Resonance energy transfer in ZnS:Mn crystals in the processes of photoluminescence and electroluminescence

Bulanyǐ, M. F.; Gorban, Alexander N.; Коваленко, А. В.; Polezhaev, B. A.

doi:10.1134/1.1563683

Cited by 7 publications

(9 citation statements)

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“…At λ exc = 337 nm, the exciting-radiation energy can be transferred to the manganese luminescence centers by the resonance mechanism because this wavelength coincides with none of the absorption bands of the Mn 2+ ions in ZnS crystals. In this case, the self-activated luminescence centers serve as sensitization centers, which is supported by the numerous data of other investigations [8,13,16,17]. On such excitation, the MC-sensitizers can participate in the resonance interaction with the manganese luminescence centers only by the multistage mechanism (Fig.…”

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confidence: 54%

“…At an insufficient concentration of these ions, the number of local sites where MC-sensitizers could exchange energy with manganese luminescence centers is infinitesimally small, which makes the realization of the second above-indicated condition impossible for most of the manganese luminescence centers. Actually, according to the data of [12,13], beginning with the concentration C Mn = 1⋅10 −3 g/g, the average distance between the manganese centers can be of the order of 10 A°, which corresponds to two or three lattice constants and is sufficient for a resonance energy transfer by the dipole-dipole interaction mechanism. The data of our investigations show that a "blue" photoluminescence band is absent in the 360-580-nm range of the spectrum of ZnS:Mn crystals excited by radiation with λ exc = 441 nm, which points to the fact that the self-activated "blue" radiation centers are not excited in this case and, consequently, cannot be sensitization centers for manganese luminescence centers.…”

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Mechanism of photoluminescence excitation of Mn2+ ions in ZnS crystals

2005

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535.37The mechanisms of photoluminescence excitation of Mn 2+ ions in ZnS crystals have been investigated on the basis of complex analysis of the temperature dependences of the photoluminescence and photoluminescence-excitation spectra of ZnS:Mn crystals. The activation energy of a manganese luminescence center was estimated at E a = 0.17 0.05 eV. It is shown that E a represents an energy band with a width ∆E a = 0.1 eV, within which a manganese luminescence center can experience radiationless recombination.Keywords: temperature dependence of photoluminescence spectra, luminescence center of manganese, excitation spectrum, activation energy of manganese center, ZnS crystals.Introduction. Zinc sulfide crystals doped with Mn 2+ ions have long been studied. However, up to now, there has been no clear idea on the mechanisms of transfer of the excitation energy to different manganese centers (MC) of luminescence in zinc sulfide crystals exposed to temperature action or exciting radiation. At the same time, such information would allow one not only to predict the operation of various luminescent devices based on ZnS:Mn cryctals, but also to widen fundamental notions of the monomolecular-luminescence process as a whole.An our opinion, the indicated problems can be solved by investigating, in complex, the photoluminescence and photoluminescence-excitation spectra of ZuS:Mn crystals with different concentrations of an activator at different exciting-radiation energies and temperatures.Samples and Experimental Procedure. ZnS:Mn crystals grown from a melt under an argon pressure by the Bridgman-Stockbarger method [1] were investigated. The concentration of Mn 2+ ions in a mixture was equal to C Mn = 1⋅10 −4 -5⋅10 −2 g of MnS/g of Zn (hereinafter g/g). As the exciting radiation sources, we used LGN-517 lasers with a radiation wavelength λ exc = 441 nm corresponding to the absorption band of Mn 2+ ions in ZnS crystals and

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Mechanism of photoluminescence excitation of Mn2+ ions in ZnS crystals

2005

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“…The original crystals with microtwinned structure and cubic 3C symmetry consisted of microblocks misoriented relative to each other by 2-3 o . For excitation of photoluminescence, we used LGI-505 and LGN-517 lasers with wavelengths of λ ex = 337 nm and 441 nm, which in the first case corresponds to intrinsic absorption of ZnS and in the second case corresponds to one of the absorption bands of the Mn 2+ ion in the ZnS crystals, associated with the transition 6 A 1 ( 6 S) →…”

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“…Starting from C Mn = 1⋅10 -3 g/g, the distances between manganese centers prove to be sufficient for resonance interaction to occur between them [3,6,7]. However, according to the data in [8], transfer of the excitation energy of the manganese centers by means of a resonance interaction between them is not predominant, since at the wavelength of the exciting light λ ex = 441 nm, the changes in the intensity of the photoluminescence spectra as the temperature varies are several of orders of magnitude smaller than in the case of excitation by light with λ ex = 337 nm, when only resonance mechanisms can occur for transfer of the photoluminescence excitation energy.…”

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Temperature dependence of photoluminescence and electroluminescence of ZnS:Mn crystals

et al. 2006

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535.37:548By means of comprehensive analysis of the temperature dependences of the photoluminescence for ZnS:Mn crystals, we have observed persistent changes in the intensity, shape, and position of the maximum in the emission spectrum associated with changes in the immediate environment of the manganese luminescence centers. We have also observed inflection points on the voltage vs. brightness characteristics of the samples, the position of which depends on the frequency of the exciting voltage and the temperature. The observed dependences are explained using concepts describing the mechanisms of pre-breakdown luminescence.Introduction. The complex structure of the "manganese" emission band in ZnS:Mn crystals, associated with different local environments of the Mn 2+ ions in the crystal lattice [1-3], means complex temperature dependences of the optical characteristics of ZnS. In this work, we studied the effect of temperature on the intensity of emission for photoluminescence (PL) and electroluminescence (EL) of ZnS:Mn single crystals.Samples and experimental procedure. Samples of the crystals were grown from the melt under argon pressure. The salt α-MnS was used as the activator. The original crystals with microtwinned structure and cubic 3C symmetry consisted of microblocks misoriented relative to each other by 2-3 o . For excitation of photoluminescence, we used LGI-505 and LGN-517 lasers with wavelengths of λ ex = 337 nm and 441 nm, which in the first case corresponds to intrinsic absorption of ZnS and in the second case corresponds to one of the absorption bands of the Mn 2+ ion in the ZnS crystals, associated with the transition 6 A 1 ( 6 S) →

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“…The excitation of Mn-related centers was investigated in a number of works [23][24][25][26][27][28]. It is usually supposed that the centers that mainly contribute to the emission are excited by the resonance energy transfer from Mn ions in the lattice sites…”

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New insight on the interaction of self-activated and Mn-related emission centers in ZnS

Bacherikov

Vorona

Zhuk

et al. 2017

Semicond. Sci. Technol.

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The photoluminescence (PL) and PL excitation (PLE) spectra of undoped and thermally doped with Mn ZnS single crystals are studied. In the PL spectra, the bands caused by Mn-related and self-activated (SA) emission centers were observed. A number of narrow peaks whose intensity enhanced with increasing Mn content were found in the PLE spectra of SA emission. The same peaks were present in the PLE spectra of the Mn-related emission band. Some of these peaks were previously observed in the absorption spectra and attributed to Mn 2+ ions. The appearance of Mn-related peaks in the PLE spectra of SA emission is explained by excitation transfer from the Mn 2+ ions to SA emission centers. The conditions required for this transfer and possible mechanisms of the process are discussed.

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Resonance energy transfer in ZnS:Mn crystals in the processes of photoluminescence and electroluminescence

Cited by 7 publications

References 1 publication

Mechanism of photoluminescence excitation of Mn2+ ions in ZnS crystals

Mechanism of photoluminescence excitation of Mn2+ ions in ZnS crystals

Temperature dependence of photoluminescence and electroluminescence of ZnS:Mn crystals

New insight on the interaction of self-activated and Mn-related emission centers in ZnS

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