Abstract
We report the fabrication and optical and electrical characterization of photodetectors for the UV spectral range based on single p–n junction nanowires with a transparent contact of a new type. The contact is based on CVD-grown (chemical-vapor deposition) graphene. The active region of the nitride nanowires contains a set of 30 radial In0.18Ga0.82N/GaN quantum wells. The structure is grown by metal-organic vaporphase epitaxy. The photodetectors are fabricated using electron-beam lithography. The current–voltage characteristics exhibit a rectifying behavior. The spectral sensitivity of the photodetector is recorded starting from 3 eV and extending far in the UV range. The maximal photoresponse is observed at a wavelength of 367 nm (sensitivity 1.9 mA/W). The response switching time of the photodetector is less than 0.1 s.
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Original Russian Text © A.V. Babichev, H. Zhang, N. Guan, A.Yu. Egorov, F.H. Julien, A. Messanvi, C. Durand, J. Eymery, M. Tchernycheva, 2016, published in Fizika i Tekhnika Poluprovodnikov, 2016, Vol. 50, No. 8, pp. 1118–1122.
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Babichev, A.V., Zhang, H., Guan, N. et al. Optical properties of photodetectors based on single GaN nanowires with a transparent graphene contact. Semiconductors 50, 1097–1101 (2016). https://doi.org/10.1134/S106378261608008X
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DOI: https://doi.org/10.1134/S106378261608008X