有机发光二极管显示屏的喷墨打印研究与展望

近年来,有机发光二极管(OLED)被广泛应用于智能手机等中小尺寸显示屏,并逐步进入电视等大尺寸显示领域和照明市场。随着OLED平板显示新时代的到来,对显示屏的彩色化与图案化研究提出了更高要求。与传统真空蒸镀技术相比,喷墨打印技术更容易实现大面积器件的彩色化和复合功能材料的图案化,且工艺简单,成本低廉,并可进行柔性器件加工。本文综述了采用喷墨打印技术制备OLED显示屏的研究现状,并系统介绍了喷墨打印设备的发展历程,通过优化bank结构提高显示屏的分辨率,优化墨水配方及组成配比抑制喷墨液滴的“咖啡环”效应,从而提高显示器发光均匀性,最后对国内外该技术产业进行了概述与展望。

Progress of OLEDs prepared by inkjet printing

In recent years,OLED(Organic Light Emitting Diode)devices have been widely used in small-and medium-sized displays,and have gradually been popularized in large area display applications,such as in TVs and lighting.With the continuous development of organic light-emitting technology,higher requirements drive research on the color and pattern of OLED devices.Compared with the traditional vacuum evaporation process,inkjet printing technology easily colors large-area devices and patterns composite functional materials.It is also simple to implement,low in cost and has a more flexible process.In this paper,the current progress of inkjet-printed OLED devices is reviewed.Furthermore,this paper systematically introduces the development of inkjet printing equipment,by optimizing bank structures to improve the resolution of their display screens,by optimizing the ink formulation and composition ratio to suppress the coffee ring effect of inkjet droplets,and improves the uniformity of display luminescence.Finally,this paper summarizes and provides prospects for the future development of this technology at home and abroad.