Unified Analysis of Transient and Steady-State Electroluminescence - Establishing an Analytical Formalism for OLED Charge Balance

摘要

Organic light-emitting devices (OLEDs) can exhibit an efficiency roll-off under high current excitation that has been previously modeled using bimolecular quenching. The corresponding transient electroluminescence behavior has not been as effectively treated Here, we reproduce both the steady-state and transient regimes by introducing into the analysis a dynamic polaron population. This approach permits a rigorous definition of OLED charge balance in terms of dynamics as the exciton formation efficiency.