ReO_x charge injection/blocking layers in organic electronic devices

摘要

The charge transport of rhenium oxide (ReO_x) in organic electronic devices was investigated. The hole injection/transport was blocked and the electron injection/transport was enhanced with doping of ReO_x in organic electronic devices. Thus the charge balance and efficiency of organic light-emitting diodes were improved; current efficiency of 2.7 cd A ~(-1) at 20 mA cm~(-2) for the device with ReO_x was higher than 1.5 cd A~(-1) for the device without it. In the case of organic photovoltaic cells, the open-circuit voltage (V_(oc)), 0.58 V, was higher compared with the device without ReO_x (0.44 V) due to the improvement of interface properties. The power conversion efficiency was increased to 2.27% by the combination of ReO_x (increases V _(oc)) with poly(3,4-ethylenedioxythiophene): poly(styrene-sulfonate) (improves hole transport to increase J_(sc)) on the modification of the anode, higher than 1.85% for the device without ReO_x.