Highly efficient, ultralow turn-on voltage red and white organic light-emitting devices based on a novel exciplex host

Abstract

The exciplex forming co-host is one of the most promising candidates for developing high-performance organic light-emitting devices (OLEDs) that can implement an internal quantum efficiency of 100%. In this work,...

Single-component electroluminescent white light-emitting diodes based on zinc oxide quantum dots with high color rendition and tunable correlated color temperature

“…It was also observed that V on (defined as the voltage at 1 cd m −2 ) of both the pure poly-TPD and poly-TPD:TFB single-component ZnO-WLEDs is around 2 V, which is much smaller than those of other types of WLEDs. 16,17,19,35–37 Thus, the EL performance of the present devices is best among that of the single-component ZnO-WLEDs reported so far. Moreover, the optimized L max in the single-component ZnO-WLEDs based on poly-TPD:TFB is nearly twice that in the neat poly-TPD-based devices.…”

Management of Exciton Distribution for High-Performance Organic Light-Emitting Diodes Based on Interfacial Exciplex Architecture

“…Figure 2a,b exhibit the detailed energy level diagram and the molecule structures of required materials, respectively. The formation of exciplex could be demonstrated by the red-shift PL spectrum of mixed film compared with those of constituting molecules and TADF characteristics in transient PL decayed curves in Figure S1 [30]. The exciplex of 26DCzPPy: B4PyPPM possesses a minor ∆E ST of 35 meV and an efficient RISC process, which are beneficial for preparing efficient OLEDs [31].…”

Highly stable deep red-to-NIR OLEDs with an external quantum efficiency of 4.9% from room temperature nanostructured columnar fluids based on hetero atom bay-annulated perylene bisimides

“…[80][81][82][83][84] Furthermore, higher doping concentrations of emitters may lead to nonradiative decay of excitons due to the Auger recombination. 85,86 We have also observed the effects of doping concentration on EL spectra of these devices. With the increase in dopant concentration from 1 to 5 wt%, the EL spectra of the devices shifted more towards the red region.…”