Thermally activated delayed fluorescence (TADF) materials based on benzoylbenzophenone, AcPmBPX and PxPmBPX, were designed and synthesized. Organic light-emitting diodes using these materials as emitters exhibited high external electroluminescence quantum efficiencies of up to 11%.

In this paper, we discuss optical emission, energy transfer and electroluminescence from a superlattice structure containing small ( 2nm diameter) amorphous silicon (Si) clusters coupled to erbium (Er) ions. The superlattice structure is fabricated by direct co-sputtering of thin ( 3–5nm) Er-doped siliconrich nitride/Si (Er:SRN/Si) layers subsequently annealed at different temperatures in order...

This article reports forward and reverse biased emission in vertical ZnO nanowire/p-GaN heterojunction light emitting diodes (LEDs) grown out of solution on Mg-doped p-GaN films. The electroluminescence spectra under forward and reverse bias are distinctly different. Forward bias showed two peaks centered around 390 nm and 585 nm, while reverse bias showed a single peak at 510 nm. Analysis of t...