P‐9.1: Investigation of Electroluminescent Response of Quantum Dot Light‐Emitting Diodes

Abstract

Quantum‐dot light‐emitting diodes (QLEDs) may have revealing potential application in visible light communications (VLCs) because of their fast electroluminescent (EL) response. In this work, we systematically investigate the influence of device structures, the bias conditions and the device area on the EL response of QLEDs. To increase the response speed of QLEDs, the bias, the charge transport materials and the emitting area are carefully tuned. The optimized devices can well response when even driven by a signal with frequency of 10 MHz, and exhibit a delay time of 252 ns with a rise time of 390 ns and a fall time of 178 ns. Used in VLCs, the QLEDs can have a wide modulation bandwidth of 1.5 MHz. Our results indicate that QLEDs can be applied not only in fast response displays but also in VLCs.

Top-Emitting Active-Matrix Quantum Dot Light-Emitting Diode Array with Optical Microcavity for Micro QLED Display

“…A self-emitting QLED has excellent color performance, such as narrow and adjustable emission bandwidth and wavelength, viewed as next-generation lighting and display technology. Compared with other displays, QLED has higher image contrast and a faster response than QD-LCD [ 25 ], as well as a broader color gamut coverage than organic light-emitting diode (OLED) or micro-LED [ 26 , 27 , 28 ]. Furthermore, the solution-based fabrication process of QLED offers the advantages of large-area applications at a low manufacturing cost.…”