当前位置: X-MOL 学术ACS Appl. Mater. Interfaces › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Approaching Efficient and Narrow RGB Electroluminescence from D–A-Type TADF Emitters Containing an Identical Multiple Resonance Backbone as the Acceptor
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-07-21 , DOI: 10.1021/acsami.1c09743
Feng Huang 1 , Kai Wang 1 , Yi-Zhong Shi 1 , Xiao-Chun Fan 1 , Xiang Zhang 1 , Jia Yu 1 , Chun-Sing Lee 2 , Xiao-Hong Zhang 1
Affiliation  

Highly twisted electron donor (D)–electron acceptor (A)-type thermally activated delayed fluorescence (TADF) emitters can achieve high efficiency while suffering from serious structural relaxations and broad emissions. Multiple resonance (MR)-type TADF emitters can realize narrow emission. However, until now, only a few efficient MR-emitting cores are reported and custom tunning of their emission color remains a major challenge in their wider applications. In this work, by combining the conventional TADF and MR-TADF designs, we demonstrate that color tuning and narrowing the spectral width of conventional TADF emission can be easily achieved simultaneously. We select a prototypical carbonyl (C═O)/N-based MR core as a backbone and attach it with D segments of different electron-donating abilities and numbers to obtain three different TADF emitters with emissions from sky blue to green and orange-red while maintaining the narrow emission of the original MR core. The corresponding sky blue, green, and orange-red organic light-emitting diodes achieve maximum external quantum efficiencies of 20.3, 27.3, and 26.3%, respectively, and narrow full widths at half-maximum all below 0.28 eV. These results provide a new molecular design strategy for developing narrowband TADF emitters with easily tunable emissions covering the full visible range.

中文翻译:

从包含相同多共振主干作为受体的 D-A 型 TADF 发射器接近高效和窄的 RGB 电致发光

高度扭曲的电子供体(D)-电子受体(A)型热激活延迟荧光(TADF)发射器可以实现高效率,同时遭受严重的结构松弛和宽发射。多谐振(MR)型TADF发射器可实现窄发射。然而,到目前为止,只有少数高效的 MR 发射核被报道,并且其发射颜色的定制调整仍然是其更广泛应用的主要挑战。在这项工作中,通过结合传统的 TADF 和 MR-TADF 设计,我们证明可以轻松地同时实现颜色调整和缩小传统 TADF 发射的光谱宽度。我们选择原型羰基 (C=O)/N 基 MR 核作为骨架,并将其与不同给电子能力和数量的 D 段连接,以获得三种不同的 TADF 发射器,发射从天蓝色到绿色和橙红色同时保持原始MR核心的窄发射。相应的天蓝色、绿色和橙红色有机发光二极管分别实现了 20.3%、27.3% 和 26.3% 的最大外量子效率,并且半高全宽均低于 0.28 eV。这些结果为开发窄带 TADF 发射器提供了一种新的分子设计策略,该发射器具有覆盖整个可见光范围的易于可调的发射。和橙红色有机发光二极管分别实现了 20.3、27.3 和 26.3% 的最大外量子效率,并且半高全宽均低于 0.28 eV。这些结果为开发窄带 TADF 发射器提供了一种新的分子设计策略,该发射器具有覆盖整个可见光范围的易于可调的发射。和橙红色有机发光二极管分别实现了 20.3、27.3 和 26.3% 的最大外量子效率,并且半高全宽均低于 0.28 eV。这些结果为开发窄带 TADF 发射器提供了一种新的分子设计策略,该发射器具有覆盖整个可见光范围的易于可调的发射。
更新日期:2021-08-04
down
wechat
bug