Synchronized Injection of Charge Carriers in Perovskite Light Emitting Transistors

Hybrid organic-inorganic perovskites are emerging as excellent materials for optoelectronic applications, such as light-emitting diodes and light-emitting transistors (PeLETs). PeLETs are a unique device concept used to independently tune transport and recombination parameters such as carrier density, mobility and injection spatial and temporal characteristics [1] . Unfortunately, these devices suffer from low brightness and environmental instability related to intrinsic material limitations, such as temperature-activated trapping, ionic motion and polarization effects, which limit device performance. Pulsed mode operation (AC-driven mode, with AC bias applied to the gate electrode) has proven a viable route to overcome some of these limitations by minimization of ionic vacancy drift and organic cation polarization and improvement of charge carrier injection via space-charge field-assisted injection [2] .