The luminescence of the semimagnetic semiconductor Zn<sub>1-x</sub>Mn<sub>x</sub>Se

Waldmann, H.; Benecke, C.; Busse, W.; Gumlich, H.‐E.; Krost, A.

doi:10.1088/0268-1242/4/2/003

Cited by 21 publications

(12 citation statements)

References 22 publications

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“…A similar behavior has been observed earlier for this material, using different experimental techniques [8,9]. This anomaly of the energy gap with concentration is also exhibited by other DMS [8,16 to 181. 3ylsma et al [8] have attributed this anomalous behavior of the energy gap with the concentration x to the strong s-d and p-d exchange interactions common to all DMS.…”

Section: Discussionsupporting

confidence: 89%

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Optical Absorption Studies in Zn_1−xMn_xSe

Martinez

González

Giriat

1993

Physica Status Solidi (b)

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The optical absorption spectra of Zn, -,Mn,Se single crystals are investigated, for x = 0. 05,0.06,0.15, 0.30, 0.35, 0.45, and 0.50. The measurements were taken from 28 K to RT in the wavelength range between 390 to 520 nm. Four well-resolved bands below the fundamental absorption edge are observed corresponding to internal transitions from the ground to the excited state within the Mn ion. An initial decrease of the energy gap with the concentration x for all temperatures is found. A break in the monotonic dependence of the energy gap with temperature is observed at high Mn concentrations and low temperatures. This anomalous behavior is associated with the s-d and p-d exchange interactions occurring in diluted magnetic semiconductors (DMS).

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Section: Discussionsupporting

confidence: 89%

“…The broadness observed in the absorption bands as the temperature increases may be due to the perturbations introduced by the lattice vibrations. Similar effects have been observed in luminescence in the same alloy [16].…”

Section: Discussionsupporting

confidence: 81%

Optical Absorption Studies in Zn_1−xMn_xSe

Martinez

González

Giriat

1993

Physica Status Solidi (b)

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“…1, curve a ) has a pronounced maximum a t E = 2.68 eV. The excitation spectrum of the 4T, -+ 6A, emission band in this spectral region is dominated by the 4E excitation band of Mn2+ [7]. There is no temperature shift for this excitation maximum a t E = 2.68 eV.…”

Section: Resultsmentioning

confidence: 90%

The Enrgy Transfer between Free Excitons, Bound Excitons, and the 3d‐Shell of Mn²⁺ in Zn_1−xSe Mixed Crystals and the s–d Type Exchange Interaction

Stutnbäumer

Gumlich

Zuber

1989

Physica Status Solidi (b)

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Excitation spectra of the Mn2+ emission band 4T1 + 6A, of Znl-,Mn,Se and their dependence on the crystal temperature and the manganese concentration (x 5 0.016) gives evidence of an excitonic energy transfer from free and bound excitons to the 3d-shell of Mn2+. Reflection spectra and the comparison of excitation maxima of free and bound excitons reveal some steps of the transfer of excitonic energy to. the luminescence centre Mn2+ in Znl-,Mn,Se.The full spinsplitting of bound excitons which is not determined by former luminescence experiments is observed (up to 90 meV at B = 5 T) in excitation spectroscopy of the Mn2+ emission band and the

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“…The PL peak G4.8.2 around ∼420 nm is attributed to a sub-bandgap luminescence of the ZnSe host lattice [11]. The peak at ∼570 nm is attributed to the 4 T 1 → 6 A 1 transition in the Mn 2+ ion and is similar to Mn 2+ in bulk ZnSe [13]. For samples containing 0.9 % Mn 2+ the total luminescence quantum efficiency (dominated by the Mn 2+ PL) has become comparable to that of the undoped sample (dominated by the ZnSe PL).…”

Section: Results For Znse:mn 2+ Nanocrystal Powdersmentioning

confidence: 93%

Luminescence of doped nanocrystalline ZnSe

et al. 2001

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Luminescence of nanocrystalline ZnSe:Mn 2+ and ZnSe:Cu 2+ prepared via an organic chemical synthesis method are described. The spectra show distinct ZnSe, Mn 2+ and Cu 2+ related emissions, all of which are excited via the host lattice. The Mn 2+ emission wavelength depends on the concentration of Mn 2+ incorporated into the ZnSe lattice, which is attributed to the presence of Mn 2+ pair-states at higher concentrations. The ZnSe:Cu 2+ luminescence was studied as a function of the crystal-size. Temperature-dependent photoluminescence spectra and photoluminescence lifetime measurements are also presented and the results are compared to those of Mn 2+ and Cu 2+ in bulk ZnSe.

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The luminescence of the semimagnetic semiconductor Zn_1-xMn_xSe

Cited by 21 publications

References 22 publications

Optical Absorption Studies in Zn_1−xMn_xSe

Optical Absorption Studies in Zn_1−xMn_xSe

The Enrgy Transfer between Free Excitons, Bound Excitons, and the 3d‐Shell of Mn²⁺ in Zn_1−xSe Mixed Crystals and the s–d Type Exchange Interaction

Luminescence of doped nanocrystalline ZnSe

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The luminescence of the semimagnetic semiconductor Zn1-xMnxSe

Cited by 21 publications

References 22 publications

Optical Absorption Studies in Zn1−xMnxSe

Optical Absorption Studies in Zn1−xMnxSe

The Enrgy Transfer between Free Excitons, Bound Excitons, and the 3d‐Shell of Mn2+ in Zn1−xSe Mixed Crystals and the s–d Type Exchange Interaction

Luminescence of doped nanocrystalline ZnSe

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The luminescence of the semimagnetic semiconductor Zn_1-xMn_xSe

Optical Absorption Studies in Zn_1−xMn_xSe

Optical Absorption Studies in Zn_1−xMn_xSe

The Enrgy Transfer between Free Excitons, Bound Excitons, and the 3d‐Shell of Mn²⁺ in Zn_1−xSe Mixed Crystals and the s–d Type Exchange Interaction