量子点LED显示研究进展:材料、封装涂层、图案化显示应用

Review of quantum dot-based LED display:materials,encapsulation coatings,patterned display applications

量子点(Quantum Dot,QD)作为一种新型发光材料,具有发光光谱窄、激发光谱宽、量子产率高及可溶液制备等优点,其制成的发光二极管(Light-emitting diode,LED)器件通过色转换过程可实现红、蓝及绿波段较窄的发射半波峰(<20 nm),色域范围超过120%NTSC,被视为下一代最有潜力的显示技术之一。然而,量子点材料的发光不稳定性、低出光效率与全彩化技术难题严重限制了量子点材料在高性能显示设备方面的应用。如何解决这些难题,实现稳定高效的量子点全彩化新型显示仍需进一步探索。本文总结了国内外对量子点材料改性、量子点材料封装方法、量子点涂层出光增强策略以及量子点图案化显示应用4个方面的研究进展,为进一步提升量子点LED显示技术提供有价值的参考。

As a new nanomaterial,quantum dot(QD)has lots of advantages,including narrow emission linewidth,broad absorption spectra,high photoluminescence quantum yield(PLQY)and solution-processed characteristic and so on.Recently,integrating quantum dots(QDs)with LED chips to adjust the emission spectra is one of the most promising technique in display applications,successfully achieving a wide-color gamut over 120%NTSC by color conversion processes(the full width at half maximum of red,green,and blue spectra smaller than 20 nm).However,the application of quantum dots in high-performance display devices is severely limited by their poor luminous stability,low luminous efficiency,and full-color technology problems.How to solve these issues and achieve stable and efficient new quantum dot full-color display still needs further exploration.This paper reviews the research progress of quantum dot modification,quantum dot packaging method,quantum dot coating fluorescence enhancement strategy and quantum dot patterned display application at home and abroad,analyzes the progress of quantum dot LED devices from the aspects of packaging coating,fluorescence enhancement strategy and patterned quantum dot manufacturing method,and provides valuable information for the potential of quantum dot LED based display technology in the future.