Thermochromic material Sr2SiO4:Eu2+ based on displacive transformation

Song, Zhitang; Ding, Xianlin; Yang, Shanshan; Du, Feifei; Bian, Liu; Duan, Shanghong; Liu, Q.L.

doi:10.1016/j.jlumin.2013.11.023

Cited by 14 publications

(8 citation statements)

References 16 publications

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“…Dutczak et al reported Sr 2 SiO 4 :Eu 2+ , Dy 3+ yellow persistent phosphor (8). Z Song studied the Sr 2 SiO 4 :Eu 2+ and used it as a thermochromics material (9). JH Lee prepared Sr 2-x Eu x SiO 4 by a flux method and studied its phase transition and luminescent properties (10).…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure and Luminescent Properties of Sr₂SiO₄:Eu²⁺ Phosphor Prepared by Sol-Gel Method

Pan

Zhang

et al. 2016

Journal of Applied Biomaterials & Functional Materials

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The energy gap of α'-SSO and β-SSO are 4.489 and 4.106 eV, respectively. While, two samples showed similar total and partial densities of states. Under the excitation by the ultra violet (UV) light (365 nm), the SSO:xEu2+ phosphor exhibited a green emission band from 400 to 700 nm, which was corresponding to the transition of 5d → 4f of Eu2+ ions. Two emission peaks at 464 and 532 nm could be obtained through Gauss fitting curves. The ratio of the blue to green emission peak decreased with the Eu2+ concentration and the peaks shifted regularly with it. The thermal quenching property was investigated and its activation energy was calculated. The results indicated that this phosphor could be a candidate of green phosphor for UV-based light-emitting diodes (LEDs).

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Section: Introductionmentioning

confidence: 99%

Crystal Structure and Luminescent Properties of Sr₂SiO₄:Eu²⁺ Phosphor Prepared by Sol-Gel Method

Pan

Zhang

et al. 2016

Journal of Applied Biomaterials & Functional Materials

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“…Currently, there are several long-afterglow rare-earth luminescent materials that can be used to prepare luminous fibers, such as Sr 2 ZnSi 2 O 7 : Eu 2+ , Dy 3+ (SZSO), Sr 2 AlO 3 : Eu 2+ , Dy 3+ (SAO), Y 2 O 2 S: Eu 3+ , Mg 2+ , and Ti 4+ (YOS). SZSO, SAO, and YOS present blue, green, and red luminescence emissions, respectively, with long afterglow time and highly efficient energy storage, and have emerged as prominent materials for the preparation of luminous fibers [1,2,3,4]. Luminous fibers prepared from SZSO, SAO, and YOS have diverse luminescence colors owing to the intercoordination of these three rare-earth luminescent materials [5].…”

Section: Introductionmentioning

confidence: 99%

A Heat-Stimulated Luminous Fiber Using Heat-Sensitive Green TF-G Pigment

Yang

2018

Materials

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In this study, we fabricated a heat-stimulated luminous fiber (HSLF) by wet spinning. The HSLF consists of Sr2ZnSi2O7: Eu2+, Dy3+ (SZSO), Y2O2S: Eu3+, Mg2+, Ti4+ (YOS), and heat-sensitive green TF-G pigment (HSGP). SZSO and YOS serve as a source of luminescence to yield a long afterglow system. HSGP is a heat-stimulating agent which develops the link between luminescence and temperature for HSLF. The luminescence of the HSLF is dull below 30 °C, but vivid above 30 °C. The luminescence of HSLFs can be stimulated by low heat (human body temperature). Emission spectra were recorded at 20 °C and 30 °C to investigate the heat-stimulated luminescent performance of HSLFs. HSLF is a smart material which can discern the exciting light to change color because of the photo-thermal effect. This characteristic provides optimum conditions for SZSO and YOS to store energy. The results demonstrated that most luminescence from SZSO and YOS could be absorbed by HSGP at 20 °C, but the luminescence could be liberated at 30 °C. The heat-stimulated phenomenon could also be verified by afterglow and the naked eye.

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“…It was also reported that co-doping Ce 3+ in Eu 2+ -doped Sr 2 SiO 4 phosphor also leads to white emission. 2 A large number of reports have been published recently in the literature relating to the various technological applications of lanthanide ions-doped Sr 2 SiO 4 such as in solid-state lighting, 3,4 as a thermochromic material, 5 as a dosimeter, 6 in long-afterglow phosphors, 7 in IR detection 8 and in long-lasting phosphorescence. 9 Catti et al 10 discussed the crystal structure of Sr 2 SiO 4 and reported that its unit cell consists of two different types of strontium ion; nine-coordinated Sr 2+ (Sr2) and 10-coordinated Sr 2+ (Sr1).…”

Section: Introductionmentioning

confidence: 99%

An insight into local environment of lanthanide ions in Sr₂SiO₄:Ln (Ln = Sm, Eu and Dy)

et al. 2015

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Sr 2 SiO 4 is an important inorganic host for lanthanide-doped white-light-emitting diodes. In order to probe the local structure and symmetry around lanthanide ions in Sr 2 SiO 4 , detailed experimental and theoretical investigations have been carried out. Samples prepared via sol-gel methods were thoroughly characterized using X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS) and photoluminescence (PL) spectroscopy. The local symmetries of SrO 9 and SrO 10 polyhedra were determined using emission spectroscopy with europium as the probe ion. Despite having the same oxidation state and comparable ionic radii, Sm 3+ , Dy 3+ and Eu 3+ behave differently in terms of their site occupation at the Sr sites of SrO 9 and SrO 10 polyhedra. While Eu replaces Sr in both polyhedra, Sm and Dy reside specifically at the 9-coordinated Sr sites only. Based on density functional theory (DFT) calculations, it has been established that for Dy and Sm, the strong metal-oxygen bonding leads to significant distortion and hence the destabilization of MO 10 polyhedra in the host.

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Thermochromic material Sr2SiO4:Eu2+ based on displacive transformation

Cited by 14 publications

References 16 publications

Crystal Structure and Luminescent Properties of Sr₂SiO₄:Eu²⁺ Phosphor Prepared by Sol-Gel Method

Crystal Structure and Luminescent Properties of Sr₂SiO₄:Eu²⁺ Phosphor Prepared by Sol-Gel Method

A Heat-Stimulated Luminous Fiber Using Heat-Sensitive Green TF-G Pigment

An insight into local environment of lanthanide ions in Sr₂SiO₄:Ln (Ln = Sm, Eu and Dy)

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Thermochromic material Sr2SiO4:Eu2+ based on displacive transformation

Cited by 14 publications

References 16 publications

Crystal Structure and Luminescent Properties of Sr2SiO4:Eu2+ Phosphor Prepared by Sol-Gel Method

Crystal Structure and Luminescent Properties of Sr2SiO4:Eu2+ Phosphor Prepared by Sol-Gel Method

A Heat-Stimulated Luminous Fiber Using Heat-Sensitive Green TF-G Pigment

An insight into local environment of lanthanide ions in Sr2SiO4:Ln (Ln = Sm, Eu and Dy)

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Product

Resources

About

Crystal Structure and Luminescent Properties of Sr₂SiO₄:Eu²⁺ Phosphor Prepared by Sol-Gel Method

Crystal Structure and Luminescent Properties of Sr₂SiO₄:Eu²⁺ Phosphor Prepared by Sol-Gel Method

An insight into local environment of lanthanide ions in Sr₂SiO₄:Ln (Ln = Sm, Eu and Dy)