ZnSeTe blue top-emitting QLEDs with color saturation near Rec.2020 standards and efficiency over 18.16%

ZnSeTe blue Cd-free quantum dot(QD)has emerged as a promising emitter for display applications due to its nontoxicity,tunable wavelength,and high efficiency.However,ZnSeTe-based quantum-dot light-emitting diodes(QLEDs)usually exhibit unsaturated emissions with broad spectra.Herein,a top-emitting structure,equipped with a transparent indium-zinc-oxide(IZO)top electrode and an IZO phase tuning layer(PTL),is developed to modulate the emission spectra and the efficiency of the devices.Saturated blue emissions with color coordinates beyond Recommendation ITU-R BT.709(Rec.709)and near Rec.2020 standards are achieved.Moreover,benefiting from the improved outcoupling efficiency and the enhanced charge balance,the top-emitting QLED demonstrates a high external quantum efficiency of 15.14%,which is further improved to 18.16%by capping the devices with SiO2 nanospheres.Simulation analysis reveals that the surface plasmon polariton(SPP)losses are effectively reduced by applying a 100 nm PTL,leading to an outcoupling efficiency of 41.2%at a wavelength of 478 nm.Due to the simultaneously enhanced color saturation and efficiency,a high chroma efficiency(current efficiency/y coordinate in Commission Internationale de l'Eclairage chart)of 123 is obtained.The developed top-emitting architecture could enable the realization of efficient and saturated QLEDs for wide color gamut high-definition display applications.

Erratum to:ZnSeTe blue top-emitting QLEDs with color saturation near Rec.2020 standards and efficiency over 18.16%

Erratum to Nano Research,2023,16(4):5517–5524 https://doi.org/10.1007/s12274-022-5172-y Three figures in the article were unfortunately mispresented on pages 5519,5521,and 5522.(1)The ordinate title of Fig.2(c)should be corrected to“Outcoupling efficiency(%)”.