Stable and Efficient Organic Light Emitting Diodes Based on a Single Host of p-doped and n-doped Layers

Abstract

A power-efficient and stable organic light emitting diode with a simplified structure based on 2-methyl-9, 10-di(2-naphthyl)anthracene (MADN) has been developed. The incorporation of 10% tungsten oxide (WO(3)) into MADN and 15% cesium carbonate (Cs2CO(3)) into MADN has been found to improve the hole and electron injection, respectively. Based on this work, it is anticipated that p-i-n OLEDs fabrication process can be considerably simplified and the bill of materials cost can reduced by using one ambipolar host for both the p- and n-doped carrier transport layers.