Explore the groundbreaking double-heterostructure concept in lasers, LEDs, and solar cells through this illuminating 38-minute talk by Eli Yablonovitch from the University of California, Berkeley. Delivered at the APS March Meeting 2018 in Los Angeles, CA, this presentation delves into the fundamental solution for solid-state electronics: keeping carriers away from defect-prone surfaces. Learn how alloying different III-V semiconductors with varying bandgaps enables safe confinement of electrons and holes, leading to advancements in semiconductor lasers, light-emitting diodes, and solar cells. Discover the journey from the concept's inception to its recognition as essential for optimal solar cell performance. Gain insights into semiconductor bandgaps, catalysts, electronics history, and the accidental nature of this breakthrough. Examine the optimization of solar cells, including record-breaking designs, thermal photovoltaics, and innovative applications like thermo photovoltaic cars. This comprehensive talk covers everything from the basics to cutting-edge developments in semiconductor technology and its applications in energy conversion. Read more