The luminescence of CaWO4: Bi single crystals

Zorenko, Yu.; Pashkovsky, M.; Voloshinovskii, А.; Kukliński, B.; Grinberg, M.

doi:10.1016/j.jlumin.2005.01.017

Cited by 46 publications

(24 citation statements)

References 16 publications

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“…(2) CaWO 4 shows high chemical stability, high average refractive index, high light yield and has been studied extensively for decades due to its intriguing luminescent properties [21]. Moreover, by doping with transition metal ions and lanthanide ions, CaWO 4 can generate multi-color emissions by single-wavelength light excitation, which enables its promising applications, like solid-state lighting devices, field emission displays as well as luminescent labels [22].…”

Section: Introductionmentioning

confidence: 99%

Low temperature nanocasting synthesis of lanthanide ions (Ln = Tb, Eu, Dy) doped CaWO4 mesoporous structure with efficiently luminescent properties

Lang

et al. 2013

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Low temperature nanocasting synthesis of lanthanide ions (Ln = Tb, Eu, Dy) doped CaWO4 mesoporous structure with efficiently luminescent properties

Lang

et al. 2013

Journal of Colloid and Interface Science

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“…doi:10.1016/j.jcis.2011.04.094 emission of the CaWO 4 phosphor is a broad band centered at 420 nm, which is owing to the electronic transition of chargetransfer type between oxygen and tungsten ions within the complex anion WO 2À 4 . Moreover, some novel optical properties of this classic phosphor can be obtained by doping with transition metal ions or rare-earth ions [24,25]. In addition, to enhance its physical performance, differently ordered morphology is usually needed.…”

Section: Introductionmentioning

confidence: 99%

Controllable synthesis and luminescent properties of three-dimensional nanostructured CaWO4:Tb3+ microspheres

Tian

Chen

et al. 2011

Journal of Colloid and Interface Science

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“…18a It is well known that Bi 3+ ion has an absorption band at around 290 nm corresponding to 1 S 0 → 3 P 1 transition. 19 Thus, one possibility is that there remains unreacted Bi 3+ embedded in the product, which could act as an sensitizer for Bi 5 3+ and Bi 8 2+ polycations. However, now we can not rule out the contribution 85 of structural defects or other impurities to this band, since it extends from 250 to 367 nm, much broader than that of Bi 3+ .…”

mentioning

confidence: 99%

Experimental and theoretical studies of photoluminescence from Bi82+ and Bi53+ stabilized by [AlCl4]− in molecular crystals

et al. 2012

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. Please use this new link.Compared with the old version, we revised the errors in it. We also tried to 5 get the ratio of Bi 8 (AlCl 4 ) 2 to Bi 5 (AlCl 4 ) 3 , based on the suggestions from the co-authors and colleagues, but did not succeed, possibly due to the poor signal to noise ratio of XRD spectrum.There are one simple route for further obtaining detailed information of 10 Bi 8 2+ .One can synthesize high-quality single crystal through method developed in Eur. J. Inorg. Chem., 2005, 670. 15 This result further suggests that the establishment of structure-property relationships is the first and the most important step to get a clearer picture of the PL mechanism related to bismuth species. 20 25 CREATED USING THE RSC ARTICLE TEMPLATE (VER. 3.0) -SEE WWW.RSC.ORG/ELECTRONICFILES FOR DETAILS Experimental details 75 Sample preparationThe product was synthesized by a modified method reported by Corbett et al. and Beck et al.. 1b,17 AlCl 3 (Sigma-Aldrich, 99.99%), BiCl 3 (Alfa Aesar, ultra dry, 99.997%), Bi powder (Alfa Aesar, 99.999%) were used as received. Because of the high moisture 80 sensitivity of the anhydrous metal halides used in this work, all manipulations were performed under dry N 2 atmosphere in a glovebox (< 2 ppm H 2 O; < 0.1 ppm O 2 ). A mixture of BiCl 3 , AlCl 3 , and Bi was enclosed in a glass tube under vacuum and heated in a muffle furnace. for one week, then undergoes an initial cooling from 350°C to 160°C at a rate of 10 o C/h, and finally is cooled very slowly with 2°C/h from 160°C to 130°C. The obtained black product was seperated and sealed in bottles or capillaries for the following measurements. 5 Materials characterizationThe product was characterized by X-ray diffractometer (Rigaku-RINT Ultima3, λ=1.54056 Å). The sample was grounded into powders, sealed in 1 mm Hilgenberg borosilicate capillaries and kept spinning during the measurement. The EEM was taken by 10 Horiba NanoLog spectrofluorometer equipped with a monochromated Xe lamp and a liquid N 2 cooled photomultiplier tube (Hamamatsu, R5509-72). The powder was sandwiched between a glass microscope slide and a quartz cover glass and sealed with glue. Emission spectra were taken at different 15 excitation wavelengths from 250 to 910 nm with 20 nm intervals. All spectra were corrected for spectral response of the detection system. Time-resolved PL measurements were performed by detecting the modulated luminescence signal with a photomultiplier tube (Hamamatsu,, and then analyzing 20 the signal with a photon-counting multichannel scaler. The excitation source for the time-resolved PL measurements was 600 nm light (pulse width: 5nsec; frequency: 20Hz) from an optical parametric oscillator pumped by the third harmonic of a Nd:YAG laser. The detailed quantum chemistry calculation on Bi 8 2+ 25 polycation is shown in the following section. Results and discussionThe crystallinity of as-prepared products was examined by PXRD (Fig. 1a) (Fig. 1b). The [AlCl 4 ] -ions render the compounds air-and moisture-sensitive because of 40 the ...

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The luminescence of CaWO4: Bi single crystals

Cited by 46 publications

References 16 publications

Low temperature nanocasting synthesis of lanthanide ions (Ln = Tb, Eu, Dy) doped CaWO4 mesoporous structure with efficiently luminescent properties

Low temperature nanocasting synthesis of lanthanide ions (Ln = Tb, Eu, Dy) doped CaWO4 mesoporous structure with efficiently luminescent properties

Controllable synthesis and luminescent properties of three-dimensional nanostructured CaWO4:Tb3+ microspheres

Experimental and theoretical studies of photoluminescence from Bi82+ and Bi53+ stabilized by [AlCl4]− in molecular crystals

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