Optical properties of epitaxially grown GaN:Ge thin films

被引：0

作者：

Buryi M. ^{[1
]}

Babin V. ^{[1
]}

Hubáček T. ^{[1
]}

Jarý V. ^{[1
]}

Hájek F. ^{[1
,2
]}

Kuldová K. ^{[1
]}

Remeš Z. ^{[1
]}

Hospodková A. ^{[1
]}

机构：

[1] Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10/112, Prague 6

[2] Faculty of Nuclear Sciences and Physical Engineering, The Czech Technical University, Břehová 7, Prague

来源：

Optical Materials: X | 2022年 / 16卷

关键词：

GaN; Ge doping; Luminescence; Thin films;

D O I：

10.1016/j.omx.2022.100211

中图分类号：

学科分类号：

摘要：

To better understand the scintillation properties of gallium nitride, a detailed characterization of Metal Organic Vapour Phase Epitaxy (MOVPE) grown GaN layers doped with Ge is conducted. This study includes the measurements of radioluminescence and photoluminescence spectra, thermally stimulated luminescence as well as scintillation decay kinetics. The representative radio- and photoluminescence spectra are composed of two bands. The narrow and fast band peaking at about 3.4 eV is ascribed to excitons and the broad and slow defect-related band with the maximum at about 2.2 eV is produced by carbon occupying nitrogen site. It has been found that the decay kinetics and amplitude of the exciton and defect emission are sensitive to the Ge doping level. In particular, the exciton- and the defect-related luminescence become faster with increasing Ge content. Charge trapping processes were also affected by the Ge doping. © 2022 The Author(s)

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