P‐9.1: Investigation of Electroluminescent Response of Quantum Dot Light‐Emitting Diodes. (28th November 2018)

• Record Type: Journal Article
• Authors: Huang, Yucong; Xu, Dingxin; Chen, Shuming
• Is Part Of: Digest of technical papers. Volume 49(2018)Supplement 1
• Page Start: 656
• Page End: 659
• Publication Date: 2018-11-28
• Subjects: QLEDs -- electroluminescence -- response -- visible light communications; Information display systems -- Congresses; 621.3815422
• DOI: 10.1002/sdtp.12807
• Languages: English
• ISSNs: 0097-966X

Abstract

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.