Thermal Management and Characterization of High-Power Wide-Bandgap Semiconductor Electronic and Photonic Devices in Automotive Applications

2019 ◽  
Vol 141 (2) ◽  
Author(s):  
Seung Kyu Oh ◽  
James Spencer Lundh ◽  
Shahab Shervin ◽  
Bikramjit Chatterjee ◽  
Dong Kyu Lee ◽  
...  
Keyword(s):  
Thermal Management ◽  
High Power ◽  
Critical Role ◽  
Management Strategies ◽  
Energy Conversion Efficiency ◽  
High Energy ◽  
Photonic Devices ◽  
Wide Bandgap ◽  
Automotive Applications ◽  
Wide Bandgap Semiconductor

GaN-based high-power wide-bandgap semiconductor electronics and photonics have been considered as promising candidates to replace conventional devices for automotive applications due to high energy conversion efficiency, ruggedness, and superior transient performance. However, performance and reliability are detrimentally impacted by significant heat generation in the device active area. Therefore, thermal management plays a critical role in the development of GaN-based high-power electronic and photonic devices. This paper presents a comprehensive review of the thermal management strategies for GaN-based lateral power/RF transistors and light-emitting diodes (LEDs) reported by researchers in both industry and academia. The review is divided into three parts: (1) a survey of thermal metrology techniques, including infrared thermography, Raman thermometry, and thermoreflectance thermal imaging, that have been applied to study GaN electronics and photonics; (2) practical thermal management solutions for GaN power electronics; and (3) packaging techniques and cooling systems for GaN LEDs used in automotive lighting applications.

Epitaxial growth of β-Ga2O3 (-201) thin film on fourfold symmetry CeO2 (001) substrate for heterogeneous integrations

2021 ◽  
Author(s):  
Xiao Tang ◽  
Kuanghui Li ◽  
Che-Hao Liao ◽  
Dongxing Zheng ◽  
chen Liu ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Epitaxial Growth ◽  
Gas Sensors ◽  
High Power ◽  
Wide Bandgap ◽  
Semiconductor Material ◽  
Uv Detectors ◽  
Wide Bandgap Semiconductor ◽  
Fourfold Symmetry

β-Ga2O3 is a wide bandgap semiconductor material promising for many fields such as gas sensors, UV detectors, and high power electronics. Until now, most epitaxial β-Ga2O3 thin films could only...

Innovative packaging solution for power and thermal management of wide-bandgap semiconductor devices in space applications

2008 ◽  
Vol 62 (6-7) ◽  
pp. 422-430 ◽  
Author(s):  
J. Barcena ◽  
J. Maudes ◽  
M. Vellvehi ◽  
X. Jorda ◽  
I. Obieta ◽  
...  
Keyword(s):  
Thermal Management ◽  
Semiconductor Devices ◽  
Wide Bandgap ◽  
Space Applications ◽  
Wide Bandgap Semiconductor

scholarly journals Ultrahigh thermal conductivity in isotope-enriched cubic boron nitride

Science ◽  
2020 ◽  
Vol 367 (6477) ◽  
pp. 555-559 ◽  
Author(s):  
Ke Chen ◽  
Bai Song ◽  
Navaneetha K. Ravichandran ◽  
Qiye Zheng ◽  
Xi Chen ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Thermal Management ◽  
High Power ◽  
Room Temperature ◽  
Cubic Boron Nitride ◽  
Wide Bandgap ◽  
Boron Isotopes ◽  
Fundamental Interest ◽  
Boron Phosphide

Materials with high thermal conductivity (κ) are of technological importance and fundamental interest. We grew cubic boron nitride (cBN) crystals with controlled abundance of boron isotopes and measured κ greater than 1600 watts per meter-kelvin at room temperature in samples with enriched 10B or 11B. In comparison, we found that the isotope enhancement of κ is considerably lower for boron phosphide and boron arsenide as the identical isotopic mass disorder becomes increasingly invisible to phonons. The ultrahigh κ in conjunction with its wide bandgap (6.2 electron volts) makes cBN a promising material for microelectronics thermal management, high-power electronics, and optoelectronics applications.

Thermal management strategies for high power semiconductor pump lasers

2006 ◽  
Vol 29 (2) ◽  
pp. 268-276 ◽  
Author(s):  
Xingsheng Liu ◽  
M.H. Hu ◽  
C.G. Caneau ◽  
R. Bhat ◽  
Chung-En Zah
Keyword(s):  
Thermal Management ◽  
High Power ◽  
Management Strategies ◽  
Power Semiconductor ◽  
Pump Lasers

scholarly journals Temperature, Ageing and Thermal Management of Lithium-Ion Batteries

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1248
Author(s):  
Lena Spitthoff ◽  
Paul R. Shearing ◽  
Odne Stokke Burheim
Keyword(s):  
Lithium Ion Batteries ◽  
Thermal Management ◽  
Critical Role ◽  
Experimental Studies ◽  
Lithium Ion ◽  
High Energy ◽  
Operating Conditions ◽  
Battery Lifetime ◽  
Temperature Ageing ◽  
And Performance

Heat generation and therefore thermal transport plays a critical role in ensuring performance, ageing and safety for lithium-ion batteries (LIB). Increased battery temperature is the most important ageing accelerator. Understanding and managing temperature and ageing for batteries in operation is thus a multiscale challenge, ranging from the micro/nanoscale within the single material layers to large, integrated LIB packs. This paper includes an extended literature survey of experimental studies on commercial cells investigating the capacity and performance degradation of LIB. It compares the degradation behavior in terms of the influence of operating conditions for different chemistries and cell sizes. A simple thermal model for linking some of these parameters together is presented as well. While the temperature appears to have a large impact on ageing acceleration above room temperature during cycling for all studied cells, the effect of SOC and C rate appear to be rather cell dependent.Through the application of new simulations, it is shown that during cell testing, the actual cell temperature can deviate severely from the reported temperature depending on the thermal management during testing and C rate. It is shown, that the battery lifetime reduction at high C rates can be for large parts due to an increase in temperature especially for high energy cells and poor cooling during cycling studies. Measuring and reporting the actual battery (surface) temperature allow for a proper interpretation of results and transferring results from laboratory experiments to real applications.

scholarly journals Characteristics and optimization of SCO2 Brayton cycle system for high power sodium-cooled fast reactor on Mars

2021 ◽  
Vol 25 (6 Part B) ◽  
pp. 4659-4666
Author(s):  
Hao-Chun Zhang ◽  
Xiu-Ting Liu ◽  
Jin Liu ◽  
Zeng-En Li
Keyword(s):  
Fast Reactor ◽  
High Power ◽  
Pressure Ratio ◽  
Energy System ◽  
Energy Conversion Efficiency ◽  
High Energy ◽  
Inlet Temperature ◽  
Brayton Cycle ◽  
Cycle System ◽  
The Relationship

Mars is the target of deep space exploration. The first problem of landing on Mars and building a satellite base is the energy source. For more than 50 kW high power demand, space nuclear energy system has the advantages of high output power, large energy density, small area, short working time and so on. Super-critical CO2 Brayton cycle with sodium cooled fast reactor is the most promising power solution because of the high energy conversion efficiency. The thermodynamic model of super-critical CO2 Brayton cycle system with sodium cooled fast reactor as the heat source has been established. After the analysis of circulation process, the relationship between temperature, pressure and enthalpy at working point has been discussed, and the relationship of circulation efficiency has been deduced. The real gas model is used to correct the thermophysical properties of super-critical CO2. The thermal efficiency of the system is analyzed under the typical working condition of Mars surface. What?s more, the effects of pressure ratio, compressor inlet temperature, turbine inlet temperature, and the temperature ratio on the cycle efficiency are discussed to get the optimal cycle characteristic and condition parameters.

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