Dependence of luminescence properties on composition of rare-earth activated (oxy)nitrides phosphors for white-LEDs applications

He, Xiwen; Lian, Ning; Sun, Jiang; Guan, Mingyun

doi:10.1007/s10853-009-3668-4

Cited by 93 publications

(66 citation statements)

References 95 publications

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“…Indeed, from the six requirements put forward in this Review, it is clear that the broad-band emitting rare earth ions Eu 2+ and Ce 3+ show nearly ideal properties; the remaining task is to find suitable hosts in which the red-shift of the emission is large enough. This Detailed overviews of the structure and luminescence of europium, cerium and manganese doped (oxy)nitride materials can be found in the Reviews by Ye et al [128], Xie et al [55,147] and He et al [148].…”

Section: Oxynitrides and Nitridesmentioning

confidence: 99%

Selecting Conversion Phosphors for White Light-Emitting Diodes

Smet

Parmentier

Poelman

2011

J. Electrochem. Soc.

695

501

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Light emitting diodes (LEDs) are on the verge of a breakthrough in general lighting, due to their rapidly improving efficiency. Currently, white LEDs with high color rendering are mainly based on wavelength conversion by one or more phosphor materials. This Review first describes how to quantify the quality of a light source, discussing the color rendering index (CRI) and alternative color quality indices. Then, six main criteria are identified and discussed, which should be fulfilled by a phosphor candidate to be considered for actual application in LEDs. These criteria deal with the shape and position of the emission and the excitation spectra, the thermal quenching behavior, the quantum efficiency, the chemical and thermal stability and finally with the occurrence of saturation effects. Based on these criteria, the most common dopant ions (broad-band emitting Eu AbstractLight emitting diodes (LEDs) are on the verge of a breakthrough in general lighting, due to their rapidly improving efficiency. Currently, white LEDs with high color rendering are mainly based on wavelength conversion by one or more phosphor materials. This Review first describes how to quantify the quality of a light source, discussing the color rendering index (CRI) and alternative color quality indices. Then, six main criteria are identified and discussed, which should be fulfilled by a phosphor candidate to be considered for actual application in LEDs. These criteria deal with the shape and position of the emission and the excitation spectra, the thermal quenching behavior, the quantum efficiency, the chemical and thermal stability and finally with the occurrence of saturation effects. Based on these criteria, the most common dopant ions (broad-band emitting Eu

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Section: Oxynitrides and Nitridesmentioning

confidence: 99%

Selecting Conversion Phosphors for White Light-Emitting Diodes

Smet

Parmentier

Poelman

2011

J. Electrochem. Soc.

695

501

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“…[89] Today, there are several rare earth-doped (oxo)nitridosilicate compounds that exhibit interesting luminescence properties. This review will give a brief overview on some of the most promising phosphors; more extensive reviews on luminescence of (oxo)nitridosilicates have recently been published by Hçppe, [188] Xie, [94] Setlur, [189] He, [190] and others. In 1997, Huppertz was the first to report the deep-red luminescence of Eu 2 Si 5 N 8 upon excitation with UV light (Figure 27).…”

Section: +mentioning

confidence: 99%

Nitridosilicates and Oxonitridosilicates: From Ceramic Materials to Structural and Functional Diversity

2011

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Silicates are one of the most important classes of compounds on this planet, and more than 1000 silicates have been identified in the mineral kingdom. Additionally, several hundreds of artificial silicates have been synthesized. The substitution of oxygen by nitrogen leads to the structurally diverse and manifold class of nitridosilicates. Silicon nitride, one of the most important non-oxidic ceramic materials, is the binary parent compound of nitridosilicates, and it symbolizes the inherent material properties of these refractory compounds. However, prior to the last decades, a broad systematic investigation of nitridosilicates had not been accomplished. In the meantime, these and related compounds have reached a remarkable level of industrial application. This review illustrates recent progress in synthesis and structure-property relationships and also applications of nitridosilicates, oxonitridosilicates, and related SiAlONs.

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“…[25] Thereby, the first warm white all-nitride pc-LED has been realized, exhibiting unprecedented color quality and stability with temperature and drive. [12] Another important red phosphor is the nitridoaluminosilicate CaAlSiN 3 :Eu 2 + [26,27] and its derivatives. As the quest for higher energy efficiency represents one of the most fundamental and exigent challenges to be solved by modern science and technology, it becomes apparent that the search for novel and ecologically acceptable energy sources is indispensable.…”

Section: A C H T U N G T R E N N U N G Odes (Pc-leds)mentioning

confidence: 99%

Material Properties and Structural Characterization of M₃Si₆O₁₂N₂:Eu²⁺ (M=Ba, Sr)—A Comprehensive Study on a Promising Green Phosphor for pc‐LEDs

Braun¹,

Seibald²,

Börger³

et al. 2010

Chemistry A European J

107

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The efficient green phosphor Ba(3)Si(6)O(12)N(2):Eu(2+) and its solid-solution series Ba(3-x)Sr(x)Si(6)O(12)N(2) (with x approximately = 0.4 and 1) were synthesized in a radio-frequency furnace under nitrogen atmosphere at temperatures up to 1425 degrees C. The crystal structure (Ba(3)Si(6)O(12)N(2), space group P3 (no. 147), a = 7.5218(1), c = 6.4684(1) A, wR2 = 0.048, Z = 1) has been solved and refined on the basis of both single-crystal and powder X-ray diffraction data. Ba(3)Si(6)O(12)N(2):Eu(2+) is a layer-like oxonitridosilicate and consists of vertex-sharing SiO(3)N-tetrahedra forming 6er- and 4er-rings as fundamental building units (FBU). The nitrogen atoms are connected to three silicon atoms (N3), while the oxygen atoms are either terminally bound (O1) or bridge two silicon atoms (O2) (numbers in superscripted square brackets after atoms indicate the coordination number of the atom in question). Two crystallographically independent Ba(2+) sites are situated between the silicate layers. Luminescence investigations have shown that Ba(3)Si(6)O(12)N(2):Eu(2+) exhibits excellent luminescence properties (emission maximum at approximately 527 nm, full width at half maximum (FWHM) of approximately 65 nm, low thermal quenching), which provides potential for industrial application in phosphor-converted light-emitting diodes (pc-LEDs). In-situ high-pressure and high-temperature investigations with synchrotron X-ray diffraction indicate decomposition of Ba(3)Si(6)O(12)N(2) under these conditions. The band gap of Ba(3)Si(6)O(12)N(2):Eu(2+) was measured to be 7.05+/-0.25 eV by means of X-ray emission spectroscopy (XES) and X-ray absorption near edge spectroscopy (XANES). This agrees well with calculated band gap of 6.93 eV using the mBJ-GGA potential. Bonding to the Ba atoms is highly ionic with only the 4p(3/2) orbitals participating in covalent bonds. The valence band consists primarily of N and O p states and the conduction band contains primarily Ba d and f states with a small contribution from the N and O p states.

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Dependence of luminescence properties on composition of rare-earth activated (oxy)nitrides phosphors for white-LEDs applications

Cited by 93 publications

References 95 publications

Selecting Conversion Phosphors for White Light-Emitting Diodes

Selecting Conversion Phosphors for White Light-Emitting Diodes

Nitridosilicates and Oxonitridosilicates: From Ceramic Materials to Structural and Functional Diversity

Material Properties and Structural Characterization of M₃Si₆O₁₂N₂:Eu²⁺ (M=Ba, Sr)—A Comprehensive Study on a Promising Green Phosphor for pc‐LEDs

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Dependence of luminescence properties on composition of rare-earth activated (oxy)nitrides phosphors for white-LEDs applications

Cited by 93 publications

References 95 publications

Selecting Conversion Phosphors for White Light-Emitting Diodes

Selecting Conversion Phosphors for White Light-Emitting Diodes

Nitridosilicates and Oxonitridosilicates: From Ceramic Materials to Structural and Functional Diversity

Material Properties and Structural Characterization of M3Si6O12N2:Eu2+ (M=Ba, Sr)—A Comprehensive Study on a Promising Green Phosphor for pc‐LEDs

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Material Properties and Structural Characterization of M₃Si₆O₁₂N₂:Eu²⁺ (M=Ba, Sr)—A Comprehensive Study on a Promising Green Phosphor for pc‐LEDs