Effects of hydrostatic pressure on the low-temperature photoluminescence spectrum of heavily doped CdS

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Effects of hydrostatic pressure on the low-temperature photoluminescence spectrum of heavily doped CdS

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/8182

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Title: Effects of hydrostatic pressure on the low-temperature photoluminescence spectrum of heavily doped CdS
Author: Venkateswaran, Uma Devi; Chandrasekhar, Meera; Chandrasekhar, Holalkere R.
Keywords: photoacoustic effects
piezo-, elasto-, and acoustooptical effects
Date: 1985-05-15
Publisher: American Physical Society
Citation: Phys. Rev. B 31, 6574-6578 (1985)
Abstract: The photoluminescence spectrum of heavily doped CdS is studied under pressure at 300 and 6 K in a diamond anvil cell. The pressure-induced shift of the broad green luminescence peak at 300 K is found to depend on the impurity content of the sample. At 6 K, the I2 (donor-bound), I1 (acceptor-bound), G5 (bound-to-bound) excitons and the 1LO and 2LO replicas of G5 are observed in addition to a red luminescence due to the Cd interstitials. The pressure coefficients of the excitons and the LO replicas are slightly lower than that of the band edge. The red luminescence, on the other hand, shifts at a rate of 7.28±0.45 meV/kbar which is about 75% larger. These experiments did not indicate any pressure ionization of the donor impurities. No luminescence could be observed beyond the transition into an indirect-band-gap, rocksalt phase.
URI: http://hdl.handle.net/10355/8182
ISSN: 1098-0121

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