Effects of UV-ozone treatment on the electronic structures of F8BT and PFO polymeric thin films

Choi, Seungsun; Kim, Wonsik; Shin, Woojin; Oh, Jaewon; Jin, Sila; Jung, Young Mee; Ryu, Mee‐Yi; Lee, Hyunbok

doi:10.1016/j.cap.2020.08.015

Cited by 6 publications

(1 citation statement)

References 25 publications

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“…The peak intensity gradually decreased with increasing NPB layer thickness. The thickness of the NPB layer was estimated by measuring the decrease in the Mo 3d peak intensity upon the NPB deposition [18]. The NPB thickness d was calculated using the following equation:…”

Section: Resultsmentioning

confidence: 99%

Thickness Dependence of MoO₃ Hole Injection Layer on Energy-Level Alignment with NPB Hole Transport Layers in OLEDs

Lee

2023

Appl. Sci. Converg. Technol.

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Efficient hole injection is crucial for the optimal functioning of organic light-emitting diodes (OLEDs), which require an anode system with a high work function. MoO 3 is commonly used for the hole injection layer (HIL) in OLEDs owing to its significantly high work function. However, the work function of the MoO 3 layer varies with thickness, which can affect the position of the highest occupied molecular orbital (HOMO) of the adjacent organic hole transport layer. Therefore, it is essential to understand the energy-level alignment of MoO 3 HILs with different thicknesses to design an efficient OLED structure. In this study, the energy-level alignment of indium tin oxide (ITO)/MoO 3 (20 nm)/N,N ′ -di(1-naphthyl)-N,N ′ -diphenyl-(1,1 ′ -biphenyl)-4,4 ′ -diamine (NPB) interfaces was investigated using in situ X-ray and ultraviolet photoelectron spectroscopy, and the results were compared with those of the ITO/MoO 3 (5 nm)/NPB interfaces. The 20 nm thick MoO 3 layer exhibited a high work function, leading to a significant decrease in the NPB HOMO level. These findings suggest that a sufficiently thick MoO 3 HIL is necessary to achieve optimal energy-level alignment and enhance the hole injection properties in OLEDs.

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Section: Resultsmentioning

confidence: 99%

Thickness Dependence of MoO₃ Hole Injection Layer on Energy-Level Alignment with NPB Hole Transport Layers in OLEDs

Lee

2023

Appl. Sci. Converg. Technol.

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Electronic structure of P3HT film oxidized by ultraviolet–ozone treatment

Shin

Kim

Choi

et al. 2021

J. Korean Phys. Soc.

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Failure of surface modification 3D printed polymer materials by UV/ozone irradiation

Korkut

Darıcık

Aktitiz

et al. 2023

Engineering Failure Analysis

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Effects of UV-ozone treatment on the electronic structures of F8BT and PFO polymeric thin films

Cited by 6 publications

References 25 publications

Thickness Dependence of MoO₃ Hole Injection Layer on Energy-Level Alignment with NPB Hole Transport Layers in OLEDs

Thickness Dependence of MoO₃ Hole Injection Layer on Energy-Level Alignment with NPB Hole Transport Layers in OLEDs

Electronic structure of P3HT film oxidized by ultraviolet–ozone treatment

Failure of surface modification 3D printed polymer materials by UV/ozone irradiation

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Effects of UV-ozone treatment on the electronic structures of F8BT and PFO polymeric thin films

Cited by 6 publications

References 25 publications

Thickness Dependence of MoO3 Hole Injection Layer on Energy-Level Alignment with NPB Hole Transport Layers in OLEDs

Thickness Dependence of MoO3 Hole Injection Layer on Energy-Level Alignment with NPB Hole Transport Layers in OLEDs

Electronic structure of P3HT film oxidized by ultraviolet–ozone treatment

Failure of surface modification 3D printed polymer materials by UV/ozone irradiation

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Product

Resources

About

Thickness Dependence of MoO₃ Hole Injection Layer on Energy-Level Alignment with NPB Hole Transport Layers in OLEDs

Thickness Dependence of MoO₃ Hole Injection Layer on Energy-Level Alignment with NPB Hole Transport Layers in OLEDs