Resonant energy transfer from Ce3+→Dy3+ and Mn2+ in NaZnSO4Cl chlorosulphate phosphor

Gedam, S.C.; Dhoble, S.J.; Park, K.

doi:10.1016/j.jlumin.2013.02.010

Cited by 15 publications

(3 citation statements)

References 22 publications

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“…In addition, based on previous emission spectra as shown in Figure and Figure , energy transfer from Ce 3+ →Eu 2+ in a Ba 2 P 2 O 7 sample is also expected to exist. It is well known that white light emission can be obtained through mixing tricolor (RGB) light at a suitable ratio . Energy transfers from Ce 3+ →Eu 2+ , Eu 2+ →Tb 3+ and Ce 3+ →Tb 3+ in the Ba 2 P 2 O 7 system may be a route to influence and realize color‐tunable and tri‐chromatic emission.…”

Section: Resultsmentioning

confidence: 99%

Luminescent properties of single‐phase Ba_{2‐x‐1.5y‐1.5z}P₂O₇:xEu²⁺,yCe³⁺, zTb³⁺ phosphors for white light‐emitting diode

et al. 2017

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Abstractpoor color rendering index and low stability of CCT. [1,4] Given that issue, it is necessary to explore single-phase white emissive phosphors for application in w-LEDs.Numerous efforts have previously been made to develop codoped single-phase white-emitting phosphors. [5,6] However, with the tri-doped phosphor it is easier to achieve tri-chromatic (RGB) emission with complete coverage when compared with co-doped phosphors. It is well known that the mixture of RGB emissions is more beneficial to generate an ideal warm white-light emission according to trichromatic theory. [7] Hence, more researchers have devoted themselves to developing the more complex tri-doped single-phase white-emitting phosphors. For example, Jiang and colleagues [8] It is a known reality that most phosphors are prepared via a conventional solid-state route, which has unavoidable disadvantages such as high synthesis temperature, nonhomogeneous mixtures and uncontrollable morphology. In particular, the obtained particles are very large with sizes in the range 1-10 μm. [9,10] In recent years, more researchers have focused on the co-precipitation method, which can overcome the above disadvantages and obtain nanophosphors with excellent luminescence properties. [9][10][11][12][13][14] Among these, Yi and colleagues [15] short, the co-precipitation method is very safe, energy-saving, timesaving option.At present, the most common hosts are aluminate and silicate systems with high stability and high QE. [16] But their synthesis conditions are harsh, in particular the synthesis temperatures are often as high as 1300°C. [17] Other materials, such as tungsten phosphate and rare earth oxides, can be easily synthesized, however they are chemically instable.[18] Barium pyrophosphate is a promising host for luminescent materials due to its low sintering temperature and stability. [18][19][20] Among the trivalent rare earth ions, Tb 3+ ion has been used frequently as the green emission center owing to its predominant 5 D 4 ! 7 F 5 transition with a peak centered at 545 nm. However, because of the forbidden transition and the weak absorption of Tb 3+ ion in the NUV region, the emission efficiency is low. [20,21] As is well known, Ce 3+ and Eu 2+ are often considered as the most important activator and effective sensitizer for Tb 3+ because of their unique electronic energy levels. [22][23][24][25] To the best of our knowledge, the crystal structures and lumines- | CharacterizationThe crystal phase of phosphor sample was analyzed by a SHIMADZU XRD-6000 diffractometer (Shimadzu Co., Japan) with Ni-filtered Cu single-phase. Ba 2 P 2 O 7 crystallized as a hexagonal structure with a space group p-62m and the lattice parameters were determined to be a = b = 9.415Å, c = 7.078Å, the crystal structure diagram of which is presented in Figure 2(a). The hexagonal form of Ba 2 P 2 O 7 signified that the sample host was at a higher temperature phase as σ-Ba 2 P 2 O 7 .Ba ions have two different types of coordination environments, in which one is coordinated b...

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Section: Resultsmentioning

confidence: 99%

Luminescent properties of single‐phase Ba_{2‐x‐1.5y‐1.5z}P₂O₇:xEu²⁺,yCe³⁺, zTb³⁺ phosphors for white light‐emitting diode

et al. 2017

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“…At a suitable yellow‐to‐blue intensity ratio, Dy 3+ will emit white light. However, the luminescence of Dy 3+ in single‐doped host has low emission intensity resulting from f–f transitions, which are forbidden by the spin selection rule . The phenomenon of energy transfer, from one rare‐earth ion acting as a sensitizer to another acting as an activator, is well known to enhance the luminescence of rare‐earth ion‐doped phosphors .…”

Section: Introductionmentioning

confidence: 99%

The luminescence properties of Sr_{2–1.5x−1.5y}P₂O₇:xDy³⁺,yCe³⁺ phosphor for near‐UV‐based white LEDs synthesized by a chemical co‐precipitation method

Zhu

Wang

et al. 2017

Luminescence

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A series of Sr P O :Dy , Sr P O :Ce and Sr P O :Dy ,Ce phosphors was synthesized via the one-step calcination process for the precursors prepared by co-precipitation methods. The phases, morphology, quantum efficiency and photoluminescence properties of the obtained phosphors were characterized systematically. These results show that the near-spherical particles prepared through calcining the precursors by means of ammonium dibasic phosphate co-precipitation (method 3) have the smallest particle size and strongest emission intensity among the three methods in the paper. With Dy concentration increasing in Sr P O :Dy phosphors, the luminescence intensity first increases, reaches maximum, and then decreases. A similar trend was followed by Sr P O :Ce with Ce concentration increasing. A successful attempt was made to initiate the energy transfer mechanism from Ce to Dy in the host lattice and an overlap between the emission band of Ce and the excitation band of Dy indicated that the Ce → Dy energy transfer may indeed exist. It is clear that the photoluminescence intensity of Dy as well as the quantum efficiency of the phosphor can be enhanced markedly by co-doping Ce . Sr P O :Dy ,Ce has its (CIE) chromaticity coordinates in the bluish-white-light region, near the standard illuminant D . The CIE 1913 chromaticity coordinates of Sr P O :Dy phosphors fall in the white-light region, and are adjacent to the ideal white-light coordinates. In addition, the colour temperature and colour tone of Sr P O :Dy could be adjusted by changing the relative concentration of Dy . In short, Sr P O :Dy can be a promising single-phased white-light emitting phosphor for near-UV (NUV) w-LEDs.

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“…At a suitable yellow-to-blue intensity ratio, Dy 3+ will emit white light. However, the luminescence of Dy 3+ in single doped host has low emission intensity due to f-f transitions, which are forbidden by the spin selection rule [6][7][8][9][10][11]. Fortunately, this problem may be overcome by the energy transfer from the sensitization ions to Dy 3+ .…”

Section: Introductionmentioning

confidence: 99%

Enhancing the luminescent properites of Zn2P2O7: Ce3+, Dy3+ via efficient energy transfer

Wang

Jia

2015

Materials Research Bulletin

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Resonant energy transfer from Ce3+→Dy3+ and Mn2+ in NaZnSO4Cl chlorosulphate phosphor

Cited by 15 publications

References 22 publications

Luminescent properties of single‐phase Ba_{2‐x‐1.5y‐1.5z}P₂O₇:xEu²⁺,yCe³⁺, zTb³⁺ phosphors for white light‐emitting diode

Luminescent properties of single‐phase Ba_{2‐x‐1.5y‐1.5z}P₂O₇:xEu²⁺,yCe³⁺, zTb³⁺ phosphors for white light‐emitting diode

The luminescence properties of Sr_{2–1.5x−1.5y}P₂O₇:xDy³⁺,yCe³⁺ phosphor for near‐UV‐based white LEDs synthesized by a chemical co‐precipitation method

Enhancing the luminescent properites of Zn2P2O7: Ce3+, Dy3+ via efficient energy transfer

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Resonant energy transfer from Ce3+→Dy3+ and Mn2+ in NaZnSO4Cl chlorosulphate phosphor

Cited by 15 publications

References 22 publications

Luminescent properties of single‐phase Ba2‐x‐1.5y‐1.5zP2O7:xEu2+,yCe3+, zTb3+ phosphors for white light‐emitting diode

Luminescent properties of single‐phase Ba2‐x‐1.5y‐1.5zP2O7:xEu2+,yCe3+, zTb3+ phosphors for white light‐emitting diode

The luminescence properties of Sr2–1.5x−1.5yP2O7:xDy3+,yCe3+ phosphor for near‐UV‐based white LEDs synthesized by a chemical co‐precipitation method

Enhancing the luminescent properites of Zn2P2O7: Ce3+, Dy3+ via efficient energy transfer

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Luminescent properties of single‐phase Ba_{2‐x‐1.5y‐1.5z}P₂O₇:xEu²⁺,yCe³⁺, zTb³⁺ phosphors for white light‐emitting diode

Luminescent properties of single‐phase Ba_{2‐x‐1.5y‐1.5z}P₂O₇:xEu²⁺,yCe³⁺, zTb³⁺ phosphors for white light‐emitting diode

The luminescence properties of Sr_{2–1.5x−1.5y}P₂O₇:xDy³⁺,yCe³⁺ phosphor for near‐UV‐based white LEDs synthesized by a chemical co‐precipitation method