JIA Yong, DENG Zhen-bo, XIAO Jing, XU Deng-hui, CHEN Zheng, LIU Xiang, L&#220; Zhao-yue. The Effect of PBD as Electron-transporting Layer in Alq<sub>3</sub>:DCJTB Organic Light-emitting Devices[J]. Chinese Journal of Luminescence, 2008,29(1): 23-26
JIA Yong, DENG Zhen-bo, XIAO Jing, XU Deng-hui, CHEN Zheng, LIU Xiang, L&#220; Zhao-yue. The Effect of PBD as Electron-transporting Layer in Alq<sub>3</sub>:DCJTB Organic Light-emitting Devices[J]. Chinese Journal of Luminescence, 2008,29(1): 23-26DOI:
Organic light-emitting devices (OLEDs) with PBD electron-transporting layer were fabricated. The effect of PBD electron-transporting layer on the spectrum of the devices was investigated by doping PBD in NPB or DCJTB. The spectra of two devices are different from each others. Due to PBD layer transfer parts of the electrons to the layer of NPB
electrons meet holes in NPB and emit blue light. Especially
there are four peaks in the spectrum of device (3). By the method of Gaussian fitting it should be ascribed to the emissions of NPB
Alq
3
DCJTB and exciplex which occurs at the interface between NPB and PBD:DCJTB. The formation of the exciplex is analyzed.