Luminescence of cation excitons in and crystals in a wide excitation VUV region

Kink, R.; Avarmaa, Tea; Kisand, Vambola; Lõhmus, Ants; Kink, Ilmar; Martinson, I.

doi:10.1088/0953-8984/10/3/020

Cited by 25 publications

(27 citation statements)

References 14 publications

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“…This emission is excited in the region of the cation exciton absorption band, corresponding to the transition of 1 S 0 -3 P 1 of Pb 2+ . The similar cation exciton emission peaking at 3.8 eV with the exciton excitation of 4.7 eV at 8 K in PbCl 2 was also reported [13]. From the reflection and excitation spectra of PbFCl, the cation exciton absorption peaking at 247 nm was observed.…”

Section: Article In Presssupporting

confidence: 81%

Luminescence spectra of PbFCl single crystal under the excitation of synchrotron radiation VUV–UV

Liu

Shi

et al. 2005

Journal of Luminescence

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Section: Article In Presssupporting

confidence: 81%

Luminescence spectra of PbFCl single crystal under the excitation of synchrotron radiation VUV–UV

Liu

Shi

et al. 2005

Journal of Luminescence

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“…It has been concluded in [4,7,12,13,18] that these bands belong to the self-trapped cation excitons (STE). (However, some authors do not connect the B band with the STE, see, e.g., [15,16,22,24].)…”

Section: Discussionmentioning

confidence: 99%

“…In [19], the structural model has been proposed for the STE of the first type: this is the {Pb þ (X --) 3 þ hole}-type STE (see also [28,39]). As both types of emissions can be excited by Xrays [25] and in the band-to-band transitions region [7] (see also Figs. 1a and 1b), the STEL of the Pb þ -and (Pb 2 ) 3þ -types should be detected in PbCl 2 by the ESR method.…”

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confidence: 99%

On the Interpretation of Luminescence of Lead Halide Crystals

Babin¹,

Krasnikov²,

Nikl

et al. 2002

phys. stat. sol. (b)

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Emission and excitation spectra, and the luminescence decay kinetics have been studied for PbCl 2 crystals at the temperatures 0.45-100 K. It has been found that even at the lowest temperatures, where the non-radiative decay of exciton states in PbCl 2 does not take place, the decay times of both the ultraviolet (UV) and the blue (B) exciton emission are by a few orders of magnitude shorter than the decay times of the emission arising from the triplet relaxed excited state of Pb 2þ centres in lead-doped ionic crystals. A conclusion has been drawn that the luminescence of lead halides cannot be connected with single Pb 2þ ions. It is proposed that the radiative decay of the self-trapped excitons of the type of {(Pb 2 ) 3þ þ hole} is responsible for the UV and the B emission of PbCl 2 crystals, while the lowest-energy (BG) emission arises from the tunnelling recombinations between the (Pb 2 ) 3þ -type self-trapped electrons and V K -type self-trapped holes.

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“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] They are also attractive materials for practical use, e.g., as a scintillating substance (PbF 2 ) ͑Ref. 2͒ and as acousto-optical crystals (PbCl 2 and PbBr 2 ) ͑Refs.…”

Section: Introductionmentioning

confidence: 99%

Optical spectra and electronic structures of lead halides

et al. 2000

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Polarized reflectivity spectra of single crystals of ␣-PbF 2 , ␤-PbF 2 , PbCl 2 , and PbBr 2 have been measured at 10 K in the energy range up to 30 eV using synchrotron radiation as a light source. The spectra are well resolved in comparison with those reported previously. Optical constants have been derived through the Kramers-Kronig analysis. The effect of phase transition on the optical spectra of PbF 2 is also examined. With use of the discrete variational X␣ method, the electronic structures of the clusters consisting of a Pb 2ϩ ion and neighboring halogen ions have been calculated for better understanding of the optical properties of Pb halides. The calculation indicates that the lowest excitons in all lead halides are attributed to the cationic transitions. The electronic structures of lead halides are discussed on the basis of a comparison of experiment and calculation.

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Luminescence of cation excitons in and crystals in a wide excitation VUV region

Cited by 25 publications

References 14 publications

Luminescence spectra of PbFCl single crystal under the excitation of synchrotron radiation VUV–UV

Luminescence spectra of PbFCl single crystal under the excitation of synchrotron radiation VUV–UV

On the Interpretation of Luminescence of Lead Halide Crystals

Optical spectra and electronic structures of lead halides

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