UCSB's Jim Speck Recognized with Coveted Vannevar Bush Award for Insights into Gallium-Nitride LED Physics

Researchers at UCSB, led by Professors Speck and Weisbuch, have made significant strides in understanding efficiency losses in LEDs caused by a phenomenon known as Auger recombination, where electron-electron-hole interactions produce heat instead of light. Their pioneering work, which included the first direct measurements of “hot” electrons resulting from this non-radiative process using electro-emission spectroscopy, revealed discrepancies between theoretical predictions and experimental results. This unexpected finding has motivated Speck’s proposal for the Vannevar Bush Faculty Fellowship (VBFF), through which he aims to develop innovative techniques to directly measure the conduction band structure of semiconductors—information crucial for advancing high-voltage electronics. The VBFF, hailed as the Department of Defense’s premier award for fundamental research, underscores Speck’s commitment to uncovering the underlying mechanisms of semiconductor behavior, potentially leading to transformative advancements in various applications, including quantum technologies.

UCSB’s Jim Speck Recognized with Coveted Vannevar Bush Award for Insights into Gallium-Nitride LED Physics

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