Study on Electric Field Modulation and Avalanche Enhancement of SiC/GaN IMPATT Diode
Yang Dai,Jiangtao Dang,Qingsong Ye,Zhaoyang Lu,Shi Pu,Xiaoyi Lei,Shenglei Zhao,Yunyao Zhang,Chenguang Liao,Han Zhang,Wu Zhao +10 more
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TLDR
In this article, a 6H-materials silicon carbide (SiC)/gallium nitride (GaN) heterogeneous p-n structure was proposed to replace the GaN homogenous P-n junction to manufacture an impactionization-avalanche-transit-time (IMPATT) diode, and the performance of this 6HSiC/GaN heterojunction single-drift-region (SDR) IMPATT diode was simulated at frequencies above 100 GHz.Abstract:
This paper proposes a 6H-materials silicon carbide (SiC)/gallium nitride (GaN) heterogeneous p-n structure to replace the GaN homogenous p-n junction to manufacture an impact-ionization-avalanche-transit-time (IMPATT) diode, and the performance of this 6H-SiC/GaN heterojunction single-drift-region (SDR) IMPATT diode is simulated at frequencies above 100 GHz. The performance parameters of the studied device were simulated and compared with the conventional GaN p-n IMPATT diode. The results show that the p-SiC/n-GaN IMPATT performance is significantly improved, and this is reflected in the enhanced characteristics in terms of operating frequency, rf power, and dc-rf conversion efficiency by the two mechanisms. One such characteristic that the new structure has an excessive avalanche injection of electrons in the p-type SiC region owing to the ionization characteristics of the SiC material, while another is a lower electric field distribution in the drift region, which can induce a higher electron velocity and larger current in the structure. The work provides a reference to obtain a deeper understanding of the mechanism and design of IMPATT devices based on wide-bandgap semiconductor materials.read more
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Thin SiC and Gan-Based Films and Structures: Production and Properties
TL;DR: In this article , the authors describe the methods for producing thin films and structures based on SiC, GaN and their SiC-AlN and Al-GaN solid solutions, as well as mathematical models of film growth and properties-behavior of the I-V characteristics of heterostructures.
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