supported by the National Natural Science Foundation of China(Nos.61233010 and 61274043);the Program for New Century Excellent Talents in University of Ministry of Education of China(No.NCET-11-0975)
A novel composite ultraviolet(UV)/blue photodetector is proposed in this paper.Lateral ring-shaped PN junction is used to separate photogenerated carriers and inject the non-equilibrium excess carriers to the bulk,cha...