高效,长寿命和可调色的混合WOLED使用复合体与电压依赖的单体和聚合物发射
Yangyang Xin1, Mao Mao2,3, Shuo Xu2
1Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 21, 2025
概括
本研究介绍了一种简单,高性能,可调色的白色有机发光二极管 (CT-WOLED),用于动态模拟阳光. 该设备提供效率,长寿命和广泛的颜色范围,简化了昼夜节律应用的复杂结构.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 光物理学的光学物理学
背景情况:
- 可调色的白色有机发光二极管 (CT-WOLED) 对于需要动态颜色调整的应用至关重要,例如模拟自然阳光以调节昼夜节律.
- 现有的CT-WOLED,特别是三色设备,往往遭受低于最佳性能和复杂的制造过程.
- 需要简化CT-WOLED结构,实现高效率,延长运行稳定性和广泛的色调能力.
研究的目的:
- 开发一种新的,简化的三色CT-WOLED,能够动态模拟阳光.
- 为了实现高光效率,延长运行寿命,在简单的设备架构中实现广泛的色调范围.
- 为了利用新合成的复合物来实现电压依赖的排放调节.
主要方法:
- 制造一种三色CT-WOLED,其中包含一种新的复合物和一种蓝色延迟光材料.
- 描述设备的电特性,包括在不同电压下的颜色坐标 (CIE) 和相关的色温 (CCT).
- 评估设备的性能指标:外部量子效率 (EQE),发光率衰减和运行寿命.
主要成果:
- 开发的CT-WOLED显示了简化的结构,同时实现了高效率 (高达28.8%的EQE) 和超长的运行寿命 (21,144小时在100cdm-2).
- 该设备显示了广泛的色调范围,CIE坐标从2628 K的 (0.502,0.474) 转移到14860 K的 (0.211,0.334),电压从2.6 V增加到8 V.
- 复合体使电压依赖的绿色到红色光发射成为可能,简化了设备设计,并使动态色彩控制成为可能.
结论:
- 一种新的,结构简单的三色CT-WOLED已经成功演示,在性能和设计简单性方面取得了显著的进步.
- 该设备在广泛的范围内有效模拟阳光颜色,使其适用于对昼夜节律敏感的应用.
- 使用具有双态排放特性的复合物为开发高效,稳定的可调色照明解决方案提供了有前途的途径.
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