TY JOUR TI Optical study of InGaN/GaN MQWs on (11-22) sapphire KW semiconductor KW heterostructure KW orientation KW sapphire KW emission energy JO Actual directions of scientific researches of the XXI century: theory and practice AU Ilyasova, Z.. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov