%0 Journal Article %T Influence of the electric field on carriers recombination zone in bilayer organic electroluminescent device %A Shengyi Yang %A Zhenjia Wang %A Zheng Xu %A Xiaohong Chen %A Yanbing Hou %A Xurong Xu %J Chinese Science Bulletin %@ 1861-9541 %D 2000 %I %R 10.1007/BF02886226 %X The electroluminescence (EL) of bilayer devices (ITO/Polymer/Alq3/Al) made from two PPV derivatives (MN-PPV and MEH-PPV), respectively, and the influence of the organic layers¡¯ thickness on the characteristics of the device are investigated. Different spectra and variations are observed for different thicknesses of Alq3 layer in this bilayer organic light-emitting diodes (LEDs) as increasing applied bias. Based on the energy level and field-assisted tunneling at the interface, we attributed these phenomena to electric field redistribution in the device and field-assisted charges being transported and tunneling through energy barrier at high electric field. %K electroluminescence %K bilayer devices %K recombination zone %K carriers %U http://link.springer.com/article/10.1007/BF02886226