紫外辐射对OLED的影响及光老化亮度衰减模型研究

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL

Physical Chemistry Chemical Physics Pub Date : 2025-04-15 DOI:10.1039/d5cp00664c

Lulu Zhou, Zhanhan Hu, Wei Shi, Yixiao Zhang, Yangyang Zhu, Yi Liao, Yachen Xu, Jialu Gu, Weixia Lan, Bin Wei

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引用次数: 0

摘要

我们研究了有机发光二极管（oled）在不同紫外（UV）照射强度下的降解性能，并证明拉伸指数衰减（SED）模型适用于电老化，也适用于光老化中的发光-时间曲线。这样，在低紫外光照下获得的OLED寿命可以与在高光照下获得的寿命相匹配。我们还证明了紫外线辐射如何影响ITO/空穴传输层的界面，从而导致其降解。这是通过单载流子器件迁移率的变化和紫外照射前后薄膜的XPS表征来阐明的。这些发现揭示了OLED在光老化中的外部行为和内部机制，为提高有机电子器件的稳定性提供了可靠的研究方向。

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Research on the Influence of Ultraviolet Radiation on OLED and the Luminance Attenuation Model of Light Aging

We investigated the degradation performance of organic light-emitting diodes (OLEDs) under different ultraviolet (UV) irradiation intensities and demonstrated that the stretched exponential decay (SED) model, applicable in electrical aging, is also suitable for describing the luminance-time curves in photoaging. In this way, OLED lifetime acquired at low UV illumination could be fitted with that obtained at high illumination. We also demonstrated how UV radiation affects the interface at ITO/hole transporting layer, which led to its degradation. This was elucidated through changes in the mobility of single-carrier devices and XPS characterization of the films before and after UV irradiation. These findings reveal the external behavior and internal mechanism of OLED in light aging, providing a reliable research direction for enhancing the stability of organic electronic devices.

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来源期刊

Physical Chemistry Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

5.50

自引率

9.10%

发文量

2675

审稿时长

2.0 months

期刊介绍： Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.