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1818-331X (Print), 2074-0565 (Online) |
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Some radiation effects in quantum-size À3Â5 and À2Â6 structures, grown on semiinsulating GaAs
Ye. Yu. Braylovsky, G. N. Semenova, Yu. G. Sadofyev, N. Ye. Êorsunskaya, Ì. P. Semtsiv, Ì. B. Sharibaev
Institute for Nuclear Research of the National Academy of Sciences of Ukraine, Kyiv, UkraineAbstract: The effect of electron (Å=1.8 ÌåV), 60Ñî γ-quanta and X-ray irradiation (Å≤100 êåV) on the photoluminescence, PL, and optical reflection of the GaAs/GaAlAs ³ CdZnTe/ZnTe quantum-size structures was investigated. The quantum wells, QWs, of the À3Â5 structures were grown by the ÌÎÑVD-technique, the QWs of the À2Â6 structures were grown by the ÌBE method on the semiinsulating, SI, GaAs substrates. The high radiation hardness of A3B5 QWs after irradiation up to dose of 2·109 rad was found, while SI GaAs substrates manifested characteristics degradation under such irradiation dose. À2Â6 QWs tends to degrade under sufficiently lower irradiation dose. The well profile change was calculated from PL peak energy shift. The role of Ñd diffusion and internal strain in radiation enhanced quantum-size structures degradation is discussed.
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