佩多:嘘
材料科学
电极
量子点
光电子学
工作职能
紫外光电子能谱
氧化铟锡
X射线光电子能谱
硫酸
量子效率
发光二极管
化学工程
纳米技术
化学
薄膜
冶金
图层(电子)
物理化学
工程类
作者
Jin Won Hyun,Min Gye Kim,Jun Hyung Jeong,Min Ho Park,Hyoun Ji Ha,Seong Jae Kang,Seong Jun Kang
出处
期刊:Materials
[MDPI AG]
日期:2023-05-29
卷期号:16 (11): 4053-4053
被引量:1
摘要
We present a study on the potential use of sulfuric acid-treated poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) as a viable alternative to indium tin oxide (ITO) electrodes in quantum dot light-emitting diodes (QLEDs). ITO, despite its high conductivity and transparency, is known for its disadvantages of being brittle, fragile, and expensive. Furthermore, due to the high hole injection barrier of quantum dots, the need for electrodes with a higher work function is becoming more significant. In this report, we present solution-processed, sulfuric acid-treated PEDOT:PSS electrodes for highly efficient QLEDs. The high work function of the PEDOT:PSS electrodes improved the performance of the QLEDs by facilitating hole injection. We demonstrated the recrystallization and conductivity enhancement of PEDOT:PSS upon sulfuric acid treatment using X-ray photoelectron spectroscopy and Hall measurement. Ultraviolet photoelectron spectroscopy (UPS) analysis of QLEDs showed that sulfuric acid-treated PEDOT:PSS exhibited a higher work function than ITO. The maximum current efficiency and external quantum efficiency based on the PEDOT:PSS electrode QLEDs were measured as 46.53 cd/A and 11.01%, which were three times greater than ITO electrode QLEDs. These findings suggest that PEDOT:PSS can serve as a promising replacement for ITO electrodes in the development of ITO-free QLED devices.
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