Volume 250, 2024
From the journal:

Faraday Discussions

Diluted PEDOT:PSS for high-performance organic light-emitting devices with thermally activated delayed fluorescence emitters†

Hui Fang,‡ab   Xiaoyun Chen,‡ab   Jinliang Lin,ab   Jiale Li,ab   Qin Xue*c  and  Guohua Xie ORCID logo *ab  

* Corresponding authors

a The Institute of Flexible Electronics (Future Technologies), Xiamen University, Xiamen 361005, China
E-mail: ifeghxie@xmu.edu.cn

b Sauvage Center for Molecular Sciences, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072, China

c Department of Physical Science and Technology, Central China Normal University, Wuhan 430079, China
E-mail: xueqin@mail.ccnu.edu.cn

Abstract

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a widely used conductive polymer in organic light-emitting devices. However, its strong acidity and fluorescence quenching effect seriously affect the overall device performance. We report a cost-effective method to address the above concerns by diluting PEDOT:PSS with deionized water, which effectively reduced the film thickness and the acidity. Therefore, the fluorescence quenching occurring at the interface was alleviated. Using the modified PEDOT:PSS as the hole injection layer, the external quantum efficiency of the device could be effectively improved by a factor of 81%, reaching a considerably higher value of 23.5%, compared with the device consisting of the original PEDOT:PSS solution used as received.

Graphical abstract: Diluted PEDOT:PSS for high-performance organic light-emitting devices with thermally activated delayed fluorescence emitters

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Article information

DOI
https://doi.org/10.1039/D3FD00136A
Article type
Paper
Submitted
11 Jul 2023
Accepted
22 Aug 2023
First published
23 Aug 2023

Faraday Discuss., 2024,250, 263-270

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Diluted PEDOT:PSS for high-performance organic light-emitting devices with thermally activated delayed fluorescence emitters

H. Fang, X. Chen, J. Lin, J. Li, Q. Xue and G. Xie, Faraday Discuss., 2024, 250, 263 DOI: 10.1039/D3FD00136A

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