Photovoltaic effect in unipolar multivalley semiconductors
| Autor: | Yu. G. Gurevich, O. Yu. Titov, I. N. Volovichev |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Condensed matter physics Electromotive force Ambipolar diffusion Chemistry business.industry 02 engineering and technology Electron Photovoltaic effect 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Condensed Matter::Materials Science Light intensity Surface conductivity Semiconductor 0103 physical sciences Charge carrier 0210 nano-technology business |
| Zdroj: | Philosophical Magazine. 97:683-692 |
| ISSN: | 1478-6443 1478-6435 |
| DOI: | 10.1080/14786435.2016.1274838 |
| Popis: | The theory of the nonequilibrium charge carrier transport in unipolar multivalley semiconductors is developed. It is shown that the diffusion of photoexcited nonequilibrium heavy and light electrons in multivalley semiconductors is a correlated process, like the ambipolar diffusion in the case of the electron-hole plasma. The light-induced intervalley transitions, resulting in the imbalance between the subsystems of the light and heavy electrons, give rise to the electromotive force (emf) through the mechanism of the Dember photovoltaic effect. The value of the emf occurring in the ‘metal-semiconductor-metal’ structure is calculated in the linear approximation in terms of the light intensity as a small parameter. It is shown that the emf is determined by the conductivity of heavy and light electron subsystems, as well as by the surface conductivity of the metal-semiconductor interface. |
| Databáze: | OpenAIRE |
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