High-performance QLED research based on direct photo-crosslinking of PEDOT:PSS

Kai Zhang, Junpeng Fan, Changfeng Han, Rui Xu, Lintao Nie, Yuhan Sun, Lei Qian, Chaoyu Xiang, Ting Zhang

Research output: Journal PublicationArticlepeer-review


Poly(3,4-ethylene dioxythiophene)/poly(styrene sulfonic acid), abbreviated as PEDOT:PSS, is widely used in light-emitting diodes, solar cells, sensors, and other functional devices due to its high conductivity, transparency, and solution processability. In this study, the photo-reactive cross-linking agent 2,4-hexadiyne-1,6-diol (HOD) was introduced for a comparative study of photo-crosslinking in PEDOT:PSS AI 4083 (denoted as 4083) and PEDOT:PSS PH1000 (denoted as PH1000). The results showed that the aggregation state of 4083 was different from that of PH1000, ascribed to the composition of 4083 and PH1000 and the mechanism of the photo-crosslinking agent. Based on these findings, quantum dot light-emitting diode (QLED) devices were fabricated using direct photo-crosslinking PH1000. The work function based on PH1000 as a hole-injected layer (HIL) was increased from 5.03 eV to 5.22 eV, and the external quantum efficiency (EQE) was increased from 17.2% to 18.9%. This result provided a feasible solution for the application of PH1000 in high-performance QLED displays.

Original languageEnglish
Pages (from-to)7379-7383
Number of pages5
JournalNew Journal of Chemistry
Issue number16
Publication statusPublished - 11 Mar 2024

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Materials Chemistry


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