Phosphorescent organic light emitting diodes with high efficiency and brightness

Patent · Thu Nov 12 00:00:00 EST 2015

OSTI ID:1225699

Forrest, Stephen R; Zhang, Yifan

An organic light emitting device including a) an anode; b) a cathode; and c) an emissive layer disposed between the anode and the cathode, the emissive layer comprising an organic host compound and a phosphorescent compound exhibiting a Stokes Shift overlap greater than 0.3 eV. The organic light emitting device may further include a hole transport layer disposed between the emissive layer and the anode; and an electron transport layer disposed between the emissive layer and the cathode. In some embodiments, the phosphorescent compound exhibits a phosphorescent lifetime of less than 10 .mu.s. In some embodiments, the concentration of the phosphorescent compound ranges from 0.5 wt. % to 10 wt. %.

• Research Organization: Univ. of Michigan, Ann Arbor, MI (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: SC0001013
• Assignee: The Regents of the University of Michigan
• Patent Number(s): 9,184,402
• Application Number: 14/268,398
• OSTI ID: 1225699
• Resource Relation: Patent File Date: 2014 May 02
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION