High efficiency blue organic light-emitting device based on Firpic

作者：Wang Guang De; Liu Tie Gong; Zhang Gang; Zhao Lei; Jiang Wen Long^*; Li Tong; Zhang Tian Yu; Xie Wen Fa

来源：Journal of Optoelectronics - Laser, 2011, 22(9): 1283-1285.

• Blocking layers
• Blue light
• Current efficiency
• Hole blocking layers
• Hole-blocking
• HOMO level
• Light emitting layers
• On currents
• Organic light-emitting devices

In order to make full use of energy transferring and hole blocking between the subject and the object in the light-emitting layer, the high efficiency blue light device is fabricated, whose structure is ITO/m-MTDATA(25 nm)/NPB(15 nm)/Ir(ppz)3(10 nm)/Simcp: Firpic (30 nm, 6%)/HBL(35 nm)/LiF(1 nm)/Al(200 nm). We have studied the effect of three different hole blocking layers on the current efficiency of blue light devices. The results has demonstrated that the material BCP, whose HOMO level is lower, has more influence on current efficiency. When the blocking layer is BCP and its thickness is 35 nm, the maximum current efficiency can reach 14.57 cd/A at 8 V bias voltage.

• 出版日期2011