| 초록 |
Displaying information on transparent screens offer new opportunities for next-generation electronics such as smart surgical glasses, augmented reality devices, and smart windows. Achieving outstanding luminance and transparency is essential for ‘see-through’ displays to show vivid images over clear background views. Here, we report transparent quantum dot light-emitting diodes (Tr-QLEDs) with extreme brightness, high colour purity, and ultrathin form factors. Our Tr-QLEDs exhibit impressive luminance (＞40,000 cd∙m–2 at 9 V) and transmittance (＞90% at 515 nm) that are superior to other available transparent displays. These superb characteristics are accomplished by engineered electron transport layers (ETLs) and structurally-optimized nanocrystal quantum dots (QDs). The novel ETLs, zinc oxide nanoparticle assembly coated with thin alumina overlayers, protect QDs from the sputtering damage and balance the electron/hole injection into the QDs. Due to their ultrathin nature (total thickness ~3 μm), these Tr-QLEDs can be conformally integrated on the various curved glassware. The Tr-QLEDs present a step forward to the next-generation display. |
