PITTSBURGH — W. James “Jim” Choyke, a distinguished professor emeritus of physics at the University of Pittsburgh whose pioneering research helped pave the way for modern power electronics, has passed away at the age of 98.
Over a legendary career spanning more than six decades across industrial research and academia, Dr. Choyke established himself as an international authority on the optical properties of semiconductors, most notably silicon carbide (SiC).
A Legacy of Innovation in Semiconductor Physics
Dr. Choyke’s groundbreaking work on wide-bandgap semiconductors laid the essential groundwork for high-efficiency electronics used globally today—including power grids, electric vehicles, and high-frequency communication systems.
After spending 30 years as a lead research physicist at the Westinghouse Research Laboratories in Churchill, Pennsylvania, he joined the faculty at the University of Pittsburgh Department of Physics and Astronomy in 1983, where he mentored generations of graduate students and experimental physicists.
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Silicon Carbide Pioneer: His fundamental studies into the luminescence, radiation damage, and band structure of silicon carbide turned a previously difficult material into a cornerstone of modern green-energy technology.
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Prolific Academic Impact: Author of over 300 peer-reviewed scientific papers and editor of foundational reference textbooks on wide-bandgap semiconductors.
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Dedicated Mentor: Taught and guided researchers for over 35 years at Pitt, establishing collaborative international networks with laboratories across Europe, Asia, and North America.
Dr. W. James Choyke Professional Milestones:
• Primary Focus: Optical properties of semiconductors, Silicon Carbide (SiC) physics
• Industrial Tenure: 30 years at Westinghouse Research Laboratories
• Academic Tenure: Professor & Professor Emeritus at University of Pittsburgh (1983–2020s)
• Honors: Fellow of the American Physical Society (APS), international lifetime achievement awards in SiC research
Impact on Pittsburgh’s Scientific and Educational Community
Beyond his laboratory achievements, Dr. Choyke was celebrated by colleagues and students for his enthusiasm, hands-on teaching style, and dedication to fostering scientific curiosity.
Key Contributions to the Field
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Advancing Green Energy Infrastructure: His early physical measurements of silicon carbide enabled industrial developers to design ultra-efficient power chips that reduce energy loss in solar converters and electric car drivetrains.
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Building World-Class Optics Labs: At Pitt, he built specialized low-temperature luminescence facilities that attracted visiting scientists and doctoral candidates from across the world.
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Enduring Academic Legacy: The Pitt Department of Physics and Astronomy continues to benefit from the analytical methods and laboratory standards established during his decades of leadership.
Remembering Dr. Jim Choyke
Dr. Choyke is survived by his family, former colleagues, and a global network of researchers carrying forward his work in physics and materials science.
Colleagues and alumni interested in memorial details or honoring his legacy can find further information through the University of Pittsburgh Department of Physics and Astronomy.
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