混合动力高功率AlGaN/CdZnO/GaN/AlGaN HEMT,具有高分断电压
Bonghwan Kim1, Seung-Hwan Park1
1Department of Semiconductor Electronic Engineering, Daegu Catholic University, Gyeongsan 38430, Gyeongbuk, Republic of Korea.
Materials (Basel, Switzerland)
|November 27, 2024
概括
这项研究探讨了在高电子流动性晶体管 (HEMT) 中用氧化 (CdZnO) 取代印化 (InGaN). 在高功率应用中,基于CdZnO的HEMT显示出有希望的更高的排水电流和故障电压.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
- 设备工程 设备工程
背景情况:
- 高电子移动性晶体管 (HEMT) 对高功率电子非常重要.
- /HEMT通常使用化 (InGaN) 作为通道层.
- 探索替代通道材料对于提高设备性能至关重要.
研究的目的:
- 在AlGaN/GaN HEMTs中用氧化 (CdZnO) 取代InGaN的影响.
- 分析基于CdZnO的HEMT的电气特性和故障电压.
- 评估这些新型HEMT对于高功率应用的适用性.
主要方法:
- 使用模拟分析将AlGaN/CdZnO/GaN/AlGaN/SiC HEMT结构与传统的AlGaN/InGaN/GaN/AlGaN/SiC HEMT进行比较.
- 屏障层中的 (Al) 含量变化,以观察对设备性能的影响.
- 评估了排水电流,传导率和故障电压.
主要成果:
- 这两种结构都显示出更高的排水电流和超导电量,含有更高的含量.
- 与同样含有Al的InGaN对应物相比,含有CdZnO的HEMT表现出更高的排水电流.
- 随着含量增加,分解电压下降,以CdZnO为基础的HEMT在较低的含量 (x=0.10) 中显示出略高的分解电压 (~795 V vs ~768 V).
结论:
- 对于HEMT通道层来说,CdZnO是InGaN的一个可行的替代品.
- 基于CdZnO的HEMT显示了增强的排水电流和可比的故障电压,表明了重要的潜力.
- 这些发现表明,基于CdZnO的HEMT在高功率,高频电子系统中具有有前途的应用.
更多相关视频
14:16Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy
Published on: October 23, 2018
7.6K
07:00Graphene-Assisted Quasi-van der Waals Epitaxy of AlN Film on Nano-Patterned Sapphire Substrate for Ultraviolet Light Emitting Diodes
Published on: June 25, 2020
7.1K
相关概念视频
Diode: Reverse bias
577
A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...
577
Modeling of Diode Reverse Characteristics
230
In electronic circuits, reverse-biased diode configurations are critical for regulating voltage levels. Zener diodes exploit the reverse breakdown phenomenon and exhibit a controlled breakdown at a specific Zener voltage (VZ). They are designed to maintain a constant voltage across their terminals and are commonly used for voltage regulation in circuits.
When a reverse voltage applied to a Zener diode exceeds its breakdown voltage, the diode enters the breakdown region. At this point, the...
When a reverse voltage applied to a Zener diode exceeds its breakdown voltage, the diode enters the breakdown region. At this point, the...
230
Zener Diodes
356
Zener diodes are specialized semiconductor devices designed to operate in the reverse breakdown region, where they allow current to flow into the cathode, making it positive relative to the anode. This reverse operation distinguishes Zener diodes from conventional diodes and enables their use in various applications, most notably as voltage regulators. One of the defining characteristics of Zener diodes is their nearly vertical I-V (current-voltage) characteristic curve above a certain...
356
Schottky Barrier Diode
297
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
297
MOSFET: Enhancement Mode
294
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
294
