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Joachim Piprek
Founder and President
NUSOD Institute LLC
P.O. Box 7204
Newark, DE 19714-7204
United States

phone: +302-565-4945
e-mail: piprek(at)

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Joachim Piprek received his Diploma and Doctoral degrees in physics from Humboldt University in Berlin, Germany. For more than two decades, he worked in industry and academia on design, simulation, and analysis of various semiconductor devices used in optoelectronics. Dr. Piprek has taught graduate courses at universities in Germany, Sweden, and in the United States. He is founder and co-chair of the annual conference on Numerical Simulation of Optoelectronic Devices (IEEE) and he also chaired several SPIE conferences (profile). Dr. Piprek was invited guest editor for various special journal issues on optoelectronic device simulation and he also peer-reviewed more than 500 journal articles in this field. Currently, he serves as editor of the first Handbook of Optoelectronic Device Modeling and Simulation and as executive/associate editor for two research journals. He has published 3 books (side panel), 6 book chapters, and about 250 papers with nearly 6000 citations. Recent invited talks include:

How to decide between competing GaN-LED efficiency droop models
International School on Nitride Materials and Devices, Bilkent University, Turkey, 2016

GaN-based Tunnel-Junction LED with 250% Peak Quantum Efficiency
SPIE Photonics West, San Francisco, 2015