Researchers say that exciton quenching and photon loss processes limit OLED efficiency and brightness. Organic light-emitting transistors (OLETs) are alternative, planar light sources combining, in the same architecture, the switching mechanism of a thin-film transistor and an electroluminescent device.
OLETs can be used to replace OLEDs in both display and lighting applications. According to new research, they are more than 100 times more efficient than equivalent OLEDs, and over 2 times more efficient than optimized OLED with the same emitting layer. There are still challenges for OLETs (the major one is operating voltage).