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  • Oleg Vladimirovich Losev was a scientist and inventor, born to a high-ranking family in Imperial Russia. He published a number of papers and patents during his short career. He observed light emission from carborundum point-contact junctions, the first light-emitting diode. He explored negative resistance in semiconductor junctions, building the first solid-state amplifiers, oscillators, and superheterodyne radio receivers 25 years before the invention of the transistor. However his achievements were overlooked, and languished for half a century before being recognized in the late 20th and early 21st century. In 1907, H. J. Round made a very brief report in Electrical World regarding light coming from SiC by electrical excitation. Losev's papers provided much more detailed information than Round.

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