222 nm single-peaked deep-UV LED with thin AlGaN quantum well layers Norimichi, Noguchi ; Hirayama, Hideki ; Yatabe, Tohru ; Kamata, Norihiko Abstract Publication: Physica Status Solidi C Current Topics Pub Date: June 2009 DOI: 10.1002/pssc.200880923 Bibcode: 2009PSSCR...6S.459N