OLED器件发光层用精细有机材料纯度提升技术研究

Research on the Technology for Improving the Purity of Fine Organic Materials Used in the Light-Emitting Layer of OLED Devices

摘要

针对OLED器件发光层精细有机材料内微量杂质导致的器件发光效率衰减、寿命缩短、色偏等问题，采用合成工艺优化、多步纯化联用等组合技术，通过调节合成反应参数、筛选纯化工艺体系、搭建痕量杂质检测平台，实现从实验室合成到工业化纯化的有机发光材料全流程纯度提升，目标。结果表明，经重结晶-柱层析-真空升华三步纯化组合工艺处理后，可将OLED发光层核心有机材料纯度提至99.99%以上，把金属离子杂质含量降到1 ppm以下，把有机杂质含量降到5 ppm以下；调整后的制备工艺可有效压制副反应产生，从源头减少杂质生成。

Abstract

To address the issues such as the attenuation of device luminous efficiency, shortened lifespan, and color deviation caused by trace impurities in the fine organic materials of OLED devices, and to achieve high-purity production of organic luminescent materials and their industrialization, a combined technology of raw material purification, optimization of synthesis processes, multi-step purification, and precise impurity detection was employed for research. The synthesis reaction parameters were adjusted, the purification process system was selected, and a trace impurity detection platform was established to complete the entire process of organic luminescent material purity improvement from laboratory synthesis to industrialization. After the combined purification process of recrystallization, column chromatography, and vacuum sublimation, the purity of the core organic material of the OLED luminescent layer can be increased to over 99.99%, the content of metal ion impurities can be reduced to below 1 ppm, and the content of organic impurities can be reduced to below 5 ppm. The adjusted preparation process can effectively suppress the occurrence of side reactions and reduce impurity generation at the source.

关键词

OLED器件 / 发光层 / 精细有机材料 / 纯度提升 / 纯化工艺

Key words

OLED devices / Light-emitting layer / Fine organic materials / Purity improvement / Purification process

参考文献

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