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Proceedings Paper

Bipolar charge transport in triple-barrier AlAs/GaAs resonant tunneling light-emitting diodes
Author(s): Chris A. Van Hoof; Jan Genoe; Sylvain Raymond; Gustaaf Borghs; Z. Yan; Etienne Goovaerts
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Paper Abstract

The quantum-well emission originating from triple-barrier AlAs/GaAs resonant tunneling light emitting diodes has been investigated. In these devices, three barriers defined two asymmetric quantum wells. Two nominally identical structures were grown that had a different sequence of the two quantum wells. Depending on which well was the first well for the electron tunneling transport, double or triple resonances were observed. In the latter case, the two- dimensional accumulation layer is aligned with the subbands from both wells. The subband occupation and the charge distribution between the two wells is studied, showing that at any resonance the wider of the two wells will emit more luminescence but at a double resonance the narrower well can be the stronger light emitter. Bandstructure calculations under all bias conditions further confirm the occurrence of both kinds of resonances in these triple-barrier structures.

Paper Details

Date Published: 11 May 1994
PDF: 8 pages
Proc. SPIE 2139, Quantum Well and Superlattice Physics V, (11 May 1994); doi: 10.1117/12.175721
Show Author Affiliations
Chris A. Van Hoof, Interuniv. Micro-Elektronica Centrum (Belgium)
Jan Genoe, Interuniv. Micro-Elektronica Centrum (Belgium)
Sylvain Raymond, Interuniv. Micro-Elektronica Centrum (Belgium)
Gustaaf Borghs, Interuniv. Micro-Elektronica Centrum (Belgium)
Z. Yan, Univ. of Antwerp (Belgium)
Etienne Goovaerts, Univ. of Antwerp (Belgium)


Published in SPIE Proceedings Vol. 2139:
Quantum Well and Superlattice Physics V
Gottfried H. Doehler; Emil S. Koteles, Editor(s)

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