Qian, H., Lee, K.B., Hosseini Vajargah, S. et al. (7 more authors) (2016) Characterization of p-GaN1-xAsx/n-GaN PN junction diodes. Semiconductor Science and Technology, 31 (6). 065020. ISSN 0268-1242
Abstract
The structural properties and electrical conduction mechanisms of p-type amorphous GaN1−x As x /n-type crystalline GaN PN junction diodes are presented. A hole concentration of 8.5 × 1019 cm−3 is achieved which allows a specific contact resistance of 1.3 × 10−4 Ω cm2. An increased gallium beam equivalent pressure during growth produces reduced resistivity but can result in the formation of a polycrystalline structure. The conduction mechanism is found to be influenced by the crystallinity of the structure. Temperature dependent current voltage characteristics at low forward bias (<0.35 V) show that conduction is recombination dominated in the amorphous structure whereas a transition from tunneling to recombination is observed in the polycrystalline structure. At higher bias, the currents are space charge limited due to the low carrier density in the n-type region. In reverse bias, tunneling current dominates at low bias (<0.3 V) and recombination current becomes dominant at higher reverse bias.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 IOP Publishing. This is an author produced version of a paper subsequently published in Semiconductor Science and Technology. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | GaN; PN diode; conduction mechanism; p-type doping; amorphous GaNAs |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 02 Jun 2016 15:06 |
Last Modified: | 10 May 2017 00:38 |
Published Version: | https://dx.doi.org/10.1088/0268-1242/31/6/065020 |
Status: | Published |
Publisher: | IOP Publishing |
Identification Number: | 10.1088/0268-1242/31/6/065020 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:100251 |