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Photoluminescence characterisation of bismuth-doped GaSb

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2 Author(s)
M. Kucera ; Inst. of Electr. Eng., Slovak Acad. of Sci., Bratislava, Slovakia ; J. Novak

The paper reports on a photoluminescence (PL) characterisation of bismuth-doped gallium antimonide prepared by a travelling heater method (THM) with a Bi-zone. Detailed PL inspection of samples was done, including probing of various surface regions and PL temperature and pump intensity dependencies. In the material grown at 650°C significant shifts of PL peaks and the band-gap narrowing (BGN) were proved by spectral characterisation methods, and caused most likely by tension inside the sample. Material grown at 420°C exhibited very non-uniform luminescent properties. A part of the crystal near the crystal/seed interface showed almost pure excitonic spectra and a strong reduction of the GaSb native acceptor (NA). In regions distant from the interface PL features characteristic for a highly doped and compensated semiconductor were inspected.

Published in:

Advanced Semiconductor Devices and Microsystems, 2002. The Fourth International Conference on

Date of Conference:

14-16 Oct. 2002