کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5400993 | 1505924 | 2013 | 4 صفحه PDF | دانلود رایگان |

We have investigated the influence of 7-MeV electron irradiation (1.2Ã1015 and 1.8Ã1016 electrons/cmâ2 doses) and subsequent rapid thermal annealing (RTA) on luminescence efficiency of nearly lattice-matched 1-eV GaInNAs-on-GaAs thin epilayers, grown by molecular beam epitaxy. The study has been done by means of 9 K photoluminescence (PL) in conjunction with 300 K photoreflectance (PR) spectroscopy and x-ray diffraction (XRD) measurements. An enhancement in PL has been found for the lower dose whereas a drastic deterioration in PL has been seen for the higher dose. When rapid thermally annealed at 800 °C for 1 min an enhancement in PL has been observed, noticeably for the sample irradiated at a higher dose, as compared to the reference non-irradiated sample. The irradiation-promoted enhancement in PL upon annealing has been accompanied by a small additional blue shift (BS) of the PL. This additional annealing-induced BS has been found, by PR and XRD, to be due to an irradiation-promoted enhancement in In-N bonds formation, whose magnitude appears to not depend on dose within the studied range.
⺠Photoluminescence intensity from GaInNAs directly increased upon 7-MeV electron irradiation. ⺠Photoluminescence enhancement on annealing is promoted by 7-MeV electron irradiation in GaInNAs. ⺠7-MeV electron irradiation enhances formation of In-N bonds in GaInNAs subject to annealing.
Journal: Journal of Luminescence - Volume 136, April 2013, Pages 347-350