Associated Donor-Acceptor Luminescent Centers

Prener, J. S.; Williams, Ferd

doi:10.1103/physrev.101.1427

Cited by 97 publications

(30 citation statements)

References 6 publications

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“…where it has been assumed that both I (1) and J h decrease at the same rate with displacement, both paralleling the decrease of the molecular wave function. The quantity -5* is a typical nonorthogonality integral It is seen that the ratio (4.1) is entirely negligible for elastic scattering.…”

Section: Application To Base-centered-mono Clinic Structurementioning

confidence: 99%

“…(2.10), have been estimated by LeBlanc on the basis of the same wave functions and potentials used in his paper. 1 He finds W° [Eq. (11.12)] -50 to 100 smaller that J h° [Eq.…”

Section: Application To Base-centered-mono Clinic Structurementioning

confidence: 99%

“…With this and other modifications, the revised bandwidths are of the order of those originally computed by LeBlanc. In view of the smallness of koT with respect to hooo (^0.2 eV), it is evident that carriers move predominantly in the ground-state vibronic level corresponding to the lowest occupied electronic molecular orbital (or highest occupied molecular orbital in the 1 The experimental evidence is that band motion, rather than thermally activated site-jump transitions, is the predominant conduction mechanism in organic crystals of the anthracene type. This is the assumption of the present paper.…”

Section: Introductionmentioning

confidence: 97%

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Electron-Phonon Interaction in Organic Molecular Crystals

Friedman

1965

Phys. Rev.

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A theory of acoustic-mode scattering has been formulated within the tight-binding approximation of band theory, and has been applied to narrow-band semiconduction in organic molecular crystals. The latter problem has been treated previously only in terms of phenomenological scattering parameters. The interaction constants are obtained explicitly as gradients of the characteristic overlap integrals. In addition, the wave-vector dependence of the matrix elements is taken into account. To first order in the (relative) displacements, the matrix elements include scattering by short-wavelength phonons, an essential feature of the narrow-band case not treated by conventional deformation-potential theory. The matrix elements physically represent variations of the band width and band centroid with relative displacement; in addition small (drag) terms proportional to the local lattice velocities are obtained. The theory is first applied to a onedimensional band model, for the case of both elastic and inelastic scattering. It is then applied to the basecentered-monoclinic structure, for which numerical estimates of the interaction constants have been made available by LeBlanc for anthracene.

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Section: Application To Base-centered-mono Clinic Structurementioning

confidence: 99%

“…(2.10), have been estimated by LeBlanc on the basis of the same wave functions and potentials used in his paper. 1 He finds W° [Eq. (11.12)] -50 to 100 smaller that J h° [Eq.…”

Section: Application To Base-centered-mono Clinic Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Electron-Phonon Interaction in Organic Molecular Crystals

Friedman

1965

Phys. Rev.

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“…Investigation of the broad photoluminescence bands of emission in the ZnS-Cu,In-phosphors was begun as early as in 1956 by Prener and Williams [17]. At the present time, in the majority of works devoted to this problem, mainly broad bell-shaped photoluminescence bands are considered, and the proposed mechanisms of radiative recombination of the indicated bands [8] refer only to the photoluminescence centers.…”

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confidence: 99%

Electro- and photoluminescence of compounds based on doped zinc sulfide in the 500–750-nm range

et al. 2005

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UDC 535.376The influence of atmospheric passivation on the electro-and photoluminescent properties of ZnS powders doped with In and/or CuCl is investigated. The processes proceeding in the material during thermal doping with In and/or CuCl as well as participation of oxygen in forming the electro-and photoluminescent radiation centers are discussed. The possibility of creating electro-and photoluminophors based on ZnS that have a continuous spectrum in the visible range with the same spectral density is shown. An electroluminophor based on ZnS:In,Cu,Cl that emits radiation with practically the same spectral density in the 550-750-nm range has been created as well as a photoluminophor based on ZnS:In that emits similarly within the range 500 < λ < 700 nm.

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“…Identification of those phenomena gave rise to intensive physical and chemical investigations to find the nature of the phenomenon and to elaborate its models. A classical model that proved correct has been proposed by Fischer [5] and developed by Prener and Williams [6].…”

Section: Introductionmentioning

confidence: 99%