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A theoretical and experimental evaluation of III–nitride solar-blind UV photocathode

Lookup NU author(s): Dr Jose LiuORCiD

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Abstract

© 2017 Chinese Physical Society and IOP Publishing Ltd. We have developed a superior solar-blind ultraviolet (UV) photocathode with an AlxGa1-xN photocathode (x ∼ 0.45) in semi-transparent mode, and assessed spectra radiant sensitivity related to practical use. Before being grown over a basal plane sapphire substrate by low-pressure metal organic chemical vapor deposition (MOCVD), a reasonable design was made to the photocathode epitaxy structure, focusing on the AlxGa1-xN: Mg active layer, then followed by a comprehensive analysis of the structural and optical characterization. The spectra radiant sensitivity is peaked of 41.395 mA/W at wavelength 257 nm and then decreases by about 3 to 4 decades at 400 nm demonstrating the ability of this photocathode for solar-blind application prospects.

Publication metadata

Author(s): Ren B, Guo H, Shi F, Cheng H-C, Liu H, Liu J, Shen Z-H, Shi Y-L, Liu P

Publication type: Article

Publication status: Published

Journal: Chinese Physics B

Year: 2017

Volume: 26

Issue: 8

Online publication date: 20/06/2017

Acceptance date: 02/04/2016

ISSN (print): 1674-1056

ISSN (electronic): 2058-3834

Publisher: Institute of Physics Publishing

URL: https://doi.org/10.1088/1674-1056/26/8/088504

DOI: 10.1088/1674-1056/26/8/088504

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