Room-Temperature Pure Blue-Emitting Phosphorescent Multinuclear Cu(I)-Based Emitters

In this paper, we report two easily synthesized pure blue-emitting phosphorescent Cu(I)-based emitters. The phosphorescent nature of the blue emissions (λem =442 and 450 nm) has been identified by both theoretical calculations and experimental data. The blue emissions are the closest to pure blue light among phosphorescent Cu(I) complexes, and their photoluminescence characters are comparable with those of reported noble metal complexes. An electroluminescent device using one of the blue-emitting emitters is fabricated, and a maximum brightness of 1140 cd/ m2 is achieved. © 2009 The Electrochemical Society.