摘要
A new model to describe I-V characteristics of organic light emitting devices (OLEDs) is developed based on experimental results. The dependence of I-V characteristics on energy barrier, trap density and carrier mobility is analyzed. The result shows that this model combines the Fowler Nordheim tunnel theory and the trap charge limited current theory with exponential trap distribution (TCL), and it describes the current transport characteristics of OLEDs more comprehensively. The I-V characteristics follow Fowler Nordheim theory when the energy barrier is high, the trap density is small and the carrier mobility is large.In other cases they follow the TCL theory.
A new model to describe I--V characteristics of organiclight-emitting devices (OLEDs) is developed based on experimentalresults. The dependence of I--V characteristics on energy barrier,trap density and carrier mobility is analyzed. The result shows thatthis model combines the Fowler-Nordheim tunnel theory and the trapcharge limited current theory with exponential trap distribution(TCL), and it describes the current transport characteristics ofOLEDs more comprehensively. The I--V characteristics followFowler-Nordheim theory when the energy barrier is high, the trapdensity is small and the carrier mobility is large. In other casesthey follow the TCL theory.
基金
NationalNaturalScienceFoundationofChina(No .60 0 760 2 3)
