Unusual Bismuth luminescence in Strontium Tetraborate (SrB4O7:Bi)

Blasse, G.; Meijerink, Andries; Nomes, M.; Zuidema, J.

doi:10.1016/0022-3697(94)90075-2

Cited by 128 publications

(112 citation statements)

References 19 publications

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“…Formation energy estimations based on the calculated total energies of corresponding unit cells show that Bi 3+ centers are favorable. Calculated wavelengths of the absorption bands of such Bi 3+ and Bi 2+ centers in GeS 2 network agree well with the experimental data available on the spectral properties of similar Bi-related centers in several hosts [18][19][20][21][22]. These centers are not related to IR luminescence and are of no interest for our investigation, since both the absorption and luminescence bands of the centers fall in the host self-absorption range.…”

Section: Modeling Of Bi-related Luminescence Centerssupporting

confidence: 81%

Infrared luminescence in Bi-doped Ge–S and As–Ge–S chalcogenide glasses and fibers

Плотниченко

Philippovskiy

Sokolov

et al. 2014

Opt. Mater. Express

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Experimental and theoretical studies of spectral properties of chalcogenide Ge-S and As-Ge-S glasses and fibers are performed. A broad infrared (IR) luminescence band which covers the 1.2-2.3 µm range with a lifetime about 6 µs is discovered. Similar luminescence is also present in optical fibers drawn from these glasses. Arsenic addition to Ge-S glass significantly enhances both its resistance to crystallization and the intensity of the luminescence. Computer modeling of Bi-related centers shows that interstitial Bi + ions adjacent to negatively charged S vacancies are most likely responsible for the IR luminescence.

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Section: Modeling Of Bi-related Luminescence Centerssupporting

confidence: 81%

Infrared luminescence in Bi-doped Ge–S and As–Ge–S chalcogenide glasses and fibers

Плотниченко

Philippovskiy

Sokolov

et al. 2014

Opt. Mater. Express

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“…Figure 3 shows that annealing at 550ºC causes the increase of a band centered at about 745 nm, which dominates the spectra of the annealed samples, and that after annealing above 550ºC (sample e), the PL intensity at 745 nm doesn't increase significantly. The emission peak at 745 nm most probably owes to lower-valent Bi ions [27,28]. sion band peaks around 1250 nm, but after annealing at 650 or 750ºC, the peaks at about 1250 nm are getting very weaker.…”

Section: Resultsmentioning

confidence: 99%

“…The emissions were both excited by 391 nm Xe lamp.Figure 5shows that Mo: Bi 12 GeO 20 annealing in H 2 at 300ºC (here Bi micro drops appeared a little) induces the decrease of a band centered at about 538 nm. The emission peak at 538 nm probably also owes to lower-valent Bi ions[27,28], and the decay time of Mo: Bi 12 GeO 20 (untreated) is 9.3 μs; seeFigure 4(b). The insert in Figure 5 may be the emission of Bi micro drops (Bi micro drops coat the surface of Mo: Bi 12 GeO 2 after annealing in H 2 at 450ºC).…”

mentioning

confidence: 99%

Study on photoluminescence of thermally treated Bi12GeO20 and Mo:Bi12GeO20 crystals

Tang

et al. 2011

Sci. China Technol. Sci.

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Photoluminescence (PL) of Bi 12 GeO 20 and Mo doped Bi 12 GeO 20 (Mo: Bi 12 GeO 20 ) crystals in visible and near-infrared (NIR) spectral regions were studied. X-ray diffraction analysis, absorption and Raman scattering spectra of these crystals were also measured. Pure Bi 12 GeO 20 after annealing in N 2 atmosphere at 450 ºC and 550 °C show predominant emissions at about 745 and 1250 nm bands, while the emission peaks of Mo:Bi 12 GeO 20 crystals untreated or after annealing in Ar at 300 °C are at around 538 and 1165 nm. The results suggest that annealing induces intrinsic luminescence of Bi in pure Bi 12 GeO 20 at room temperature and Mo influences the luminescence centers of Bi 12 GeO 20.

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“…69 Bi 2þ has characteristic red luminescence and three excitation bands. 67 By changing doping concentration of Bi-doped Sr 2 P 2 O 7 crystal, two red emission bands ascribed to Bi 2þ in two Sr sites are observed when excited by 450 nm. 68 For germanate glasses, the two bands at 720 and 780 nm of our results may also come from Bi 2þ in two distinct sites and their relative content can be controlled to realize wavelength and intensity tunable luminescence via changing excitation wavelength, doping level, and melting atmosphere.…”

Section: -6mentioning

confidence: 97%

Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses

Zhou

Tan

et al. 2013

Journal of Applied Physics

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Here, we present three facile approaches to achieve wavelength tunable luminescence in the same host material with single dopant, i.e., by modulating doping level, preparation temperature, and atmosphere. Based on these methods, ultra-broadband tunable near-infrared luminescence with the largest full width at half maximum of about 500 nm covering the whole windows of optical communication has been obtained in bismuth-doped germanate glasses. Wavelength tunable luminescence is also observed with the change of excitation wavelength. Systematical strategy was followed to approach the physical origin of the near-infrared luminescence and we proposed that three different bismuth active centers contribute to the near-infrared luminescence in the germanate glasses. A comprehensive explanation for the tunable luminescence is given, combining the concentration, energy transfer, and chemical equilibrium of these active centers in the glasses. With the increase of melting temperatures and the increase of reducing extent of the preparation atmosphere, bismuth species transform from Bi 3þ to Bi 2þ , Bi þ , Bi 0 and bismuth clusters, and then to bismuth colloid. Of particular interest is that red tunable luminescence was also observed by modulating doping level, preparation atmosphere, and excitation wavelength. Besides, the trapped-electron centers in germanate glasses can interact with bismuth species of high valence states leading to the formation of bismuth active centers of low valence states and the decrease of trapped-electron centers. This tunable ultra-broadband luminescence is helpful for a better understanding of the origin of the near-infrared luminescence in Bi-doped glasses and may have potential applications in varieties of optical devices. V C 2013 American Institute of Physics. [http://dx

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Unusual Bismuth luminescence in Strontium Tetraborate (SrB4O7:Bi)

Cited by 128 publications

References 19 publications

Infrared luminescence in Bi-doped Ge–S and As–Ge–S chalcogenide glasses and fibers

Infrared luminescence in Bi-doped Ge–S and As–Ge–S chalcogenide glasses and fibers

Study on photoluminescence of thermally treated Bi12GeO20 and Mo:Bi12GeO20 crystals

Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses

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