Naphthalene-Arylamine starburst architectures: Novel hole transport materials for enhanced OLED performance

IF 2.7 4区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Organic Electronics Pub Date : 2024-11-09 DOI:10.1016/j.orgel.2024.107160

Jinxin Miao , Zhiyuan Chen , Peng Xu , Xudong Cao , Kai Xu , Senqiang Zhu , Rui Liu , Chong Li , Guangliang Song

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Abstract

The excellent hole transfer material (HTM) is beneficial to improve the stability of the device, reduce turn-on voltage(V_on) and make full use of the potential performance of the developed emissive materials. In this work, we designed and synthesized four HTMs with triarylamine and naphthalene compounds - SHT1- SHT4. The characteristics of these four compounds were investigated by TGA, DSC. UV–vis absorption and photoluminescence spectra. These four HTMs all exhibit excellent hole transmission capability for their high triplet energy levels (E_T), outstanding thermal property, morphological stabilities and appropriate highest occupied molecular orbital (HOMO) energy levels with emissive layer (EML). Four top-emission blue OLEDs with SHT1 - SHT4 as hole transport layer (HTL) were fabricated and show good electroluminescence (EL) property. The results show that the device incorporating SHT3 exhibit the best device performances with a low V_on of 2.79 V, external quantum efficiency (EQE_max) of 19.7 %, highest current efficiency (CE_max) and highest Power efficiency (PE_max) of 8.86 cd A⁻¹ and 9.05 lm/W, respectively.

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萘-芳胺星爆结构：提高 OLED 性能的新型空穴传输材料

优良的空穴传输材料（HTM）有利于提高器件的稳定性，降低开启电压（Von），充分发挥所开发的发光材料的潜在性能。在这项工作中，我们设计并合成了四种含有三芳基胺和萘化合物的 HTM - SHT1- SHT4。我们通过 TGA、DSC、UV-vis 吸收和光致发光等方法研究了这四种化合物的特性。紫外可见吸收光谱和光致发光光谱。这四种 HTM 因其高三重能级（ET）、出色的热性能、形态稳定性以及与发射层（EML）相匹配的最高占位分子轨道（HOMO）能级，均表现出卓越的空穴传输能力。以 SHT1 - SHT4 作为空穴传输层（HTL）的四种顶部发射蓝色 OLED 制作完成，并显示出良好的电致发光（EL）特性。结果表明，采用 SHT3 的器件具有最佳的器件性能，其 Von 值低至 2.79 V，外部量子效率 (EQEmax) 为 19.7 %，最高电流效率 (CEmax) 和最高功率效率 (PEmax) 分别为 8.86 cd A-1 和 9.05 lm/W。

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来源期刊

Organic Electronics 工程技术-材料科学：综合

CiteScore

6.60

自引率

6.20%

发文量

238

审稿时长

44 days

期刊介绍： Organic Electronics is a journal whose primary interdisciplinary focus is on materials and phenomena related to organic devices such as light emitting diodes, thin film transistors, photovoltaic cells, sensors, memories, etc. Papers suitable for publication in this journal cover such topics as photoconductive and electronic properties of organic materials, thin film structures and characterization in the context of organic devices, charge and exciton transport, organic electronic and optoelectronic devices.