Abstract Physicist, 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...