Photoconductivity mechanism in structures with Ge-nanoclusters grown on Si(100) surface
Interband optical transitions in the epitaxial Si/Ge heterostructures with Ge nanoislands grown on Si(100) surface were investigated using photocurrent spectroscopy. The mechanism of photoconductivity was discussed. It was shown that electron transitions from the ground state of the valence band...
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| Date: | 2014 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2014
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| Series: | Semiconductor Physics Quantum Electronics & Optoelectronics |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Photoconductivity mechanism in structures with Ge-nanoclusters grown on Si(100) surface / Ye.Ye. Melnichuk, Yu.V. Hyrka, S.V. Kondratenko, Yu.N. Kozyrev, V.S. Lysenko // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2014. — Т. 17, № 4. — С. 331-335. — Бібліогр.: 10 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | Interband optical transitions in the epitaxial Si/Ge heterostructures with Ge
nanoislands grown on Si(100) surface were investigated using photocurrent
spectroscopy. The mechanism of photoconductivity was discussed. It was shown that
electron transitions from the ground state of the valence band in a quantum dot to the
conduction band of Si surrounding make the main contribution into monopolar
photoconductivity below the fundamental absorption edge of crystalline Si. Photoexcited
holes were found to be localized in Ge nanoislands inducing the lateral conductivity
changes in the near-surface depletion layer of p-Si substrate due to the field-effect. |
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