Liang Jie, Chu Manman, Zhou Zhonghao, Yan Yongli, Zhao Yong Sheng
Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Nano Lett. 2020 Oct 14;20(10):7116-7122. doi: 10.1021/acs.nanolett.0c02378. Epub 2020 Sep 25.
Laser displays, which offer wide achievable color gamut and excellent color rendering, have emerged as a promising next-generation display technology. Constructing display panels composed of pixelated microlaser arrays is of great significance for the actualization of laser displays in the flat-panel sector. Here, we report microscale light-emitting electrochemical cell (LEC) arrays that operate as both optically pumped lasers and electroluminescence devices, which can be applied as self-emissive panels for high quality displays. Optically pumped red, green, and blue laser emissions were achieved in individual circular microcells consisting of corresponding conjugated polymers and electrolytes, suggesting that the microstructures can act as resonators for coherent outputs. As-prepared microstructures possess a narrowed recombination region, which dramatically increases the current density by 3 orders of magnitude under pulsed operation, compared with the corresponding thin-film devices, representing a promising solution-processed device platform for electrical pumping. Under programmable electrical excitation, both static and dynamic displays were demonstrated with such microscale LEC arrays as display panels. The prominent performance of the demonstrated structures (microlaser arrays embedded in LEC devices) provide us deep insight into the concepts and device constructions of electrically driven laser displays.
激光显示器具有广泛的可实现色域和出色的色彩还原能力，已成为一种很有前景的下一代显示技术。构建由像素化微激光阵列组成的显示面板对于在平板领域实现激光显示器具有重要意义。在此，我们报告了微尺度发光电化学电池（LEC）阵列，其既作为光泵浦激光器又作为电致发光器件工作，可应用于高质量显示器的自发光面板。在由相应共轭聚合物和电解质组成的单个圆形微电池中实现了光泵浦红、绿、蓝激光发射，这表明这些微结构可作为相干输出的谐振器。所制备的微结构具有变窄的复合区域，与相应的薄膜器件相比，在脉冲操作下电流密度显著增加了3个数量级，这代表了一种有前景的用于电泵浦的溶液处理器件平台。在可编程电激发下，以这种微尺度LEC阵列作为显示面板展示了静态和动态显示。所展示结构（嵌入LEC器件中的微激光阵列）的卓越性能为我们深入了解电驱动激光显示器的概念和器件结构提供了帮助。
