journal article·2017-12-01Open access

High-resistivity unintentionally carbon-doped GaN layers with nitrogen as nucleation layer carrier gas grown by metal-organic chemical vapor deposition

Fu Chen, Shichuang Sun, Xuguang Deng, Kai Fu, Guohao Yu, Liang Song, Ronghui Hao, Yaming Fan, Yong Cai, Baoshun Zhang

AIP Advances· Volume 7· Issue 12

Abstract

In this letter, high-resistivity unintentionally carbon-doped GaN layers with sheet resistivity greater than 106 Ω/□ have been grown on c-plane sapphire substrates by metal-organic chemical vapor deposition (MOCVD). We have observed that the growth of GaN nucleation layers (NLs) under N2 ambient leads to a large full width at half maximum (FWHM) of (102) X-ray diffraction (XRD) line in the rocking curve about 1576 arc sec. Unintentional carbon incorporation can be observed in the secondary ion mass spectroscopy (SIMS) measurements. The results demonstrate the self-compensation mechanism is attributed to the increased density of edge-type threading dislocations and carbon impurities. The AlGaN/GaN HEMT grown on the high-resistivity GaN template has also been fabricated, exhibiting a maximum drain current of 478 mA/mm, a peak transconductance of 60.0 mS/mm, an ON/OFF ratio of 0.96×108 and a breakdown voltage of 621 V.
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Research context

OpenAlex topics: GaN-based semiconductor devices and materials · Semiconductor materials and devices · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS 1 , Suzhou 215123, China

University of Chinese Academy of Sciences 2 , Beijing 100049, China

School of Nano Technology and Nano Bionics, University of Science and Technology of China 3 , Suzhou 215123, China

School of Materials Science and Engineering, Nanjing University of Science and Technology 4 , Nanjing 210094, China

Suzhou Powerhouse Electronics Co., Ltd 5 , Suzhou 215123, China

Funding

The Key Research and Development Program of Jiangsu Province · The National Key Research and Development Program of China · The National Key Scientific Instrument and Equipment Development Projects of China

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