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GaN-based semiconductor devices and materials
Research Guide
What is GaN-based semiconductor devices and materials?
GaN-based semiconductor devices and materials are electronic components and compound semiconductors composed primarily of gallium nitride (GaN) and its alloys such as AlGaN and InGaN, utilized for high-power, high-frequency, and optoelectronic applications due to their wide bandgaps and high electron mobilities.
The field encompasses 123,273 published works on GaN and related III-nitride materials. Nakamura et al. (1994) reported candela-class InGaN/AlGaN double-heterostructure blue LEDs with luminous intensity over 1 cd and output power of 1500 μW. Ambacher et al. (1999) analyzed two-dimensional electron gases in AlGaN/GaN heterostructures driven by spontaneous and piezoelectric polarization.
Research Sub-Topics
GaN High Electron Mobility Transistors
This sub-topic covers the design, fabrication, and optimization of AlGaN/GaN heterostructure transistors leveraging 2DEG for high-power RF and power switching applications. Researchers study gate reliability, thermal management, and breakdown mechanisms to enhance performance.
III-Nitride Light Emitting Diodes
This sub-topic focuses on InGaN/GaN quantum well LEDs for visible and UV emission, including epitaxial growth, efficiency droop mitigation, and phosphor-free white light generation. Researchers investigate carrier dynamics and defect reduction for higher brightness and longevity.
Defects and Impurities in GaN
This sub-topic examines point defects, dislocations, and dopants in GaN materials using first-principles calculations and experimental characterization. Researchers study their impact on optical and electrical properties to improve material quality.
Polarization Effects in III-Nitrides
This sub-topic explores spontaneous and piezoelectric polarization in wurtzite III-nitrides, affecting 2DEG formation and quantum-confined Stark effect in heterostructures. Researchers model polarization-induced fields for device optimization.
Epitaxial Growth of GaN
This sub-topic covers MOCVD, MBE, and HVPE techniques for GaN layers on sapphire, SiC, and native substrates, focusing on strain management and buffer layers. Researchers address threading dislocation reduction and scalability.
Why It Matters
GaN-based devices enable high-efficiency power conversion and RF amplification, surpassing silicon counterparts in performance. Nakamura et al. (1994) demonstrated blue LEDs with external quantum efficiency suitable for displays and lighting, foundational to modern white LEDs. Recent developments include onsemi's collaboration with GlobalFoundries for 650V GaN power devices and Vertical Semiconductor's $11 million funding for vertical GaN transistors. Preprints highlight GaN power devices with improved switching speed and reliability for high-efficiency systems, as in "GaN-based power devices: Physics, reliability, and perspectives" (2025). Alpsemi disclosed high-voltage HEMT epitaxial structures for advanced power conversion.
Reading Guide
Where to Start
"GaN, AlN, and InN: A review" by Strite and Morkoç (1992), as it provides a foundational overview of crystal growth techniques, structural, optical, and electrical properties of III-nitrides and their alloys.
Key Papers Explained
Strite and Morkoç (1992) establish baseline properties of GaN materials in "GaN, AlN, and InN: A review". Nakamura et al. (1994) advance optoelectronics with "Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes", achieving 1 cd intensity. Bernardini et al. (1997) quantify polarization in "Spontaneous polarization and piezoelectric constants of III-V nitrides", explaining Ambacher et al. (1999)'s 2DEG formation in "Two-dimensional electron gases induced by spontaneous and piezoelectric polarization charges in N- and Ga-face AlGaN/GaN heterostructures".
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Preprints emphasize GaN power devices, with "GaN-based power devices: Physics, reliability, and perspectives" (2025) and "A Comprehensive Study on GaN Power Devices: Reliability, Performance, and Application Perspectives" (2025) addressing switching speed and gate-driving. News covers onsemi-GlobalFoundries 650V devices and Alpsemi HEMT structures. Special issues on GaN power devices appear in Semiconductor Science and Technology (2026).
Papers at a Glance
In the News
Atomera's GaN-on-Silicon Concept Advances to Proposal ...
Approval at the proposal stage would make the project eligible for funding from PowerAmerica, enabling Atomera to further refine and scale GaN-on-Si manufacturing with MST. This approach targets im...
onsemi to Develop Next-Generation GaN Power Devices with ...
onsemi expands its leadership in intelligent power through a new collaboration agreement withGlobalFoundries(GF) to develop and manufacture next-generation gallium nitride (GaN) power devices, begi...
Global IP dynamics highlight surging GaN innovation ...
* Alpsemi (in France) disclosed a high-voltage high-electron-mobility transistor (HEMT) epitaxial structure dedicated to advanced power conversion;
Vertical Semiconductor raises $11m for development of ...
Chip startup Vertical Semiconductor has raised $11 million in a seed funding round to support the development of its vertical GaN (gallium nitride) transistors.
Q3 2025 GaN Patent Monitor Now Available
* **Alpsemi (France)**disclosed a high-voltage**HEMT epitaxial structure**dedicated to advanced power conversion. * **SK Foundry**introduced a**GaN transistor structure**designed to mitigate curren...
Code & Tools
GNU archimedes is free software. See the file COPYING for copying conditions. ``` ## About Fork of GNU Archimedes to add support for III-Nitride...
image GaN based 1-MHz Dual Active Bridge Converter MATERIALS AND METHODS We are using Simulink to simulate and demonstrate this project.
An open source drift diffusion code based in MATLAB for simulating semiconductor devices with mixed ionic-electronic conducting materials. ### Lic...
Here are 1D, 2D, and 3D models which solve the semiconductor Poisson-Drift-Diffusion equations using finite-differences. These models can be used t...
**Solcore**was born as a modular set of tools, written (almost) entirely in Python 3, to address some of the task we had to solve more. With time, ...
Recent Preprints
GaN-based power devices: Physics, reliability, and perspectives
Over the past decade, gallium nitride has emerged as an excellent material for the fabrication of power semiconductor devices. Thanks to the unique properties of GaN, diodes and transistors based...
A Comprehensive Study on GaN Power Devices: Reliability, Performance, and Application Perspectives
This review examines recent advances in Gallium Nitride (GaN) power semiconductor devices and their growing impact on the development of high-efficiency power conversion systems. It explores innova...
High power density gallium nitride radio frequency transistors via enhanced nucleation in heteroepitaxy
## References 1. Mishra, U. K., Shen, L. K., Kazior, T. E. & Wu, Y. F. GaN-based RF power devices and amplifiers.*Proc. IEEE***96**, 287–305 (2008). Google Scholar 2. Trew, R. J., Billro, G. L., ...
Semiconductor Science and Technology - IOPscience
Ultra-doped SemiconductorsSpecial Issue on Defects in Semiconductor Materials and DevicesSpecial Issue on GaN Power DevicesSpecial Issue on Neuromorphic Devices and ApplicationsSpecial Issue on Nan...
Design and analysis of a GaN-based 2D photonic crystal ...
GaN is a direct band gap semiconductor which can provide efficient light transmission 57 . Although GaN is used for making light emitting diodes and lasers, it can also be used in photonic crystal ...
Latest Developments
Recent developments in GaN-based semiconductor devices and materials research as of February 2026 include significant market growth, with the GaN semiconductor device market valued at approximately $23.16 billion in 2025 and projected to reach $39.84 billion by 2035 (InsightAce). Technological advances have led to record-high efficiencies, such as Fujitsu's GaN HEMT achieving 85.2% PAE at 2.45 GHz (Semiconductor Today), and progress in power device integration and high-frequency applications (ADS). The market is driven by applications in power electronics, RF systems, and high-efficiency power conversion, with ongoing research into novel device architectures like heterojunction FETs and multichannel GaN devices (Nature, Nature Electronics).
Sources
Frequently Asked Questions
What enabled high-brightness blue LEDs in GaN materials?
Nakamura, Mukai, and Senoh (1994) fabricated InGaN/AlGaN double-heterostructure blue LEDs using a Zn-doped InGaN active layer, achieving luminous intensity over 1 cd and typical output power of 1500 μW. The external quantum efficiency supported candela-class brightness. These devices marked a key advance in III-nitride optoelectronics.
How do polarization effects contribute to GaN heterostructures?
Ambacher et al. (1999) showed that spontaneous and piezoelectric polarization in Ga-face AlGaN/GaN heterostructures induce high-density two-dimensional electron gases for field-effect transistors. Carrier concentration profiles were measured in wurtzite structures. N-face structures exhibited different distributions.
What are the piezoelectric properties of III-nitrides?
Bernardini, Fiorentini, and Vanderbilt (1997) calculated spontaneous polarization and piezoelectric constants for AlN, GaN, and InN using the Berry phase approach. Piezoelectric constants are up to 10 times larger than in conventional III-V semiconductors. These values influence heterostructure device performance.
What defects are studied in III-nitrides?
Van de Walle and Neugebauer (2004) applied first-principles calculations to predict structures and energies of defects and impurities in III-nitrides. The methodology supports materials design and explains experimental observations. It extends to predicting new properties.
What applications do GaN materials support?
Strite and Morkoç (1992) reviewed GaN, AlN, and InN for crystal growth, structural, optical, and electrical properties in optoelectronics and high-power devices. Morkoç et al. (1994) compared GaN with SiC and ZnSe for high-temperature electronics and short-wavelength optics. Recent preprints focus on power device reliability.
Open Research Questions
- ? How can current collapse be fully mitigated in GaN transistor structures, as referenced in recent patent disclosures?
- ? What limits the scaling of vertical GaN transistors for higher voltage applications?
- ? How do defects influence long-term reliability in GaN power devices under high-field operation?
- ? What epitaxial improvements enable higher power density in GaN RF transistors?
- ? How can polarization-induced effects be engineered for next-generation AlGaN/GaN heterostructures?
Recent Trends
GaN power devices dominate recent preprints, including "GaN-based power devices: Physics, reliability, and perspectives" and "High power density gallium nitride radio frequency transistors via enhanced nucleation in heteroepitaxy" (2025).
2025News reports onsemi's 650V GaN collaboration with GlobalFoundries , Vertical Semiconductor's $11m for vertical GaN transistors (2025), and Alpsemi's high-voltage HEMT structures.
2025Q3 2025 GaN Patent Monitor notes SK Foundry's current collapse mitigation.
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