Semi-insulating BAs and BP Composite as Heat Spreaders for Power Electronic Devices
Abstract
Short Work Statement: -1) identify routes to synthesize semi-insulating BAs and BP materials with high resistivity to maximize electrical isolation, while hopefully maintaining their high thermal conductivity during the extrinsic doping studies to heat spreader applications; 2) develop cost effective methods to synthesize BAs- or BP-based composite thin films as both insulating heat spreaders or intermediate heat sinks for power electronics.Abstract:The hot spot heat dissipation and associated thermal management in high power electronics and optoelectronic devices will become critical bottleneck for their performance and reliability. Recently, ultrahigh thermal conductivities in cubic boron arsenide (BAs) and boron phosphide (BP), with values above > 1000 W m-1 K-1and >500 W m-1 K-1 respectively, have been experimentally verified by us and others. Their compatible coefficient of thermal expansion (CTE)with that of Si and GaN, relatively smaller lattice mismatch with semiconducting devices, and their chemical inertness, have placed BAs/BP as ideal candidates for heat spreader applications in power electronics thermal management. To fully facilitate such heat spreader application, the semiinsulating behavior is required for the BAs and BP materials. This proposal will provide the timelyexperimental efforts to work towards to growth of bulk semi-insulating BAs and BP high quality single crystals. The objectives of the proposed project are focused on two main tasks: 1) to develop synthetic routes and identify proper dopants/concentration to synthesize high quality semiinsulating BAs and BP crystals with high electrical resistivity; 2) to develop BAs and BP composite embedded with other matrices with high thermal conductivity for heat spreaderapplications in power electronic devices. The proposed work will make a significant technological impact to help address the increasingly serious heat dissipation issues in high performance electronics and optoelectronics, provide the necessary fundamental research for enabling scientific progress and breakthroughs in shipboard and expeditionary power & energy technology to power the Navy equipment of the future, and meet the mission of the Office of Naval Research (ONR) for ~enabling higher power density electronic systems associated with Advanced Naval Power Systems~. The project will actively involves undergraduate training, extensive science education and outreach programs to enhance interest of K-12 students and the general public in science as well.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 23, 2019
- Source ID
- N000141912061
Entities
People
- Bing Lv
Organizations
- Office of Naval Research
- United States Navy
- University of Texas at Dallas