具有高效橙色和白色发射功能的砜基 HLCT 分子

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Liankun Ai, Shaogang Shen, Lu Zhou, Baolin Li, Ying Wang
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引用次数: 0

摘要

分子中的混合局域电荷转移(HLCT)态通过反向系统间交叉将高能三重激子转化为单重激子,为实现 100% 的激子利用率开辟了新途径。在这项工作中,我们以 BTOBF 骨架为受体,以吩噻嗪(PTZ)、吩嗪(PXZ)和 9,9-二甲基-9,10-二氢吖啶(DMAC)为供体,设计并合成了三种无π桥的 D-A 型 HLCT 材料:PTZ-BTOBF、PXZ-BTOBF 和 DMAC-BTOBF。这些分子具有 HLCT 激发态特性,可发射绿光至橙色光,并表现出适度的 PLQY。我们制造了一系列绿光到橙光的 OLED 器件,实现了最高 4.99% 的 EQE 和最低 3.05 V 的开启电压。此外,通过调整掺杂浓度,我们还成功制备了单发射极 WOLED,其 EQE 为 1.82%,CIE 坐标为(0.30, 0.35)。该结果表明,用 HLCT 分子构建的 WOLED 效果良好,具有实际应用的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Sulfone-Based HLCT Molecules with Efficient Orange and White Emission

Sulfone-Based HLCT Molecules with Efficient Orange and White Emission
The hybrid local charge transfer (HLCT) state in the molecule opens up new avenues for achieving 100% exciton utilization by transforming high-energy triplet excitons into singlet excitons through reverse intersystem crossing. In this work, we designed and synthesized three D–A type HLCT materials without a π-bridge, PTZ-BTOBF, PXZ-BTOBF, as well as DMAC-BTOBF, using the BTOBF skeleton as the acceptor and phenothiazine (PTZ), phenoxazine (PXZ), and 9,9-dimethyl-9,10-dihydroacridine (DMAC) as donors. The molecules have HLCT excited-state characteristics, allowing for green to orange light emissions and exhibiting moderate PLQY. We fabricated a series of green to orange OLED devices and achieved the highest EQE of 4.99% and the lowest turn-on voltage of 3.05 V. Furthermore, by adjusting the doping concentration, single-emitter WOLEDs have been successfully fabricated and achieved an EQE of 1.82% with CIE coordinates of (0.30, 0.35). The result demonstrates a decent WOLED constructed with an HLCT molecule, which may have potential for practical application.
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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
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