Title: Enhancement of green quantum dot light-emitting diodes with Au NPs in the hole injection layer

Authors: Jaemin Kim; Jiwan Kim

Addresses: Department of Advanced Materials Engineering, Kyonggi University, Gwanggyosan-ro 154-42, Yeongtong-gu, Suwon, Gyeonggi-do, 16227, South Korea ' Department of Advanced Materials Engineering, Kyonggi University, Gwanggyosan-ro 154-42, Yeongtong-gu, Suwon, Gyeonggi-do, 16227, South Korea

Abstract: In this work, we report the fabrication and characterisation of quantum dot light-emitting diodes (QLEDs) with Au nanoparticles (NPs) in a hole injection layer (HIL). When using ZnO NPs, the entire fabrication, with the exception of electrode deposition, was based on the solution process. At high Au NPs concentration (0.03 mg/ml), the QLEDs showed low leakage current, and both luminance and current efficiency improved by about 200%. By comparing two different locations of Au NPs within QLEDs, we found that the QLEDs with blended HIL showed three times higher current efficiency than those with separate HIL coatings. The coupling effect between the excitons and the local surface plasmon resonance leads to enhanced device performance.

Keywords: colloidal quantum dots; QLEDs; quantum dot light-emitting diodes; Au nanoparticles.

DOI: 10.1504/IJNT.2018.096339

International Journal of Nanotechnology, 2018 Vol.15 No.6/7, pp.485 - 492

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 17 Nov 2018 *

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