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Citation: ZHANG Rui, LI Yang, DUAN Lian, ZHANG De-Qiang, QIU Yong. Efficient Organic Light-emitting Diode Using Lithium Tetra-(8-hydroxy-quinolinato) Boron as the Electron Injection Layer[J]. Acta Physico-Chimica Sinica, ;2007, 23(04): 455-458. doi: 10.1016/S1872-1508(07)60029-1 shu

Efficient Organic Light-emitting Diode Using Lithium Tetra-(8-hydroxy-quinolinato) Boron as the Electron Injection Layer

1.
Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China

Received Date: 10 January 2007
Available Online: 4 April 2007

High performance organic light-emitting diodes (OLEDs) with lithium tetra-(8-hydroxy-quinolinato) boron (LiBq4), instead of LiF, as the electron injection layer, and aluminum as the cathode were fabricated. In the fabrication of the devices, N,N'-bis-(1-naphthyl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) was used as the hole transport layer, and tri-(8-quinolinolato) aluminum (Alq3) as the emitting and electron transport layer. By using LiBq4 as the electron injection layer, the device's performance with regard to luminance, current efficiency, and turn-on voltage was superior to that of the device using LiF as the electron injection layer. The experimental results could be explained by the improved electron injection and charge balance.
- Lithiumtetra-(8-hydroxy-quinolinato) boron; Electron injection; Organic light-emitting diodes
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