Stoyan Petrov detected and examineed new types of color centers in ionic crystals and method for pure substances.
Stoyan Petrov was teacher in Plovdiv and in III Men's High School in Sofia (1981).
He was first dean of the Technical Faculty at the University of Varna (1945), where he founded Department of Physics.
Latter on in Ruse he established and headed the Department of Physics at the Higher Technical School "Angel Kanchev" (in 1954).
Member Fellow of the Society of the Physicists in Bulgaria.
In Memoriam. Професор Стоян Христов Петров (1939 – 2011), Светът на физиката, (3) с. 196 (1991)