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
期刊介绍: ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/​Abstracted: Web of Science SCIE Scopus CAS INSPEC Portico
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