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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/28367

Title: Carrier-density dependence of the photoluminescence lifetimes in ZnCdSe/ZnSSe quantum wells at room temperature
Author: HEGARTY, JOHN
Author's Homepage: http://people.tcd.ie/jhegarty
Keywords: Administrative Staff Authors
Issue Date: 1999
Publisher: American Institute of Physics
Citation: C. Jordan, J. F. Donegan, J. Hegarty, B. J. Roycroft, S. Taniguchi, T. Hino, E. Kato, N. Noguchi, and A. Ishibashi ‘Carrier-density dependence of the photoluminescence lifetimes in ZnCdSe/ZnSSe quantum wells at room temperature’ in Applied Physics Letters, 74, (22), 1999, pp 3359 - 3361
Series/Report no.: Applied Physics Letters
74
Abstract: Photoluminescence lifetimes have been measured at room temperature as a function of carrier density in ZnCdSe/ZnSSe quantum wells. We show that, at low carrier density (5 × 109–5 × 1010 cm – 2), nonradiative recombination dominates, while radiative recombination becomes more dominant as the carrier density is increased from 5 × 1010 to 5 × 1011 cm – 2. Above ~ 5 × 1011 cm – 2, band filling effects are shown to produce a saturation of the lifetimes. A simple rate equation model approach can be used to describe the carrier density dependence of the photoluminescence decay data obtained on a wide range of samples. A representative band-to-band recombination coefficient of 8 × 10–4 cm2 s – 1 and a Shockley–Read–Hall rate of 7.3 × 107 s – 1 were determined for one of the better samples studied. We believe that the excellent quality of our samples has allowed for the radiative recombination coefficient to be characterized accurately at room temperature
Description: PUBLISHED
URI: http://link.aip.org/link/?APPLAB/74/3359/1
http://hdl.handle.net/2262/28367
ISSN: 0003-6951
Appears in Collections:Administrative Staff Authors (Scholarly Publications)

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