普凡想出了最早的一種點接式電晶體(英语:Point-contacttransistor),他改良了西方電氣(英语:Western Electric)的1N26型點接二極體使其成為三極放大器,後來被稱為A型電晶體(Type A transistor)。 1973年,普凡成為第一位摩爾傑出成就固態科學科技獎章(英语:Gordon
Academy Press, 2002. ISBN 0-309-08408-3 John Bardeen, Nobelist, Inventor of Transistor, Dies. Washington Post. January 31, 1991 [August 3, 2007]. (原始内容存档于November
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