High-Efficiency Fluorescent Blue Organic Light-Emitting Device with Balanced Carrier Transport

Abstract

We demonstrate a blue fluorescent organic light-emitting device having a current efficiency of and an external quantum efficiency of 8.32% at . While driving at , the device showed a current efficiency of with a CIE coordinate at (0.155, 0.239) and an operation voltage of . The estimated half-decay lifetime is at an initial luminance of . The improved performance is the result of better carrier balance which is achieved by using bis(10-hydroxybenzo[h]quinolinato)beryllium as the electron-transport layer.