Red emission in B3+- and Li+-doped SrAl2O4:Eu3+ phosphor under UV excitation

Qiang, R.F.; Xiao, Siguo; Ding, Jian; Yuan, Wei; Zhu, Chen

doi:10.1016/j.jlumin.2009.03.004

Cited by 38 publications

(8 citation statements)

References 22 publications

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“…The red emission of SrAl 2 O 4 :Eu 3+ could not be utilized for LEDs at all, because the linear spectra of the [23]. The substitution of Sr 2+ by Eu 3+ will form a positive charger defect, and Li + was used to compensate the defect [23]. Consequently, further enhancement of red luminescence was observed in reference [23] after doping Li + , which was consistent with this work.…”

Section: Resultssupporting

confidence: 86%

“…In reference [23], red emission from Eu 3+ was obtained in the same host of SrAl 2 O 4 as this work, but green emission from Eu 2+ was obtained here. The red emission of SrAl 2 O 4 :Eu 3+ could not be utilized for LEDs at all, because the linear spectra of the [23].…”

Section: Resultssupporting

confidence: 51%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

A new green phosphor of SrAl2O4:Eu2+,Ce3+,Li+ for alternating current driven light-emitting diodes

Chen

Zhang

Liu

et al. 2012

Materials Research Bulletin

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Section: Resultssupporting

confidence: 86%

Section: Resultssupporting

confidence: 51%

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A new green phosphor of SrAl2O4:Eu2+,Ce3+,Li+ for alternating current driven light-emitting diodes

Chen

Zhang

Liu

et al. 2012

Materials Research Bulletin

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“…The charge imbalance and lattice distort could induce point defects in the structure, which would increase the nonradiative process that resulted in the reduction of emission intensity [26,27]. For Sr 2 P 2 O 7 : Sm 3þ , the Sm 3þ ions entered the host crystal lattice and preferentially substituted for Sr 2þ ions, which induced the charge imbalance.…”

Section: Luminescence Propertiesmentioning

confidence: 99%

Photoluminescence characteristics of Sm3+ doped Sr2P2O7 as new orange-red emitting phosphor

Zhou

Wang

et al. 2015

Journal of Alloys and Compounds

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“…Qiang et al published a paper to show the effect of boron ion on the optical properties of Sr 2 AlO 4 :Eu 3+ . According to this study, the emission intensity of the sample with suitable B 3+ content is signifi cantly enhanced [23]. Yao and Donghua investigated the effect of B 3+ ion on the PL properties of Li 2 (Ba 0.99 , Eu 0.01 )SiO 4 [24].…”

mentioning

confidence: 97%

Enhanced Emission from Li2CaSiO4:Dy3+ Phosphors by Doping with Al3+ and B3+

Erdoğmuş

2016

J Appl Spectrosc

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Pure Li 2 CaSiO 4 , Li 2 CaSiO 4 :Dy 3+ and Al 3+ , B 3+ co-doped materials were prepared by a solid-state reaction in air at 900 o C for 6 h and characterized by using powder XRD. The luminescence properties of the synthesized phosphors were measured at room temperature with a spectrofl uorometer. Li 2 CaSiO 4 :Dy 3+ emits at 484, 575, and 660 nm upon 352 nm excitation. The emission spectrum intensity of Dy 3+ increased from 0.01 to 0.06 mol.%, and beyond 0.06 mol.%, concentration quenching was observed. Also, in this study, the effects of boric acid and aluminum oxide concentration on the photoluminescence properties of Dy 3+ doped phosphors were investigated. The results showed that boric acid and aluminum oxide were effective in improving the photoluminescence intensity of Li 2 CaSiO 4 :Dy 3+ compounds.Keywords: luminescence, X-ray diffraction, inorganic borate, aluminum oxide, boric acide.Introduction. Complex oxides involving silicates, aluminates, and borates have strong absorption in the VUV range, and for this reason they have been studied as host materials [1]. In particular, trivalent rare earth ion-doped borates have been widely studied for their applications as phosphors [2]. They are composed of an inert host lattice and an optically excited activator, typically a 3d or 4f electron metal. For applications in new full color fl at panel display industry, thermally stable, high luminous effi ciency, radiation resistant, fi ne particle size powders are required [3,4].Also inorganic phosphors containing rare earths have attracted great attention because of their extensive applications in fi elds such as information display, advanced laser materials and fi ber optical communication [5,6]. It is known that the luminescent properties of phosphors usually depend on the interactions with the environment around the activators in the host lattice [7]. The light-conversion phosphors for solid state lighting have attracted much attention in recent years [8]. Thus, authors and researchers have shown an increased interest in trivalent lanthanide (Ln 3+ )-doped luminescent materials because of their unique optical properties arising due to 4f transitions, which gives strong and sharp emissions [9]. Numerous papers have been published on luminescence properties of rare-earth phosphors [10-13].The orthosilicate matrix phosphors can be excited by UV and blue light, since these phosphors involve broad excitation bands. Dy 3+ rare-earth ions have a variety of optical energy level structures [14][15][16][17][18][19]. Therefore, the luminescence properties of Dy 3+ -doped inorganic crystal and glasses have been widely investigated.The aim of this work was to enhance the emission intensity of the Dy 3+ -doped Li 2 CaSiO 4 phosphor through doping H 3 BO 3 and Al 2 O 3 into the Ca 2+ site in the lattice. Recently, numerous researches reported the effect of co-doped Al 3+ and B 3+ cations on the luminescence properties of inorganic phosphors. For example, Silversimith et al., investigated the role of Al 3+ co-doping in improv...

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Red emission in B3+- and Li+-doped SrAl2O4:Eu3+ phosphor under UV excitation

Cited by 38 publications

References 22 publications

A new green phosphor of SrAl2O4:Eu2+,Ce3+,Li+ for alternating current driven light-emitting diodes

A new green phosphor of SrAl2O4:Eu2+,Ce3+,Li+ for alternating current driven light-emitting diodes

Photoluminescence characteristics of Sm3+ doped Sr2P2O7 as new orange-red emitting phosphor

Enhanced Emission from Li2CaSiO4:Dy3+ Phosphors by Doping with Al3+ and B3+

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