Intense visible fluorescence and energy transfer in Dy3+, Tb3+, Sm3+ and Eu3+ doped rare-earth borate glasses

Lin, Hai; Pun, Edwin Yue-Bun; Wang, Xiaojun; Liu, Xingren

doi:10.1016/j.jallcom.2004.07.068

Cited by 128 publications

(46 citation statements)

References 20 publications

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“…Figure 5 gives the energy level diagram of Eu 3+ and Tb 3+ ions. It shows that [18,19] the 5 D 0 and 5 D 1 energy level of Eu 3+ ion is lower than 5 D 4 of Tb 3+ . When the two-doped ions all exist, there is an electrostatic effect between Eu 3+ and Tb 3+ under ultraviolet excitation.…”

Section: The Luminescence Properties Of Tb 3+ Doped Sio 2 Matrixmentioning

confidence: 89%

Novel trichromatic phosphor Co-doped with Eu, Tb in SiO2 gel matrix

Fan

et al. 2007

CHINESE SCI BULL

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The Eu, Tb co-doped SiO 2 matrix tricolor fluorescence system was prepared by sol-gel technique. Red emission at 618 nm, green emission at 543 nm and blue emission at 350-500 nm were observed in the PL spectra of the sample, indicating that Eu 3+ , Eu 2+ and Tb 3+ ions coexisted in the matrix. In the co-doped sample, the blue emission of Eu 2+ was much stronger than that of the sample single doped with Eu, which implied that the electron transfer between Eu 3+ and Tb 3+ maybe happened in the SiO 2 matrix. The influences of the annealing temperature and Tb concentration on the PL spectra of the samples were investigated. The optimal doped concentration of Tb was determined to be 0.2% and the optimal annealing temperature 850℃. Annealed at 600 • C, Tb 3+ had a sensitizing effect on Eu 3+ in the SiO 2 matrix, and the emission intensity of Eu 3+ in the Eu, Tb co-doped sample was more than four times that of the single doped sample, which could be attributed to the energy transfer from Tb 3+ to Eu 3+ .tricolor, photoluminescence, sol-gel method, rare earths, electron transfer, energy transfer By the end of the 20 th century, the study on rare earth doped luminescence materials had made great advances; and the theoretical value of quantum efficiency of two-photon luminescence had reached nearly 200% [1] . In recent years, as the single-colored luminescence materials have been well studied, the research is no longer confined to the single-colored case. By doping the rare earth ions, the materials can be activated and emit red, green and blue light simultaneously. The relative intensity of these three colors can be adjusted by changing the preparing conditions to produce a full-colored emission and this is one of the most important and attractive research projects in this area around the world now [2][3][4] .It is well known that the most common valence state of rare-earth ions is the trivalent one. Some ions are inclined to exist in abnormal valence, such as Sm 2+ , Eu 2+ , Yb 2+ and Ce 4+ , Pr 4+ , Tb 4+ . What interested us is that when these trivalent ions are doped in a matrix, they may tend to exchange an electron to get a more stable configuration. However, only in a few cases [5][6][7] , the phenomenon of electron transfer has been reported. According to the electron transfer theory, as the electronic configuration of Eu 3+ and Tb 3+ is conjugate, when they are co-doped in one matrix, the electron transition between Eu 3+ and Tb 3+ would occur and the Eu 2+ ions would be obtained. Thus, Eu 3+ , Eu 2+ and Tb 3+ would exist as activation ions in the same selected suitable matrix, which is an efficient way to obtain a single-matrix co-doped tricolor fluorescence system. So far, there is no report about the electron transfer between Tb 3+ and Eu 3+ in SiO 2 matrix.

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Section: The Luminescence Properties Of Tb 3+ Doped Sio 2 Matrixmentioning

confidence: 89%

Novel trichromatic phosphor Co-doped with Eu, Tb in SiO2 gel matrix

Fan

et al. 2007

CHINESE SCI BULL

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“…'de görülmektedir. Uyarma spektrumunda 260 nm'de gözlenen yayvan absorpsiyon bandı O 2− →Dy 3+ ve O 2− →Sm 3+ iyonları arasında ki yük transfer geçişlerini (LMCT) göstermektedir [7,8,12]. 366 nm, 410 nm ve 475 nm'deki uyarma banları Sm 3+ iyonunun 6 H5/2→ 4 D3/2, 6 H5/2→ 6 P3/2, 6 H5/2→ 4 I11/2 elektronik geçişlerinden kaynaklanmaktadır [13].…”

Section: Materyal Ve Metotunclassified

Zr0.98Dy0.01Sm0.01O2 Işıldarının Sentezi, Karakterizasyonu ve Fotolüminesans Özelliklerinin İncelenmesi

Yıldız¹

2018

SDÜ Fen Bil Enst Der

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Özet: Bu çalışmada Pechini yöntemi kullanılarak nano-parçacık boyutlarında Zr0.99Dy0.01O2 ve Zr0.98Dy0.01Sm0.01O2 seramik ışıldarlarının sentezi gerçekleştirildi. Işıldarların kristal yapısı X-ışınları toz kırınım difraktometresiyle (XRD) belirlendi. Termal özelliklerin incelenmesinde ise termogravimetri-diferansiyel termal analiz (TG/DTA) sistemi kullanıldı. Taramalı Elektron Mikroskobu (SEM) ile toz ışıldarların yüzey analizleri yapılarak tanecik boyutları analiz edildi. Fotoluminesans özellikleri ve ışıma süreleri fotoluminesans spektrofotometresi (PL) ile incelendi. Zr0.98Dy0.01Sm0.01O2 sisteminin ışıma spektrumunda 565 nm, 620 nm, 653 nm ve 720 nm'de gözlenen ışıma bandlarının Sm 3+ iyonunun 4 G5/2→ 6 H5/2, 4 G5/2→ 6 H7/2, 4 G5/2→ 6 H9/2 ve 4 G5/2→ 6 H11/2 karakteristik elektronik geçişlerine ait olduğu belirlendi. 495 nm gözlenen ışıma bandının ise Dy 3+ iyonunun 4 F9/2→ 6 H15/2 elektronik geçişine karşılık geldiği tespit edildi. Zr0.99Dy0.01O2 sistemine Sm 3+ iyonunun katkılanmasının ışıma süresini arttırdığı belirlendi. Abstract: In this work, nano particle size of Zr0.99Dy0.01O2 ve Zr0.98Dy0.01Sm0.01O2 phosphors were synthesized. The crystal structure of phosphors was characterized by X-ray powder diffractions (XRD). Thermogravimetry-differential thermal analysis (TG/DTA) system was used to determine thermal properties. Surface analyses of phosphors were analyzed using scanning electron microscope (SEM). Photoluminescence properties and decay times were investigated by photoluminescence spectrophotometer (PL). Luminescence bands observed at 565, 620, 653, 720 nm in the emission spectrum of Zr0.98Dy0.01Sm0.01O2. These bands are attributed to 4 G5/2→ 6 H5/2, 4 G5/2→ 6 H7/2, 4 G5/2→ 6 H9/2 ve 4 G5/2→ 6 H11/2 transitions of Sm 3+ ions. The peak at 495 nm attributed to 4 F9/2→ 6 H15/2 transition of Dy 3+ ions. It was determined that the decay time increased with the addition of Sm 3+ ion to the Zr0.99Dy0.01O2 system. Synthesis, Characterization and Investigation of GirişElektron veya ışın demeti malzemenin üzerine geldiğinde, enerjinin bir kısmı soğurulabilir ve bu soğurulan enerji ışık olarak yayınlanır. Bu işlem fotolüminesans (fotonla ışıma) olarak bilinir. Bu koşullarda ışık yayınlayan malzemeye ışıldar veya fosfor adı verilir [1].Konut kristal olarak adlandırılan katkı yapılmamış bileşiklerin ışıma sürelerini arttırmak için, kristalin katı içerisine yasak enerji aralığında ek enerji seviyeleri oluşmasını sağlayan aktivatör olarak bilinen çok düşük derişimde katkı iyonları eklenir.Etkili bir ışıma elde etmek için de bu iyonların örgü içerisinde homojen şekilde dağılması sağlanır. Yüksek derişimlerde katkılanan aktivatör iyonları sönümleyici etki gösterip ya ışıma şiddetini düşürür ya da ışıma olayının gözlenmemesine sebep olabilir. Bu nedenle ışıma özellikleri, katkı iyonunun cinsi ve katkı oranı, konut kristalin kimyasal bileşimi, sıcaklık, kristallenme sürecinin niteliği ve süresi gibi önemli parametrelere bağlı olarak değişir. Uzun süreli ışıldarların elde edilebilmesi için aktivatörün yanında

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“…Glasses doped with various rare-earth ions are important materials for fluorescent display devices, optical detectors, optical fibers, bulk lasers and optical amplifiers [1,2] . There has been an ever growing demand for optical fiber communication capacity and system integration, driven mainly by the rapid growth of the Internet.…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of 1.47-μm Emission in Tm3+-doped Li2O-SrO-ZnO-Bi2O3 Glasses

Lin¹,

Zhang²,

Chen³

et al. 2015

Proceedings of the International Conference on Chemical, Material and Food Engineering

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Abstract. Tm 3+ -doped Li 2 O-SrO-ZnO-Bi 2 O 3 (LSZB) glasses that are suitable for optical amplifier applications have been fabricated through the conventional melt-quenching method, and the spectroscopic properties of Tm 3+ in the glasses were characterized. The density, the refractive indices, the optical absorption, the Judd-Ofelt parameters Ω t , and the spontaneous transition probabilities of the glasses were measured and calculated. Using the least-squares fitting method, the Judd-Ofelt intensity parameters Ω t were found to be  2 =4.2910 -20 cm 2 ,  4 =1.1610 -20 cm 2 , and  6 =0.8410 -20 cm 2 . Intense 1.47-m fluorescence was observed in these glass systems under 785-nm excitation. The emission peak from the Tm 3+ : 3 H 4  3 F 4 transition locates around 1.47-µm with a bandwidth is ~112 nm, which is significantly wider than the bandwidth of Tm 3+ -doped ZBLAN at 80nm but smaller than that in KBG glasses. The results indicate that Tm 3+ -doped LSZB glasses is a promising host material for applications in optical amplifiers.

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Intense visible fluorescence and energy transfer in Dy3+, Tb3+, Sm3+ and Eu3+ doped rare-earth borate glasses

Cited by 128 publications

References 20 publications

Novel trichromatic phosphor Co-doped with Eu, Tb in SiO2 gel matrix

Novel trichromatic phosphor Co-doped with Eu, Tb in SiO2 gel matrix

Zr<sub>0.98</sub>Dy<sub>0.01</sub>Sm<sub>0.01</sub>O<sub>2</sub> Işıldarının Sentezi, Karakterizasyonu ve Fotolüminesans Özelliklerinin İncelenmesi

Optical Properties of 1.47-μm Emission in Tm3+-doped Li2O-SrO-ZnO-Bi2O3 Glasses

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