印刷OLED显示用发光材料进展

Progress on Luminescent Materials for Printed OLED Display

随着有机发光二极管(OLED)在显示领域的广泛应用,面向低成本、大面积的OLED器件制备技术不断涌现。相较于传统真空蒸镀技术,印刷显示技术具有工艺简便、材料利用率高、可制备大面积柔性器件等优势,被认为是下一代显示器件主流制备技术之一。印刷OLED技术是一项综合了材料、器件、工艺、设备等诸多方面的系统工程,是典型的学科交叉、领域合作的新兴技术。发光材料是OLED显示面板制造所用的核心材料,特别是在印刷制备工艺中,材料的发光效率、成膜性、稳定性等决定了最终产品的质量。回顾OLED显示技术的发展趋势,概括了OLED器件结构、工作原理等基础理论,阐述了印刷制备工艺的特点及其存在的关键问题。重点综述了印刷OLED显示用发光材料的发光机理及研究进展,展望了印刷OLED显示用发光材料存在的问题和未来发展方向。

With the extensive applications of organic light-emitting diode(OLED)in the display field,fabrication technologies for low-cost and large-area OLED devices are rapidly emerging.Compared with traditional vacuum evaporation technology,printed display technology has some advantages,including simple process,high material utilization,preparing large-area and flexible device,etc.It is considered as one of the mainstream technologies for preparing new display devices.Printed OLED technology is a comprehensive system engineering of materials,devices,processes,equipments and others.It is a typical emerging technology of interdisciplinary and field cooperation.Luminescent materials are the core materials for devices manufacturing,especially for printing process.The quality of the final products is determined by the properties of luminescent materials,such as the luminous efficiency,film-forming property and stability.The development tendency of OLED display technologies was introduced.The basic theories of structure and working mechanism to OLED devices were summarized.Simultaneously,the characteristics and key problems for printed OLED technology were described.And the luminescent mechanism and research progress of printed OLED materials were reviewed.At last,the key scientific problems and development direction of printed OLED materials were prospected.