Spectroscopic detection of the V + (d 4 ) acceptor state in zinc selenide and zinc sulfide

Goetz, G.; Pohl, Udo W.; Schulz, Hans‐Joachim; Thiede, M.

doi:10.1016/0022-2313(94)90083-3

Cited by 17 publications

(7 citation statements)

References 4 publications

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“…The assignments discussed above are strongly supported by comparable structures found in ZnS:V and ZnSe:V. 11 Some differences observed with ZnTe should, however, be mentioned. The change of the chalcogene from S and Se to Te in the host crystal does not only induce an obvious significant decrease in the transition energies.…”

Section: Crystal-field Calculationsmentioning

confidence: 50%

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Vanadium centers in ZnTe crystals. I. Optical properties

et al. 1996

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In ZnTe:V bulk crystals with nominal vanadium concentrations between 1000 and 7000 ppm three vanadium-ion states V ϩ , V 2ϩ , and V 3ϩ were found in low-temperature optical measurements. No-phonon lines of the internal emissions were detected for the 5 E(D)→ 5 T 2 (D) transition of V ϩ ͑d 4 ͒ at 3401 cm Ϫ1 ͑0.422 eV͒, for 4 T 2 (F)→ 4 T 1 (F) of V 2ϩ ͑d 3 ͒ at 4056 cm Ϫ1 ͑0.503 eV͒, and for 3 T 2 (F)→ 3 A 2 (F) of V 3ϩ ͑d 2 ͒ at 4726 cm Ϫ1 ͑0.586 eV͒. The energies of the internal transitions are reduced with respect to the corresponding transitions in ZnS:V and ZnSe:V. The respective excitation spectra display, in addition to broad charge-transfer bands, higher excited levels of the individual charge states. Crystal-field calculations of the detected transition energies based on the Tanabe-Sugano scheme are presented. With the help of sensitization experiments, a one-electron model is designed, in which the donor level ͑V 2ϩ /V 3ϩ ͒ is situated 12 500 cm Ϫ1 ͑1.55 eV͒ below the conduction-band edge and the acceptor level ͑V 2ϩ /V ϩ ͒ 9400 cm Ϫ1 ͑1.17 eV͒ above the valence-band edge. The dynamical behavior of the three infrared luminescence bands was measured. Decay time constants of 43 s ͑V ϩ ͒, 120 s ͑V 2ϩ ͒, and 420 s ͑V 3ϩ ͒ were found. Electron-paramagnetic-resonance ͑EPR͒ results measured on the same samples are presented in an accompanying paper and confirm the optical detection of isolated substitutional V 2ϩ ͑d 3 ͒ and V 3ϩ ͑d 2 ͒ ions. Relations between the EPR and optical results are discussed.

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Section: Crystal-field Calculationsmentioning

confidence: 50%

“…This spectrum is similar to that of ZnSe:V ϩ up to 12 000 cm Ϫ1 , where in ZnSe a strong charge-transfer process starts. 11 In ZnTe, a weaker one commences at 11 000 cm Ϫ1 as well, assigned to process ͑11͒. In addition, a quite strong CT process ͑No.…”

Section: B Excitation Spectramentioning

confidence: 98%

Vanadium centers in ZnTe crystals. I. Optical properties

et al. 1996

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“…14 V Zn ϩ (A Ϫ ){3d 4 } could not yet be observed by EPR, although evidence for its occurrence was found by optical spectroscopy in ZnS and ZnSe. 15 The optical properties of V-doped II-VI compounds have been investigated for a long time, verifying transitions attributed to V 3ϩ ͑A ϩ ͒, V 2ϩ ͑A 0 ͒, and V ϩ ͑A Ϫ ͒. The vanadium ion thus proves to be an amphoteric impurity ͑Refs.…”

Section: Introductionmentioning

confidence: 99%

Vanadium centers in ZnTe crystals. II. Electron paramagnetic resonance

et al. 1996

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Four V-related electron-paramagnetic-resonance ͑EPR͒ spectra are observed in Bridgman-grown ZnTe doped with vanadium. Two of them are attributed to the charge states V Zn 3ϩ ͑A ϩ ͒ and V Zn 2ϩ ͑A 0 ͒ of the isolated V impurity. For the ionized donor, V Zn 3ϩ ͑A ϩ ͒, the spectrum reveals the typical behavior of the expected 3 A 2 (F) ground state in tetrahedral symmetry. The incorporation on a cation lattice site could be proved by the resolved superhyperfine interaction with four Te ions. The second spectrum showing triclinic symmetry and Sϭ 3 2 is interpreted as the neutral donor state V Zn 2ϩ ͑A 0 ͒. The origin of the triclinic distortion of the cubic (T d ) crystal field could be a static Jahn-Teller effect. The two additionally observed EPR spectra are attributed to nearest-neighbor V-related defect pairs. The spectrum of the first one, V Zn 2ϩ

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“…Theoretical investigation on the fine structure of the lasing 4 T 2 level in a CsCaF 3 : V 2+ have been recently carried out [46,47], taking the dynamic JT effect into account. Besides, extensive spectroscopic work has been done on V 2+ incompounds [39][40][41][42][48][49][50]. The V 2+ impurity presents well resolved and interesting spectra in ZnS and ZnSe; for the former, temperature effects in the emission spectra has been established (see Section 5).…”

Section: +mentioning

confidence: 98%

Dynamic Jahn-Teller effect in crystals doped with 3d ions

Martinelli

Bevilacqua

Vogel

2013

Optical Properties of 3d-Ions in Crystals: Spectroscopy and Crystal Field Analysis

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This chapter is devoted to the study of the dynamic Jahn-Teller effect on the optical spectra of 3d-ions impurities in crystals, with particular attention to the theoretical efforts addressed to the interpretation of the experimental results. The presentation assumes that the reader is familiar with the spectroscopic notation for atomic energy levels. In addition, basic concepts and notation of point-group theory are also used. First, we will present a survey of the main experimental and theoretical results according to the electronic configuration. Then we discuss with a tutorial style the main contributions needed to model the optical spectra of the Jahn-Teller active 3d-ions impurities and asimple example is discussed in details. Next we concentrate on the calculation procedures required to address realistic systems. Some applicative examples of the proposed procedure are described in details.

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Spectroscopic detection of the V + (d 4 ) acceptor state in zinc selenide and zinc sulfide

Cited by 17 publications

References 4 publications

Vanadium centers in ZnTe crystals. I. Optical properties

Vanadium centers in ZnTe crystals. I. Optical properties

Vanadium centers in ZnTe crystals. II. Electron paramagnetic resonance

Dynamic Jahn-Teller effect in crystals doped with 3d ions

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