Energy transfer in oxidic phosphors

Blasse, G.

doi:10.1016/0375-9601(68)90486-6

Cited by 1,819 publications

(701 citation statements)

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“…To determine the dominant mechanism, the asymmetry ratio reveals information in the bonding nature between Eu 3+ ion and the surrounding anions. The asymmetric ratio was calculated by the ratio of the intensity of the electric dipole transition 5 Figure 11 illustrates the color perception related to luminescence of selective YAG:Eu and YAG:Eu,Si samples. Color perception can be stated in terms of the CIE coordinates given by the International Commission for Illumination mathematically.…”

Section: Spectroscopic Properties and Judd-ofelt Theorymentioning

confidence: 99%

“…And all entries have their usual meaning (e is the charge of electron,  is the energy of transition, h is Plank's constant, n is the refractive index, and J = 0 for the 5 …”

Section: Spectroscopic Properties and Judd-ofelt Theorymentioning

confidence: 99%

“…The concentration quenching will not occur beyond the critical distance. For this reason, it is possible to obtain the critical distance (R c ), which is the shortest distance between the nearest activator ions and can be calculated from the following formula [5]:…”

Section: +mentioning

confidence: 99%

“…When Y 3+ ions in YAG doped with trivalent rare earth ions, such as Gd, Eu, Pr, Ce, and Tb, it can be widely used in optoelectronic devices [2][3][4]. At present, commercial white LED is mainly manufactured by combining a GaN based blue LED chip with Y 3 Al 5 O 12 :Ce 3+  (YAG:Ce) yellow phosphor [5]. But the LED faces problems of color separation between blue and yellow and poor color rendering caused by the lack of a red component in the spectrum.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Y3Al5O12:Eu and Y3Al5O12:Eu,Si phosphors by combustion method: Comparative investigations on the structural and spectral properties

Upasani

2016

J Adv Ceram

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Section: Spectroscopic Properties and Judd-ofelt Theorymentioning

confidence: 99%

“…And all entries have their usual meaning (e is the charge of electron,  is the energy of transition, h is Plank's constant, n is the refractive index, and J = 0 for the 5 …”

Section: Spectroscopic Properties and Judd-ofelt Theorymentioning

confidence: 99%

Section: +mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of Y3Al5O12:Eu and Y3Al5O12:Eu,Si phosphors by combustion method: Comparative investigations on the structural and spectral properties

Upasani

2016

J Adv Ceram

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“…Наиболее близким по энергии к энергии возбуждения является метастабиль-ный уровень 4 F 3/2 Nd 3+ , с которого возможна передача части энергии гольмию по резонансно-индуктивному (мультипольному) механизму и переходу его из основ-ного состояния 5 [36], благоприятствует этому процессу: [40], которая сти-мулирует переход 2 F 7/2 → 2 F 5/2 с E ∼ 2200−2400 cm −1 (∼ 3hω ′ ), сопровождающийся испусканием трех фононов. Рассмотренные выше примеры указывают на генерацию фононов при диссипации возбужденного состояния ак-цептора.…”

Section: экспериментальные результаты и их обсуждениеunclassified

Новый люминофор ИК-диапазона на основе германата Sr-=SUB=-3-=/SUB=-La-=SUB=-2-=/SUB=-(Ge-=SUB=-3-=/SUB=-O-=SUB=-9-=/SUB=-)-=SUB=-2-=/SUB=- : Nd-=SUP=-3+-=/SUP=-, Ho-=SUP=-3+-=/SUP=-

Мелкозерова¹,

Бакланова²,

Липина³

et al. 2018

Физика Твердого Тела

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Cyclogermanate Sr_3La_2(Ge_3O_9)_2, isostructural to silicate Sr_3Er_2(Si_3O_9)_2, activated by neodymium and holmium is obtained for the first time by the precursor method. Ion Nd^3+ in the structure of Sr_3La_2(Ge_3O_9)_2 is a sensitizer of the infrared luminescence of Ho^3+. Excitation by radiation with a wavelength of 808 nm leads to a series of emission lines in the luminescence spectra of Sr_3La_2- x Nd_ x (Ge_3O_9)_2 : Ho^3+ in the short-wave and middle-IR ranges (1.0–3.4 μm). The highest intensity of lines at 2.1 and 2.7 μm, associated with the ^5 I _7 → ^5 I _8 and ^5 I _6 → ^5 I _7 transitions in the Ho^3+ ion, is found for compositions containing traces of holmium. Based on the analysis of the concentration dependences of the luminescence intensity, an optimal composition of the phosphor is determined, which ensures the maximum efficiency of conversion of laser radiation energy. The data obtained are interpreted in the assumption of cross-relaxation energy transfer from Nd^3+ to Ho^3+.

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Enhanced Stability and Brightness through Co‐Substitution: Promoting Plant Growth with Green‐Excited Deep Red Phosphor Ca_1‐zSr_zLi_1‐xMg_2xAl_3‐xN₄:yEu²⁺

Wang,

et al. 2024

Advanced Materials

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The research utilized a strategy of chemical unit co‐substitution, successfully developing a novel blue‐green to green excited, deep red‐emitting phosphor, Ca1‐zSrzLi1‐xMg2xAl3‐xN4:yEu2+ (CLA‐2xM‐zS:yEu, 0≤x≤0.8, 0.003≤y≤0.01, 0≤z≤1), through the replacement of [Li−Al]4+ by [Mg−Mg]4+. This phosphor uniquely converts unusable green light to growth‐enhancing deep red, optimizing it for outdoor agriculture. Doping with Sr creates traps, causing a redshift in emission peaks, as confirmed by 7Li nuclear magnetic resonance (NMR) spectra, indicating Li presence and lattice changes. Ca0.2Sr0.8Li0.5MgAl2.5N4:0.005Eu2+ (CLAM‐0.8S) phosphor maintained high luminescence intensity under extreme conditions of 85 °C/85% RH, demonstrating excellent photoluminescence performance and chemical stability, compared with conventional SrLi0.5MgAl2.5N4:0.005Eu2+ (SLMA) and SrLiAl3N4:0.005Eu2+(SLA). Experimental results surprised that the unique Ca0.2Sr0.8Li0.8Mg0.4Al2.8N4:0.005Eu2+ (CLA‐0.4M‐0.8S) prepared light‐converting film, which is mainly excited by green light, demonstrated a 20% increase in optical density of Chlorella compared to the PP film and a remarkable 97.5% increase compared to the control group without any film. These findings suggest that this film has significant potential for applications in outdoor agriculture and other fields.

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Energy transfer in oxidic phosphors

Cited by 1,819 publications

References 4 publications

Synthesis of Y3Al5O12:Eu and Y3Al5O12:Eu,Si phosphors by combustion method: Comparative investigations on the structural and spectral properties

Synthesis of Y3Al5O12:Eu and Y3Al5O12:Eu,Si phosphors by combustion method: Comparative investigations on the structural and spectral properties

Новый люминофор ИК-диапазона на основе германата Sr-=SUB=-3-=/SUB=-La-=SUB=-2-=/SUB=-(Ge-=SUB=-3-=/SUB=-O-=SUB=-9-=/SUB=-)-=SUB=-2-=/SUB=- : Nd-=SUP=-3+-=/SUP=-, Ho-=SUP=-3+-=/SUP=-

Enhanced Stability and Brightness through Co‐Substitution: Promoting Plant Growth with Green‐Excited Deep Red Phosphor Ca_1‐zSr_zLi_1‐xMg_2xAl_3‐xN₄:yEu²⁺

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Energy transfer in oxidic phosphors

Cited by 1,819 publications

References 4 publications

Synthesis of Y3Al5O12:Eu and Y3Al5O12:Eu,Si phosphors by combustion method: Comparative investigations on the structural and spectral properties

Synthesis of Y3Al5O12:Eu and Y3Al5O12:Eu,Si phosphors by combustion method: Comparative investigations on the structural and spectral properties

Новый люминофор ИК-диапазона на основе германата Sr-=SUB=-3-=/SUB=-La-=SUB=-2-=/SUB=-(Ge-=SUB=-3-=/SUB=-O-=SUB=-9-=/SUB=-)-=SUB=-2-=/SUB=- : Nd-=SUP=-3+-=/SUP=-, Ho-=SUP=-3+-=/SUP=-

Enhanced Stability and Brightness through Co‐Substitution: Promoting Plant Growth with Green‐Excited Deep Red Phosphor Ca1‐zSrzLi1‐xMg2xAl3‐xN4:yEu2+

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About

Enhanced Stability and Brightness through Co‐Substitution: Promoting Plant Growth with Green‐Excited Deep Red Phosphor Ca_1‐zSr_zLi_1‐xMg_2xAl_3‐xN₄:yEu²⁺