Wide Bandgap Semiconductor Based Solar-Blind Photodetectors

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D:Materials and Processing".

Deadline for manuscript submissions: closed (15 November 2021)

Special Issue Editors


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Guest Editor
Department Physics, University of Strathclyde, Glasgow G4 0NG, UK
Interests: wide-bandgap semiconductors; ultraviolet photodetectors; defects in semiconductors; microscopy of semiconductors

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Guest Editor
Department of Physics, University of Strathclyde, Glasgow, UK
Interests: wide bandgap semiconductors (especially III-nitrides); semiconductor spectroscopy; photovoltaic materials; nanostructures

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Guest Editor
Department of Physics, University of Strathclyde, Glasgow, UK
Interests: III-nitrides; luminescence spectroscopy; scanning electron microscopy

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Guest Editor
Beijing University of Posts and Telecommunications, Beijing, China
Interests: optoelectronics; wide bandgap semiconductors

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Guest Editor
School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, China
Interests: diamond; Ga2O3; photodetector

Special Issue Information

Dear Colleagues,

Wide bandgap semiconductors—including AlxGa1-xN, Ga2O3, BN, MgxZn1-xO, and diamond—have attracted increasing interest over the last decade both from academia and industry. These materials have given rise to numerous disruptive applications such as ultraviolet (UV) light emitting diodes, UV lasers, power rectifiers and power field effect transistors. In contrast, applications involving the detection of UV light have received much less attention. The recent emergence of new wide bandgap semiconductors such as Ga2O3 polymorphs has sparked renewed interest for UV sensing, in particular in the solar-blind region.

Accordingly, this Special Issue will showcase the latest advances in solar-blind photodetectors based on wide bandgap semiconductors and will cover aspects of material synthesis and device processing, structural and optoelectronic properties of photodetectors, material and device modelling, to name a few.

We look forward to receiving your submissions!


Dr. Fabien Massabuau
Prof. Dr. Robert W. Martin
Dr. Paul R. Edwards
Prof. Dr. Weihua Tang
Prof. Dr. Chong-Xin Shan
Guest Editors

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Keywords

  • Ultraviolet photodetectors
  • Wide bandgap semiconductors: AlxGa1-xN, Ga2O3, BN, MgxZn1-xO, Diamond

 

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Published Papers (1 paper)

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Research

11 pages, 6028 KiB  
Article
Ti Alloyed α-Ga2O3: Route towards Wide Band Gap Engineering
by Armin Barthel, Joseph Roberts, Mari Napari, Martin Frentrup, Tahmida Huq, András Kovács, Rachel Oliver, Paul Chalker, Timo Sajavaara and Fabien Massabuau
Micromachines 2020, 11(12), 1128; https://doi.org/10.3390/mi11121128 - 20 Dec 2020
Cited by 20 | Viewed by 5790
Abstract
The suitability of Ti as a band gap modifier for α-Ga2O3 was investigated, taking advantage of the isostructural α phases and high band gap difference between Ti2O3 and Ga2O3. Films of (Ti,Ga) [...] Read more.
The suitability of Ti as a band gap modifier for α-Ga2O3 was investigated, taking advantage of the isostructural α phases and high band gap difference between Ti2O3 and Ga2O3. Films of (Ti,Ga)2O3 were synthesized by atomic layer deposition on sapphire substrates, and characterized to determine how crystallinity and band gap vary with composition for this alloy. We report the deposition of high quality α-(TixGa1−x)2O3 films with x = 3.7%. For greater compositions the crystalline quality of the films degrades rapidly, where the corundum phase is maintained in films up to x = 5.3%, and films containing greater Ti fractions being amorphous. Over the range of achieved corundum phase films, that is 0% ≤ x ≤ 5.3%, the band gap energy varies by ∼270 meV. The ability to maintain a crystalline phase at low fractions of Ti, accompanied by a modification in band gap, shows promising prospects for band gap engineering and the development of wavelength specific solar-blind photodetectors based on α-Ga2O3. Full article
(This article belongs to the Special Issue Wide Bandgap Semiconductor Based Solar-Blind Photodetectors)
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