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Recent advances in white organic light-emitting diodes

机译：白色有机发光二极管的最新进展

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摘要

White organic light-emitting diodes (WOLEDs) are emerging as the most promising technology for the next-generation display and solid-state lighting applications owing to their merits of being high-efficiency, low-cost, easy-flexibility, and environment-friendly. In this review, we will discuss the fundamental working principles, the basics of exciton manipulation concepts, the architecture designs within the emissive region, the approaches to relieve the efficiency roll-off at high luminance, and the remaining challenges in all phosphorescent and hybrid WOLEDs. A comprehensive understanding of the exciton manipulation concept and the key factors dominating the WOLED performances is of great importance for advancing technological applications. We aim to provide an overview on the recent advances in WOLEDs with emphasis specifically on: (a) principles on how to manipulate singlet and triplet excitons for maximizing the exciton utilization efficiency; (b) exciton manipulation in all phosphorescent WOLEDs and hybrid WOLEDs based on conventional fluorophors or thermally activated delayed fluorescent emitters by finely designing the emitting layer architectures and selecting matched materials; and (c) strategies to mitigate the efficiency roll-off including the utilization of effective charge and exciton-confined structures, decreasing the exciton lifetime, reducing molecular aggregation, and broadening the exciton recombination zone.
机译：白色有机发光二极管（WOLED）由于具有高效，低成本，易弯曲且环保的优点，正在成为下一代显示器和固态照明应用中最有前途的技术。在这篇综述中，我们将讨论基本的工作原理，激子操纵概念的基础，发射区域内的体系结构设计，缓解高亮度下效率下降的方法，以及所有磷光和混合WOLED的剩余挑战。对激子操纵概念和支配WOLED性能的关键因素的全面理解对于推进技术应用至关重要。我们旨在概述WOLED的最新进展，重点是：（a）如何操纵单重态和三重态激子以最大化激子利用效率的原理； （b）通过精心设计发射层架构并选择匹配的材料，在所有基于常规荧光团或热激活延迟荧光发射器的磷光WOLED和混合WOLED中进行激子操纵； （c）缓解效率下降的策略，包括利用有效电荷和激子约束结构，缩短激子寿命，减少分子聚集并拓宽激子复合区。

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  • 来源
    《Materials Science & Engineering》 |2016年第9期|1-42|共42页
  • 作者

    Zhongbin Wu; Dongge Ma;

  • 作者单位

    State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, University of Chinese Academy of Sciences, Changchun 130022, People's Republic of China;

    State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, University of Chinese Academy of Sciences, Changchun 130022, People's Republic of China,Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    White organic light-emitting diodes; Exciton management; Phosphorescent; Hybrid; Efficiency roll-off;

    机译：白色有机发光二极管;激子管理;磷光混合动力效率下降;

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