Journal article
Electron cloud effect on current injection across a Schottky contact
Applied physics letters, v 77(24), pp 4007-4009
11 Dec 2000
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Abstract
The electron cloud that is formed in the narrow gap material in a modulation-doped heterostructure affects the Schottky contact made to the wide gap material. It also influences absorption and collection of the optically generated carriers. Photocurrent spectra, current-voltage, and current-temperature measurements show that the increase in electron cloud density decreases dark current flow while increasing photoresponsivity. We propose that the Coulombic interaction between the confined electron cloud and the emitted electrons from metal to the wide gap material increases the barrier height. The electric field in the direction of growth due to modulation doping accounts for the increase in photoelectron collection efficiency. Implementation of this effect increases efficiency of photodetectors while, simultaneously, reducing the noise due to dark current. (C) 2000 American Institute of Physics. [S0003-6951(00)00952-9].
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Details
- Title
- Electron cloud effect on current injection across a Schottky contact
- Creators
- B NabetA ColaF QuarantaM CesareoR RossiR FucciA Anwar
- Publication Details
- Applied physics letters, v 77(24), pp 4007-4009
- Publisher
- American Institute of Physics
- Number of pages
- 3
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000165690400043
- Scopus ID
- 2-s2.0-0011733110
- Other Identifier
- 991019168448704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Applied