Concentration-dependent luminescence and energy transfer in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0034.gif" overflow="scroll"><mml:mrow><mml:msup><mml:mrow><mml:mi>Tb</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mo>/</mml:mo><mml:msup><mml:mrow><mml:mi>Eu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>doped borate and fluorozirconate glasses

Loos, Sebastian; Mungra, Mreedula; Ahrens, B.; Leonard, Robert L.; Evans, Adam Wesley; Johnson, Jacqueline A.; Steudel, Franziska; Schweizer, Stefan

doi:10.1016/j.jlumin.2017.03.030

Cited by 25 publications

(2 citation statements)

References 30 publications

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“…Lakshminarayana et al 47 reported Tm 3+ /Dy 3+ co-doped oxyfluoride germinate glasses for white light emission. Loos et al 48 reported a GPP emitting various colors from different energy transfers between Tb 3+ and Eu 3+ ions. The energy transfer from Tb 3+ to Eu 3+ was translated into the position of the chromaticity coordinates moving further into the orange/red region under 376 nm and 485 nm excitation as shown in the Fig.…”

Section: Glass Phosphor Plate (Gpp)mentioning

confidence: 99%

Review—Phosphor Plates for High-Power LED Applications: Challenges and Opportunities toward Perfect Lighting

Kim

Viswanath

Unithrattil

et al. 2017

ECS J. Solid State Sci. Technol.

128

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In the past decades, solid-state lighting based on phosphors as energy converters has been a fast-growing industry. Phosphorconverted white light-emitting diodes (pc-wLEDs) enable high-power applications and miniaturization; for this, the phosphor must have good stability and high efficiency. In order to satisfy this demand, phosphor plates have been proposed instead of conventional organic-based phosphor binders. In this review, such phosphor plates are categorized according to their synthesis methods, and the advantages and disadvantages of each category are detailed. In addition, we describe the major aspects of phosphor plates that require improvement for applications in high-power devices. For the fabrication of high-power LEDs, the phosphor configuration, color purity, porosity, and particle size of glass powders are key properties to enhance the luminescence efficiency and reduce the generation of heat inside wLED packages, thereby improving thermal stability. The advent of authentic, energy-efficient lighting in the home and workplace significantly affected the modern way of life. Beginning with the mass production of incandescent light bulbs, and with the subsequent evolution of fluorescence lights, lighting technology has developed rapidly in the last few decades. Since Edison's incandescent bulb in 1879, 1 artificial lighting has been developed to increase power output and decrease the size of the system. The development of red light-emitting diodes (LEDs) in 1962 2 and blue LEDs in 1993 3 allowed innovation in lighting and display. In particular, combinations of blue LEDs and yellow phosphors are used for many applications because they can realize cheap and efficient white solid-state lighting with several advantages including long lifetimes, eco-friendly behavior, and the capacity of miniaturization. 4-6In phosphor-converted white LEDs (pc-wLEDs), the phosphor converter dispersed in silicon resin (phosphor-in-silicon; PiS) is directly packed on a blue InGaN chip.7 When driven by a bias current, the emitted blue light absorbed by the phosphor is emitted as yellow light; together with the transmitted blue light, this constitutes white luminescence. However, this method lacks a red component, which entails the drawbacks of a poor color rendering index (CRI) and limited correlated color temperature (CCT). To overcome these drawbacks, one proposed method mixes yellow phosphors with phosphors having green to red emissions under blue excitation. 8 In pc-wLEDs, the color is primarily determined by the ratio of the blue emission from the LED chip to the yellow to red emission from the phosphor. However, the efficacy and brightness are determined by the converted yellow to red emission, as it contributes the bulk of lumens. In this configuration, the heat generated from the LED chip and phosphor cannot be efficiently dissipated because of the poor thermal stability and weak thermal conductivity of the resin, which causes luminous decay and color shifting in white light-emitting diodes (wLEDs).9 When the tempe...

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Section: Glass Phosphor Plate (Gpp)mentioning

confidence: 99%

Review—Phosphor Plates for High-Power LED Applications: Challenges and Opportunities toward Perfect Lighting

Kim

Viswanath

Unithrattil

et al. 2017

ECS J. Solid State Sci. Technol.

128

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“…NT iyonları içinde, Tb +3 , 5 D 4 → 7 F 5 geçişinden kaynaklanan yeşil yayınlanması (yaklaşık 540 nm) nedeni ile ilgi çekmektedir. Tb +3 iyonunun optik ve lüminesans özellikleri silikat (Sun et al, 2010;Zu et al, 2011), borat (Loos et al, 2017), bizmutborat (Chen et al, 2017), silikoborat (Kesavulu et al, 2017) ve borogermanat (Sun et al, 2013a;Sun et al, 2015a;Sun et al, 2015b;Struebing et al, 2016) gibi cam sistemlerinde çalışılmıştır. Bununla birlikte Gd +3 iyonunun yapıya katılması i) Gd +3 iyonundan aktivatör iyonuna enerji transferinin gerçekleşmesi, ii) yayınlanma ışık veriminin artması, iii) cam yoğunluğunun artması gibi dikkate değer yararlar sağlamaktadır (Tang et al, 2015;Onderisinova et al, 2015;Gökçe et al, 2017).…”

Section: Introductionunclassified

Investigation of Luminescence Properties of Tb3+ Ions In Gadolinium Borogermanate Glasses For Green Laser Application

Gökçe¹

2018

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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30B 2 O 3 -40GeO 2 -(30-x)Gd 2 O 3 -xTb 2 O 3 (x=1,2,3,5 ve 7 % mol) kompozisyonuna sahip cam sistemleri eritme tavlama yöntemi ile sentezlenmiştir. Hazırlanan camların optik ve lüminesans özellikleri soğurma, fotolüminesans ve bozunma zamanı ölçümleri ile incelenmiştir. Tb +3 katkılı borogermanat camlarının 378 nm uyarma altında elde edilen fotolüminesans spektrumları yeşil bölgede şiddetli yayınlanma ( 5 D 4 → 7 F J , J = 3,4,5 ve 6) ve mavi bölgede zayıf yayınlanma ( 5 D 3 → 7 F J , J = 3,4 ve 5) piklerinden oluşmaktadır. Bunların arasında en şiddetli 5 D 4 → 7 F 5 (541 nm) geçişi yeşil yayınlanma göstermektedir. x=5 katkı miktarından sonra konsantrasyon baskılanması gözlenmiştir. 5 D 4 → 7 F 5 ve 5 D 3 → 7 F 4 yayınlanma piklerinin alanlarının oranı olan yeşil-mavi değerleri (G/B) Tb +3 iyon konsantrasyonunun fonksiyonu olarak elde edilmiştir. Tb +3 iyonunun 5 D 4 → 7 F 5 geçişinin bozunma zamanı 1.801 ms olarak bulunmuştur. Hazırlanan camların elde edilen renk koordinatları CIE diyagramının yeşil bölgesinde yer almaktadır.

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Multicolor green to orange-red emission of Tb3+ and Eu3+-codoped tellurite glasses: Eu3+ concentration and Tb3+ → Eu3+ energy transfer

Álvarez

Alvarado-Rivera²,

Félix-Domínguez³

et al. 2022

Appl. Phys. A

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Concentration-dependent luminescence and energy transfer inTb3+/Eu3+doped borate and fluorozirconate glasses

Cited by 25 publications

References 30 publications

Review—Phosphor Plates for High-Power LED Applications: Challenges and Opportunities toward Perfect Lighting

Review—Phosphor Plates for High-Power LED Applications: Challenges and Opportunities toward Perfect Lighting

Investigation of Luminescence Properties of Tb3+ Ions In Gadolinium Borogermanate Glasses For Green Laser Application

Multicolor green to orange-red emission of Tb3+ and Eu3+-codoped tellurite glasses: Eu3+ concentration and Tb3+ → Eu3+ energy transfer

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