Toward Full-Color Electroluminescent Quantum Dot Displays

Abstract

Colloidal quantum dots (QDs) exhibit unique characteristics such as facile color tunability, pure color emission with extremely narrow bandwidths, high luminescence efficiency, and high photostability. In addition, quantum dot light-emitting diodes (QLEDs) feature bright electroluminescence, low turn-on voltage, and ultrathin form factor, making them a promising candidate for next-generation displays. To achieve the overarching goal of the full-color display based on the electroluminescence of QDs, however it is essential to enhance the performance of QLEDs further for each color (e.g., red, green, and blue; RGB) and develop novel techniques for patterning RGB QD pixels without cross-contamination. Here, we present state-of-the-art material, process, and device technologies for full-color QLED-based displays. First, we highlight recent advances in the development of efficient red-, green-, and blue-monochromatic QLEDs. In particular, we focus on the progress of heavy-metal-free QLEDs. Then, we describe patterning techniques for individual RGB QDs to fabricate pixelated displays. Finally, we briefly summarize applications of such QLEDs, presenting the possibility of full-color QLED-based displays.

Toward phosphorescent and delayed fluorescent carbon quantum dots for next-generation electroluminescent displays

“…1a and b), has advanced by leaps and bounds toward wide color gamut, high brightness, and long lifetimes. 1–4 Generally, electroluminescent display technologies can be divided into two categories based on the types of luminescent materials, i.e. , organic LEDs (OLEDs) and quantum dot LEDs (QLEDs).…”

Mechanism of morphology variations in colloidal CuGaS2 nanorods

“…Colloidal semiconductor nanocrystals are materials of broad interest, finding applications in multiple areas including sensors, [1][2][3] luminescent solar concentrators, 4,5 displays, [6][7][8] and biomedical imaging. 9,10 Anisotropic shapes and heterostructures provide additional benefits, such as polarized light emission, [11][12][13] improved and/or directional conductivity, and the potential for multi-functional devices.…”

63‐2: Student Paper: Thin‐film Compatible Process High Resolution Patterning of Quantum Dots Light‐emitting Diodes

“…(3)(4)(5)(6) However, the compatibility of solution-processed QDs with the current thin-film process is blocking the application of quantum dots light-emitting diodes (QLED). (7) The ink-jet printing is a powerful solution to the obstruction, but still need a bank structure on substrate to isolate the pixel, otherwise, the resolution is seriously limited by the hydromechanics and positioning accuracy of the printer itself. (8) The requirement of the bank structure for QLED is much thinner than the traditional bank for photoluminescence (PL) application.…”