Resonant energy transfer in (Eu3+, Bi3+)-codoped CaZrO3red-emitting phosphor

Orihashi, Takuya; Nakamura, Toshihiro; Adachi, Sadao

doi:10.1039/c6ra13429g

Cited by 30 publications

(11 citation statements)

References 59 publications

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“…Figure a,b shows the comparison of the reflectance spectra and the typical luminescent features of the CaMO 3 :Bi 3+ systems (M = Zr, Sn, and Ti), respectively. The PL emissions display a clear red-shift trend of the emission band moving from CaZrO 3 to CaSnO 3 and CaTiO 3 , in agreement with the optical behavior reported in the literature. ,, The CaSnO 3 :Bi 3+ PLE spectrum is composed of two bands, with the maximum peaks at 258 and 307 nm. The peak at higher energy (4.79 eV) can be assigned to the host exciton absorption .…”

Section: Results and Discussionsupporting

confidence: 89%

Uncovering the Origin of the Emitting States in Bi³⁺-Activated CaMO₃ (M = Zr, Sn, Ti) Perovskites: Metal-To-Metal Charge Transfer Versus s–p Transitions

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Ueda

et al. 2019

J. Phys. Chem. C

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After more than a century of studies on the optical properties of Bi 3+ ions, the assignment of the nature of the emissions and the bands of the absorption spectra remain ambiguous. Here, we report an insight into the spectroscopy of Bi 3+ -activated CaMO 3 perovskites (M = Zr, Sn, and Ti), discussing the factors driving the metal-to-metal charge transfer and sp → s 2 transitions. With the aim to figure out the whole scenario, a combined experimental and theoretical approach is employed. The comparison between the temperature dependence of the photoluminescence emissions with the temperature dependence of the exciton energy of the systems has led to an unprecedented evidence of the chargetransfer character of the emitting states in Bi 3+ -activated phosphors. Low-temperature vacuum ultraviolet spectroscopy together with the design of the vacuum-referred binding energy diagram of the luminescent center is exploited to shed light on the origin of the absorption bands. In addition, the X-ray absorption near the edge structure unambiguously confirmed the stabilization of Bi 3+ in the Ca 2+ site in both CaSnO 3 and CaZrO 3 perovskites. This breakthrough into the understanding of the excited-state origin of Bi 3+ could pave the way toward the design of a new generation of effective Bi 3+ -activated phosphors.

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Section: Results and Discussionsupporting

confidence: 89%

Uncovering the Origin of the Emitting States in Bi³⁺-Activated CaMO₃ (M = Zr, Sn, Ti) Perovskites: Metal-To-Metal Charge Transfer Versus s–p Transitions

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Ueda

et al. 2019

J. Phys. Chem. C

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“…In addition, the electrons in the ground states of Eu 3+ are also excited to 5 D 0 excited energy level in response to n-UV light, then return back to the ground state with the characteristic red emission of Eu 3+ . Therefore, the energy transfer from Bi 3+ to Eu 3+ can achieve color adjustment from blue to red light and enhance the emission intensity of Eu 3+ . , …”

Section: Resultsmentioning

confidence: 81%

Giant Photoluminescence Improvement and Controllable Emission Adjustment in Bi³⁺-Activated Ca₄ZrGe₃O₁₂ Phosphors for High-Quality White Light-Emitting Diodes

Yan

Chen

Liu

et al. 2019

ACS Appl. Electron. Mater.

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High-performance and thermally stable phosphors play an important role in high-quality white light-emitting diode (pc-WLED) lighting. In this work, we proposed a cation substitution strategy to improve the luminescence performance of blue-emitting Bi3+-doped Ca4ZrGe3O12 (abbreviated as CZGO) phosphor. As expected, the introduction of Sr2+ and Si4+ can improve photoluminescence intensity and thermal stability. The photoluminescence intensity can be increased by 6.7 times. The internal quantum efficiency (IQE) can achieve 88.1%. Based on Rietveld refinement results, the corresponding enhancement mechanism is ascribed to the local lattice modification and the improved structure rigidity. In addition, controllable color tuning from blue to red light is successfully realized through designing Bi3+ → Eu3+ energy transfer. The energy transfer efficiency (ηT) is 0.55 in CZGO:2% Bi3+, 15% Eu3+ phosphor. The energy transfer mechanism is discussed in detail. The prototype pc-WLEDs with blue/red dual-emitting CZGO:2% Bi3+, 10% Eu3+ possess a high color rendering index (CRI = 90.8) and low correlated color temperature (CCT = 4372 K). The above investigations indicate that CZGO:Bi3+ and CZGO:Bi3+, Eu3+ are promising blue-to-red tunable phosphor candidates for pc-WLED applications.

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“…Simultaneously, the Bi 3+ ions in the 3 P 1 state can also transfer their energy to the adjacent Mn 4+ ions and promote the Mn 4+ ions from the 4 A 2g ground state to the 4 T 2g , 2 T 2g , and 4 T 1g energy levels and relax to the 2 E g level through a nonradiative transition and then produce red emission when they return to the 4 A 2g ground state. [113][114][115] The energy transfer occurring between Bi 3+ and Mn 4+ eventually lead to an enhancement in the far-red emission of Mn 4+ .…”

Section: Tunable Dual Emissions For Bi 3+ and Mn 4+ Codoped Phosphorsmentioning

confidence: 99%

A review on the structural dependent optical properties and energy transfer of Mn⁴⁺ and multiple ion-codoped complex oxide phosphors

et al. 2021

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Resonant energy transfer in (Eu³⁺, Bi³⁺)-codoped CaZrO₃red-emitting phosphor

Cited by 30 publications

References 59 publications

Uncovering the Origin of the Emitting States in Bi³⁺-Activated CaMO₃ (M = Zr, Sn, Ti) Perovskites: Metal-To-Metal Charge Transfer Versus s–p Transitions

Uncovering the Origin of the Emitting States in Bi³⁺-Activated CaMO₃ (M = Zr, Sn, Ti) Perovskites: Metal-To-Metal Charge Transfer Versus s–p Transitions

Giant Photoluminescence Improvement and Controllable Emission Adjustment in Bi³⁺-Activated Ca₄ZrGe₃O₁₂ Phosphors for High-Quality White Light-Emitting Diodes

A review on the structural dependent optical properties and energy transfer of Mn⁴⁺ and multiple ion-codoped complex oxide phosphors

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Resonant energy transfer in (Eu3+, Bi3+)-codoped CaZrO3red-emitting phosphor

Cited by 30 publications

References 59 publications

Uncovering the Origin of the Emitting States in Bi3+-Activated CaMO3 (M = Zr, Sn, Ti) Perovskites: Metal-To-Metal Charge Transfer Versus s–p Transitions

Uncovering the Origin of the Emitting States in Bi3+-Activated CaMO3 (M = Zr, Sn, Ti) Perovskites: Metal-To-Metal Charge Transfer Versus s–p Transitions

Giant Photoluminescence Improvement and Controllable Emission Adjustment in Bi3+-Activated Ca4ZrGe3O12 Phosphors for High-Quality White Light-Emitting Diodes

A review on the structural dependent optical properties and energy transfer of Mn4+ and multiple ion-codoped complex oxide phosphors

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Resonant energy transfer in (Eu³⁺, Bi³⁺)-codoped CaZrO₃red-emitting phosphor

Uncovering the Origin of the Emitting States in Bi³⁺-Activated CaMO₃ (M = Zr, Sn, Ti) Perovskites: Metal-To-Metal Charge Transfer Versus s–p Transitions

Uncovering the Origin of the Emitting States in Bi³⁺-Activated CaMO₃ (M = Zr, Sn, Ti) Perovskites: Metal-To-Metal Charge Transfer Versus s–p Transitions

Giant Photoluminescence Improvement and Controllable Emission Adjustment in Bi³⁺-Activated Ca₄ZrGe₃O₁₂ Phosphors for High-Quality White Light-Emitting Diodes

A review on the structural dependent optical properties and energy transfer of Mn⁴⁺ and multiple ion-codoped complex oxide phosphors