High-luminance Perovskite Light-emitting Diodes with High-polarity Alcohol Solvent Treating PEDOT:PSS As Hole Transport Layer

Overview

Journal Nanoscale Res Lett

Publisher Springer

Specialty Biotechnology

Date 2018 Apr 28

PMID 29700685

Citations 5

Authors

Mengge Wu

Dan Zhao

Zijun Wang

Junsheng Yu

Affiliations

Soon will be listed here.

Abstract

Background: Perovskite light-emitting diodes (PeLEDs) are fabricated with a structure of indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS)/CHNHPbBr (MAPbBr)/1,3,5-tris(2-N-phenylbenzimidazolyl) benzene (TPBi)/Ag.

Pedot: PSS films treated with alcohols including methanol, ethanol, and isopropanol are used to realize high-performance PeLEDs. Among them, by using PEDOT:PSS film treated by methanol as the hole transport layer, the PeLED with a maximum luminance of 2075 cd m and a maximum current efficiency of 0.38 cd A is achieved. Meanwhile, the result shows that the luminance of PeLEDs increases with the polarity of alcohol solvent. The conductivity of PEDOT:PSS films and crystallization of perovskite films are analyzed to gain a deep illumination into the influence of alcohol solvent treatment on device performance. It is also found that the treatment brings not only an improved hole injection capability but also a significantly enhanced crystallization of perovskite. This work indicates that our founding brings a simple and effective method to improve the device performance of PeLEDs.

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