Time-resolved measurements of photoluminescence in As—S alloy glasses and films evaporated from a-As2S3

Abstract The excitation-energy dependence of photoluminescence (PL) measured at short times after 10 ns pulsed excitation and of the spectrally integrated total-light decay (TLD) have been measured for a variety of glasses containing As and S. Measurements are reported for bulk glasses of compositions As35S65, As40S60 and As42S58, as well as for thin films evaporated from bulk a-As2S3 which were either measured as prepared, after annealing, or after several hours of optical irradiation. It was found that the short-time (zero-delay) PL spectrum is very sensitive to sample composition and molecular structure. Although only slight variations in the TLD were observed, the zero-delay spectrum changed drastically from sample to sample. Concomitant effects were observed in the quantum efficiency at short times. The results are discussed in terms of some of the current models for the PL mechanism.

[1]  T. Ninomiya,et al.  Photoluminescence Decay in Amorphous As2S3 , 1982 .

[2]  B. Cavenett,et al.  Exciton and Pair Recombination at Intimate Valence-Alternation Pairs ina-As2S3 , 1982 .

[3]  P. J. Gaczi.  As and S centred paramagnetic species in sulphide glasses , 1982 .

[4]  M. Kastner,et al.  Measurement of the time evolution of the photoluminescence spectrum ofa-As2S3 , 1981 .

[5]  M. Kastner,et al.  Excitation-Energy Dependence of Photoluminescence Bandwidth in a - As 2 S 3 : Observation of the Mobility Gap? , 1981 .

[6]  J. C. Phillips.  Topological model for non-radiative carrier decay in chalcogenide alloy glasses , 1980 .

[7]  K. Kimura,et al.  Time dependence of the polarization of the luminescence in chalcogenide glasses , 1980 .

[8]  J. Shah,et al.  Time-Resolved Photoluminescence Spectroscopy in Amorphous As 2 S 3 , 1979 .

[9]  M. Kastner,et al.  Evidence for the neutrality of luminescence centres in chalcogenide glasses , 1978 .

[10]  T. Ninomiya,et al.  Luminescence with short decay time in arsenic chalcogenide glasses , 1977 .

[11]  R. Street.  Luminescence in amorphous semiconductors , 1976 .

[12]  R. Street,et al.  Photoluminescence in chalcogenide crystals showing small polaron conduction; orthorhombic sulphur and As4S4 , 1975 .

[13]  Marc Kastner,et al.  Bonding Bands, Lone-Pair Bands, and Impurity States in Chalcogenide Semiconductors , 1972 .

[14]  S. W. Ing,et al.  Photodecomposition of Amorphous As2Se3 and As2S3 , 1971 .

[15]  B. Kolomiets,et al.  Radiative recombination in vitreous and single crystal As2S3 and As2Se3 , 1970 .

[16]  M. Kastner,et al.  Excitation-energy dependence of the photoluminescence total-light decay in arsenic chalcogenides , 1983 .

[17]  T. Ninomiya,et al.  Luminescence and optically detected ESR in a-As2S3 , 1980 .

[18]  M. Kastner,et al.  Time resolved spectroscopy of valence-alternation-pair luminescence in a-As2S3 , 1980 .

[19]  D. Emin.  Dynamics of the optically induced properties of a small-polaronic glass , 1980 .

[20]  R. Street,et al.  Thermally induced effects in evaporated chalcogenide films. I. Structure , 1978 .