Yellowlees returned to the University of Edinburgh , to do a PhD on solar cell chemistry .
Yellowlees became a demonstrator in 1986 , a lecturer in 1989 and was appointed Professor of Inorganic Electrochemistry in 2005 .
Returning to the University of Edinburgh , to do a PhD on solar cell chemistry , Yellowlees became a demonstrator in 1986 , a lecturer in 1989 and was appointed Professor of Inorganic Electrochemistry in 2005 .