Numerical study of surface charge effects on a p-n junction model system: Modulation of junction potential, band diagrams, and recombinations

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We theoretically investigate the surface charge effects on a p-n junction model system. It is calculated that the polarity of the surface charges around the junction interface induces different variations in the built-in potential, which has been demonstrated to affect the band diagrams of p-n junction systems. That is, the more negative the surface charge is, the more the built-in potential decreases, and vice versa for positive surface charges in the system. These surface charges affect the modulation of three recombination processes, i.e. the Shockley-Read-Hall, band-to-band, and Auger recombination processes, and are numerically investigated with different surface charge densities imposed at the junction interface. As a result, it is calculated that the three recombination rates are reduced with increasing magnitudes of surface charge density due to the free carrier depletion that occurs around the p-n junction regions.
Publisher
TAYLOR & FRANCIS LTD
Issue Date
2016
Language
English
Article Type
Article
Keywords

OPEN-CIRCUIT VOLTAGE; LIGHT-EMITTING-DIODES; SOLAR-CELLS; PIEZO-PHOTOTRONICS; EFFICIENCY

Citation

INTEGRATED FERROELECTRICS, v.176, no.1, pp.118 - 125

ISSN
1058-4587
DOI
10.1080/10584587.2016.1249783
URI
http://hdl.handle.net/10203/220442
Appears in Collection
CH-Journal Papers(저널논문)
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