Non-Heterostructured Organic Light-Emitting Diodes Based on Horizontally Oriented TSBF (Ter (9, 9’-Spirobifluorene))

Abstract

Horizontally oriented ter (9, 9’-spirobifluorene) (TSBF) based organic light-emitting diodes (OLEDs) were fabricated with the device structure that has no heterointerfaces (anode/n-TSBF/TSBF/p-TSBF/ cathode). Optimizing the doping concentration and the thicknesses of n-and p-doped TSBF layers, we found the possibility to suppress the efficiency roll-off characteristics. These results indicate the potential use of TSBF for realizing organic solid-state lasers.