Ultrathin PEDOT:PSS Enables Colorful and Efficient Perovskite Light‐Emitting Diodes

Jianxun Lu; Wenjing Feng; Guanding Mei; Jiayun Sun; Chuanzhong Yan; Di Zhang; Kebin Lin; Dan Wu; Kai Wang; Zhanhua Wei

doi:10.1002/advs.202000689

Advanced Science (Jun 2020)

Ultrathin PEDOT:PSS Enables Colorful and Efficient Perovskite Light‐Emitting Diodes

Jianxun Lu,
Wenjing Feng,
Guanding Mei,
Jiayun Sun,
Chuanzhong Yan,
Di Zhang,
Kebin Lin,
Dan Wu,
Kai Wang,
Zhanhua Wei

Affiliations

Jianxun Lu: Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and Engineering Huaqiao University Xiamen 361021 P. R. China
Wenjing Feng: Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and Engineering Huaqiao University Xiamen 361021 P. R. China
Guanding Mei: Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen 518055 P. R. China
Jiayun Sun: Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen 518055 P. R. China
Chuanzhong Yan: Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and Engineering Huaqiao University Xiamen 361021 P. R. China
Di Zhang: Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and Engineering Huaqiao University Xiamen 361021 P. R. China
Kebin Lin: Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and Engineering Huaqiao University Xiamen 361021 P. R. China
Dan Wu: Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen 518055 P. R. China
Kai Wang: Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen 518055 P. R. China
Zhanhua Wei: Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and Engineering Huaqiao University Xiamen 361021 P. R. China

DOI: https://doi.org/10.1002/advs.202000689
Journal volume & issue: Vol. 7, no. 11
pp. n/a – n/a

Abstract

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Abstract Recently, metal halide perovskite light‐emitting diodes (Pero‐LEDs) have achieved significant improvement in device performance, especially for external quantum efficiency (EQE). And EQE is mostly determined by internal quantum efficiency of the emitting material, charge injection balancing factor (ηc), and light extraction efficiency (LEE) of the device. Herein, an ultrathin poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (UT‐PEDOT:PSS) hole transporter layer is prepared by a water stripping method, and the UT‐PEDOT:PSS can enhance ηc and LEE simultaneously in Pero‐LEDs, mostly due to the improved carrier mobility, more matched energy level alignment, and reduced photon loss. More importantly, the performance enhancement from UT‐PEDOT:PSS is quite universal and applicable in different kinds of Pero‐LEDs. As a result, the EQEs of Pero‐LEDs based on 3D, quasi‐3D, and quasi‐2D perovskites obtain enhancements of 42%, 87%, and 111%, and the corresponding maximum EQE reaches 17.6%, 15.0%, and 6.8%, respectively.

Published in Advanced Science

ISSN: 2198-3844 (Online)
Publisher: Wiley
Country of publisher: Germany
LCC subjects: Science
Website: https://onlinelibrary.wiley.com/journal/21983844

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