MoO3-induced oxidation doping of PEDOT:PSS for high performance full-solution-processed inverted quantum-dot light emitting diodes

Min Hsuan Lee, Lixiang Chen, Ning Li, Fu Rong ZHU*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Full-solution processed inverted quantum dot light-emitting diodes (QD-LEDs) are promising candidates for application in next generation active matrix displays, due to their low-cost solution fabrication processes and easy integration with n-type thin-film transistor backplanes. In this work, we report high performance transparent inverted QD-LEDs using a full-solution processable hybrid composite anode, formulated using poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), solution-processed molybdenum trioxide (s-MoO3), and silver nanowires. The effect of the aqueous s-MoO3 additive in the PEDOT:PSS anode on efficient operation of the QD-LEDs was systematically investigated. Our results show that the s-MoO3 additive not only enhances the wettability of the PEDOT:PSS surface, but also improves the conductivity of the PEDOT:PSS layer, leading to an ohmic contact between the composite anode and the hole transporting layer for efficient hole injection. With an optimal s-MoO3 addition in the PEDOT:PSS anode, the full-solution processable inverted QD-LEDs with a maximum current efficiency of 1.39 cd A-1 and a visible light transparency of over 70% were demonstrated. The composite transparent anode enables a 27% increase in current efficiency of the full-solution processable QD-LEDs compared to that of the structurally identical control device without the s-MoO3 additive. The encouraging results suggest that our investigation paves the way for the development of efficient vacuum-free transparent inverted QD-LEDs.

Original languageEnglish
Pages (from-to)10555-10561
Number of pages7
JournalJournal of Materials Chemistry C
Volume5
Issue number40
DOIs
Publication statusPublished - 2017

Scopus Subject Areas

  • Chemistry(all)
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'MoO<sub>3</sub>-induced oxidation doping of PEDOT:PSS for high performance full-solution-processed inverted quantum-dot light emitting diodes'. Together they form a unique fingerprint.

Cite this