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- Zhang, Guobin, et al.
(författare)
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Thermal Analysis of AlGaN/GaN High-Electron-Mobility Transistors with Graphene
- 2018
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Ingår i: Journal of Nanoscience and Nanotechnology. - : American Scientific Publishers. - 1533-4880 .- 1533-4899. ; 18:11, s. 7578-7583
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Tidskriftsartikel (refereegranskat)abstract
- A thermal analysis of AlGaN/GaN high electron mobility transistors (HEMTs) with Graphene is investigated using Silvaco and Finite Element Method. Two thermal management solutions are adopted; first of all, graphene is used as dissipation material between SiC substrate and GaN buffer layer to reduce thermal boundary resistance of the device. At the same time, graphene is also used as a thermal spread material on the top of the source contacts to reduce thermal resistance of the device. The thermal analysis results show that the temperature rise of device adopting graphene decreases by 46.5% in transistors operating at 13.86 W/mm. Meanwhile, the thermal resistance of GaN HEMTs with graphene is 6.8 K/W, which is much lower than the device without graphene, which is 18.5 K/W. The thermal management solutions are useful for integration of large-scale graphene into practical devices for effective heat spreading in AlGaN/GaN HEMT.
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| 2. |
- Xia, Tianwen, et al.
(författare)
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Comparison of GaN LED Optical Simulation in 2D and 3D Space Based on k-Domain Analysis Method
- 2024
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Ingår i: IEEE Journal of Quantum Electronics. - 0018-9197 .- 1558-1713. ; 60:3
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Tidskriftsartikel (refereegranskat)abstract
- Earlier researchers have designed nanostructures such as stripe gratings (SG) or photonic crystals array (PhCA) to improve the light extraction efficiency (LEE) of light-emitting diodes (LEDs) by the diffraction mechanism. However, through k-domain method and simulation analysis, this letter finds that although SG perform well in 2D simulation, their effect drops sharply in 3D space, a phenomenon being overlooked in the community. This letter explains the diffraction mechanism of LEDs with nanostructure in 2D and 3D space through K-domain analysis, and reveals the inaccuracy of simulating LED with SG in 2D space. Unlike SG, PhCA offers diffraction in two directions and may be more suitable for LEDs.
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