Enhanced radiative decay in organic light-emitting diodes by combination of cesium carbonate and silver nanocluster

The influence of the cesium carbonate/silver nanocluster/cesium carbonate electron-injection structure (CSC-EIS) is investigated in this study. When the CSC-EIS replaces the cesium carbonate electron-injection structure (CEIS), the shorter response time and rising time is obtained by measuring transient electroluminescence. In addition, the radiative decay rate for the device with the CSC-EIS is enhanced by 43% compared with that of the device with the CEIS because the localized electric field around SNCs is enhanced and the electron-injection barrier between the cathode and the electron-transport layer is remarkably reduced, resulting in the increase in the electron injection from the cathode to emitting layer.