65‐7: Student Paper: Cd‐Free Quantum‐Dot Light‐Emitting Diode with a Mixed Single Layer to improve the Flatness of Current Efficiency

Abstract

The performance of the Cd‐free quantum‐dot light emitting diode (QLED) was investigated by mixing the hole and electron transport materials with the emission layer. With an optimized mixing ratio of the hole transport and electron transport materials, the current efficiency of 4.2 cd/A and EQE of 2.2% was achieved using the ZnCuInS/ZnS‐based QLED at yellow emission. Additionally, after optimizing the mixing ratios, the carrier injection is balanced, so the current efficiency is constant for wide current densities.