et al. 2020

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Bi-doped compounds recently became the subject of an extensive research due to their possible applications as scintillator and phosphor materials. The oxides co-doped with Bi3+ and trivalent rare-earth ions were proposed as prospective phosphors for white light-emitting diodes and quantum cutting down-converting materials applicable for enhancement of silicon solar cells. Luminescence characteristics of different Bi3+-doped materials were found to be strongly different and ascribed to electronic transitions from the excited levels of a Bi3+ ion to its ground state, charge-transfer transitions, Bi3+ dimers or clusters, radiative decay of Bi3+-related localized or trapped excitons, etc. In this review, we compare the characteristics of the Bi3+-related luminescence in various compounds; discuss the possible origin of the corresponding luminescence centers as well as the processes resulting in their luminescence; consider the phenomenological models proposed to describe the excited-state dynamics of the Bi3+-related centers and determine the structure and parameters of their relaxed excited states; address an influence of different interactions (e.g., spin-orbit, electron-phonon, hyperfine) as well as the Bi3+ ion charge and volume compensating defects on the luminescence characteristics. The Bi-related luminescence arising from lower charge states (namely, Bi2+, Bi+, Bi0) is also reviewed.

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Section: On the Origin Of The Visible Luminescencementioning

confidence: 99%

Luminescence Spectroscopy and Origin of Luminescence Centers in Bi-Doped Materials

et al. 2020

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“…Again, only a slight improvement of the reflectivity could be observed. For all three samples (12)(13)(14), the typical 4f-4f-transitions of Nd 3+ were observed. These were located at 530 nm ( 4 I 9/2 → 4 G 7/2 ), 590 nm ( 4 I 9/2 → 4 G 5/2 ), 685 nm ( 4 I 9/2 → 4 F 9/2 ), and 750 nm ( 4 I 9/2 → 4 F 7/2 ).…”

Section: Resultsmentioning

confidence: 84%

“…Ca 2 MgWO 6 (CMW) is a low-cost material with high chemical and physical stability, which can be synthesized by a rather simple synthesis pathway and which can be doped with transition metal ions as soon as with rare earth metal ions [10]. In the past, several phosphors with CMW host have been reported, such as CMW:Eu 3+ [11], CMW:Bi 3+ [12], CMW:Bi 3+ ,Sm 3+ [13], CMW:Bi 3+ ,Eu 3+ [14], CMW:Er 3+ ,Yb 3+ [15], and CMW:Mn 4+ [16]. Xu et al studied CMW:Cr 3+ and CMW:Cr 3+ ,Yb 3+ .…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Synthesis and Energy Transfer of Ca2MgWO6:Cr3+,Nd3+

Anselm

Jüstel

2021

Inorganics

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This work pertains to Cr3+ and Nd3+ co-activated Ca2MgWO6 phosphors synthesized by high temperature solid-state method using oxides and carbonates as raw materials. All luminescent samples according to Ca2MgWO6:Cr3+,Nd3+ include Cr3+ for the absorption of UV and visible radiation (230–800 nm) prior to energy transfer to Nd3+. As a result of the energy transfer between Cr3+ and Nd3+, we observe line emission originating from Nd3+ in the near infrared range additionally to the broad band near infrared emission from Cr3+ assigned to the spin-allowed 4T2 → 4A2 transition. The energy transfer from Cr3+ to Nd3+ is discussed via the variations of the lifetime data of Cr3+ and Nd3+. The strong absorption of Cr3+ in the ultraviolet range and the efficient energy transfer from Cr3+ to Nd3+ indicate that the herein presented material type can serve as a radiation converter for near infrared region light emitting diodes (NIR-LEDs) comprising an UV-A emitting (Al,Ga)N chip.

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“…As the doping concentration of Bi 3+ ions further increases, Bi 3+ ions will mainly occupy the sites of Ba 2+ ions, causing the lattice to shrink and the diffraction peak move to a large angle. The charge balance is maintained by trapping an interstitial O 2‐ ion to form pairs . These peak‐shift behaviors suggest that Bi 3+ ions have successfully entered the lattice of Ba 2 ZnGe 2 O 7 .…”

Section: Resultsmentioning

confidence: 97%

“…The charge balance is maintained by trapping an interstitial O 2ion to form pairs. 14,30 These peak-shift behaviors suggest that Bi 3+ ions have successfully entered the lattice of Ba 2 ZnGe 2 O 7 . Grain morphology is an important index of LED phosphor, and its dispersion and particle size will affect the coating and packaging of LED devices.…”

Section: Phase Identificationmentioning

confidence: 95%

A novel pale‐yellow Ba₂ZnGe₂O₇:Bi³⁺ phosphor with site‐selected excitation and small thermal quenching

Chen

Hande

et al. 2019

J Am Ceram Soc

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A novel pale‐yellow Ba2ZnGe2O7:Bi3+ phosphor with site‐selected excitation and small thermal quenching was synthesized by conventional solid‐state sintering. The crystal structure and luminescence properties have been investigated in detail for the first time using XRD patterns, photoluminescence spectra, diffuse reflection spectra, decay curves, and temperature‐dependent emission spectra. The results reveal that the excitation spectrum of Ba2ZnGe2O7:Bi3+ phosphor locates in the near‐ultraviolet region of 300‐400 nm, and its emission shows an obvious site‐selective excitation phenomenon since Bi3+ ions occupy two different crystallographic sites in the Ba2ZnGe2O7 host. When excited under 360 nm, the phosphors show a pale‐yellow emission in the range of 400‐700 nm with the maximum peaking at 520 nm, while when excited under 316 nm, the phosphors show a blue emission in the range of 400‐700 nm with the maximum peaking at 480 nm. In addition, the emission of Ba2ZnGe2O7:Bi3+ can also be easily controlled by changing the Bi3+ concentration. The Ba2ZnGe2O7:Bi3+ phosphor has small thermal quenching, and its emission intensity only decreases by 2% at 200°C. The results indicate that this novel pale‐yellow Ba2ZnGe2O7:Bi3+ phosphor could be conducive to the development of white light‐emitting diodes.

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A double perovskite Ca2MgWO6:Bi3+ yellow-emitting phosphor: Synthesis and luminescence properties

Cited by 72 publications

References 22 publications

Luminescence Spectroscopy and Origin of Luminescence Centers in Bi-Doped Materials

Luminescence Spectroscopy and Origin of Luminescence Centers in Bi-Doped Materials

Optimization of the Synthesis and Energy Transfer of Ca2MgWO6:Cr3+,Nd3+

A novel pale‐yellow Ba₂ZnGe₂O₇:Bi³⁺ phosphor with site‐selected excitation and small thermal quenching

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