Qisheng Zhang

TL;DR: In this article, a blue organic light-emitting diodes that harness thermally activated delayed fluorescence was realized with an external quantum efficiency of 19.5% and reduced roll-off at high luminance.

TL;DR: TADF has been characterized for a carbazole/sulfone derivative in both solutions and doped films and a pure blue organic light emitting diode (OLED) based on this compound demonstrates a very high external quantum efficiency (EQE) of nearly 10% at low current density.

TL;DR: It is shown that a large delocalization of the highest occupied molecular orbital and lowest unoccupied molecular orbital in these charge-transfer compounds enhances the rate of radiative decay considerably by inducing a large oscillator strength even when there is a small overlap between the two wavefunctions.

TL;DR: It is demonstrated that increasing the distance between donor (D) and acceptor (A) in intramolecular-charge-transfer molecules is a promising strategy for simultaneously achieving small ΔE(ST) and large k(F), which is in good agreement with those predicted by corrected time-dependent density functional theory.

TL;DR: The design of an aromatic molecule based on a spiro-acridine derivative leads to an organic light-emitting diode (OLED) that rivals phosphorescent devices regarding exciton generation efficiency.