Organic color-conversion media for full-color micro-LED displays,Journal of the Society for Information Display

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Organic color-conversion media for full-color micro-LED displays
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2021-07-26 , DOI: 10.1002/jsid.1072
Shou‐Cheng Dong _{1,

2} , Yibin Jiang ₂ , Ching W. Tang _{1,

2}

Affiliation

We developed green and red color-conversion medium (CCM) films for applications in VR/AR microdisplays. These CCM films comprise a host–dopant composition, where the host DMP is a perylene-based molecule with an absorption coefficient of nearly 2.0 × 10⁵ at 458 nm, the peak absorption closely matching the emission from blue LEDs. DMP was specially designed to have large steric substituents to minimize intermolecular aggregation and to preserve monomeric emissions. Thin CCM films can achieve peak blue-light absorption of over 99.9% with a mere 500-nm thickness. Green and red CCM films with PLQYs of 44% and 58% using DMQA and DBP as dopants, respectively, have been demonstrated. With an ultra-thin silicon nitride shadow mask, high-resolution CCM arrays of 2000 ppi have also been demonstrated.

中文翻译：

用于全色微型 LED 显示器的有机颜色转换介质

我们开发了用于 VR/AR 微型显示器的绿色和红色颜色转换介质 (CCM) 薄膜。这些 CCM 薄膜包含主体 - 掺杂剂组合物，其中主体 DMP 是基于苝的分子，在 458 nm 处的吸收系数接近 2.0 × 10 ⁵，峰值吸收与蓝色 LED 的发射非常匹配。DMP 专门设计为具有大的空间取代基，以最大程度地减少分子间聚集并保持单体排放。薄的 CCM 薄膜可以在仅 500 纳米的厚度下实现超过 99.9% 的峰值蓝光吸收。分别使用 DMQA 和 DBP 作为掺杂剂的绿色和红色 CCM 薄膜，PLQY 分别为 44% 和 58%。使用超薄氮化硅荫罩，还展示了 2000 ppi 的高分辨率 CCM 阵列。

更新日期：2021-07-26

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