N'oge agha ụwa nke abụọ, ọ mepụtara magnetron maka radar jamming, nke dugara na mmepe nke oven microwave. Mgbe ọ na-amụ njirimara nke p-i-n diodes eji dị ka ndị na-agbanwe ike, Hall nwere nghọta dị mkpa, nke mere ka ya na William Shockley na W. T. Gụọ, Jr., maka nyochaa nke ndị na-abụghị ndị na-ebugharị ụgbọelu na ndị na-ebugharị. Hall mepụtara laser semiconductor na 1962, mgbe ọ na-arụ ọrụ na General Electric na Schenectady, New York. N'afọ ndị 1970, ọrụ Hall lekwasịrị anya na photovoltaics na sel anyanwụ. Ọ lara ezumike nká na 1987, ebe e nyere ya patent 43 US n'oge ọrụ ya. Ajụjụ: Olee otú ọtụtụ patent ọ nwere site na oge ọ lara ezumike nká?
43 ihe