MSS 0483, Karl Wolfgang Böer papersPhysicist, inventor, university professor, and solar energy pioneer Karl Wolfgang Böer was born March 23, 1926, in Berlin, Germany. He became a naturalized American citizen in August 1972. The Karl Wolfgang Böer papers, 1945-2003, document the life work and professional career of this German-American physicist, inventor, university professor, and solar energy pioneer. Böer's work in solid state technology, understanding the photoconductivity and structure of cadmium sulfide, and photovoltaics are seminal to twentieth-century advances in solar energy conversion and the modern energy conservation movements. Dr. Böer's papers are integrally related to his career at the University of Delaware, where he has been since 1961. The collection reflects a relationship with the institution that allowed Böer to fulfill his academic role and conduct scientific research, while also allowing him every opportunity to build research laboratories and pursue entrepreneurial initiatives applying advances in technologies resulting from his research.