Hiroko Nomura

TL;DR: A class of metal-free organic electroluminescent molecules in which the energy gap between the singlet and triplet excited states is minimized by design, thereby promoting highly efficient spin up-conversion from non-radiative triplet states to radiative singlet states while maintaining high radiative decay rates.

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: 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: 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.

TL;DR: In this paper, a novel way to realize high electroluminescence (EL) efficiency is proposed, which is based on triplet-triplet annihilation and thermally activated delayed fluorescence (TADF).