High performance top-emitting organic light-emitting diodes with copper iodide-doped hole injection layer

作者：Lee Jae Hyun; Leem Dong Seok; Kim Jang Joo^*

来源：Organic Electronics, 2008, 9(5): 805-808.

DOI：10.1016/j.orgel.2008.05.011

• top-emitting OLEDs
• CuI
• Ag electrode
• Lambertian

Efficient top-emitting organic light-emitting diodes were fabricated using copper iodide (CuI) doped 1,4-bis[N-(1-naphthyl)-N'-phenylamino]-4,4'-diamine (NPB) as a hole injection layer and Ir(PPY)(3) doped CBP as the emitting layer. CuI doped NPB layer functions as an efficient p-doped hole injection layer and significantly improves hole injection from a silver bottom electrode. The top-emitting device shows high current efficiency of 69 cd/A with Lambertian emission pattern. The enhanced hole injection is originated from the formation of the charge transfer complex between Cut and NPB.

• 出版日期2008-10