The temperature difference compensation effect of BCP-based OLEDs by variable temperature transient electroluminescence

Abstract

The variable temperature transient electroluminescence characteristics in BCP-based organic light emitting diodes (OLEDs) are studied in this paper. The temperature difference compensation effect (TDCE) is found in the BCP-based OLEDs with different structures by transient electroluminescence response. The TDCE was affected by electron mobility and electron suppression traps, when the temperature is between 200 K and 300 K, the compensation temperature difference caused by electron mobility and electron suppression traps is 25 K and 20 K, respectively. Moreover, we calculate the derivative of the effective exciton numbers to temperature, and find that the inflection point temperature difference between different devices is consistent with the compensation temperature difference.