EDISON 20 will be the 20th meeting of the international conference series that was first established as “Hot Carriers in Semiconductors”, and held in Modena, Italy in 1973. Since then the meeting has been held on a biennial basis, cycling sequentially between Europe, the US and Japan. Prior meetings were held in: Denton, USA (1977); Montpellier, France (1981); Innsbruck, Austria (1985); Boston, USA (1987); Scottsdale, USA (1989); Nara, Japan (1991); Oxford, UK (1993); Chicago, USA (1995); Berlin, Germany (1997); Kyoto, Japan (1999); Santa Fe, USA (2001); Modena, Italy (2003); Chicago, USA (2005); Tokyo, Japan (2007); Montpellier, France (2009); Santa Barbara, USA (2011); Matsue, Japan (2013), and; Salamanca, Spain (2015). The meeting serves as the premier forum for researchers working on the study of nonequilibrium phenomena in semiconductors, from all parts of the globe.