Flexible and Transparent Electrode of Hybrid Ti3C2TXMXene-Silver Nanowires for High-Performance Quantum Dot Light-Emitting Diodes

Wei Jiang, Seokyeong Lee, Kaiying Zhao, Kyuho Lee, Hyowon Han, Jin Woo Oh, Hyeokjung Lee, Hyerim Kim, Chong Min Koo, Cheolmin Park

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

The development of electrodes with high conductivity, optical transparency, and reliable mechanical flexibility and stability is important for numerous solution-processed photoelectronic applications. Although transparent Ti3C2TXMXene electrodes with high conductivity are promising, their suitability for displays remains limited because of the high sheet resistance, which is caused by undesirable flake junctions and surface roughness. Herein, a flexible and transparent electrode has been fabricated that is suitable for a full-solution-processed quantum dot light-emitting diode (QLED). An MXene-silver nanowire (AgNW) hybrid electrode (MXAg) consists of a highly conductive AgNW network mixed with solution-processed MXene flakes. Efficient welding of wire-to-wire junctions with MXene flakes yields an electrode with a low sheet resistance and a high transparency of approximately 13.9 ω sq-1and 83.8%, respectively. By employing a thin polymer buffer layer of poly(methyl methacrylate) (PMMA), followed by mild thermal treatment, a hybrid PMMA-based MXene-AgNW (MXAg@PMMA) electrode in which the work function of an MXAg hybrid FTE physically embedded in PMMA (MXAg@PMMA) can be tuned by controlling the amount of MXene in the hybrid film facilitates the development of a high-performance solution-processed QLED that exhibits maximum external quantum and current efficiencies of approximately 9.88% and 25.8 cd/A, respectively, with excellent bending stability. This work function-tunable flexible transparent electrode based on solution-processed nanoconductors provides a way to develop emerging high-performance, wearable, cost-effective, and soft electroluminescent devices.

Original languageEnglish
Pages (from-to)9203-9213
Number of pages11
JournalACS nano
Volume16
Issue number6
DOIs
Publication statusPublished - 2022 Jun 28

Bibliographical note

Funding Information:
This research was supported by Creative Materials Discovery Program and National R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (No. 2018M3D1A1058536 and No. 2021M3H4A1A03047331). This research was also supported by a grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MEST) (No. 2020R1A2B5B03002697).

Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.

Keywords

  • TiCTMXene silver nanowire hybrid electrode
  • flexible and transparent electrodes
  • flexible quantum dot light-emitting diodes
  • large-area solution-processed electrodes
  • work function tunable electrode

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy

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