近日，上海大学杨绪勇团队报道了像素化量子点超晶格LED。该项研究成果发表在2026年4月15日出版的《自然》杂志上。

量子点（QD）超晶格具有不同于无序固体的集体光电子性质，但由于难以实现空间上定义明确、结构上连贯有序的薄膜，其在高分辨率显示器件中的集成应用一直未能实现。

研究组报告了一种可扩展的策略，用于制备图案化的钙钛矿量子点（PeQD）超晶格薄膜阵列，该阵列兼具面内长程有序、垂直限域以及精确的空间图案化特征。通过采用配体-氟化物共稳定方法，设计具有稳健表面终端的菱形十二面体CsPbBr₃纳米晶，利用毛细管液桥限域组装，引导形成六方密堆积的超晶格薄膜。这些超晶格薄膜表现出降低的能量无序度和增强的电子耦合。当集成到发光二极管（LED）中时，电驱动的PeQD超晶格实现了30.9%的外量子效率、117,144 cd m^-2的高亮度以及高达每英寸5,080像素的像素密度。

这些器件在100 cd m^-2亮度下，推算出的工作半衰期（T₅₀）为12,411小时——比先前报道的图案化PeQD LED长超过1,000倍。此外，研究组展示了将图案化超晶格直接集成到商用薄膜晶体管背板上，构建出具有全灰阶控制和视频播放能力的1.85英寸有源矩阵显示器。这些成果确立了胶体量子点超晶格作为下一代高分辨率、稳定且高效的钙钛矿显示器的可行材料平台。

附：英文原文

Title: Pixelated quantum-dot superlattice LEDs

Author: Zhang, Chengxi, Zeng, Qingsen, Li, Hui, Guo, Renjun, Yu, Yue, Dai, Linjie, Turyanska, Lyudmila, Liu, Zirui, Dai, Jun, Yang, Yingguo, Zhao, Yue, Lu, Jun, Wang, Lin, Kong, Lingmei, Sum, Tze Chien, Wu, Yuchen, Lee, Tae-Woo, Yang, Xuyong

Issue&Volume: 2026-04-15

Abstract: Quantum dot (QD) superlattices offer collective optoelectronic properties distinct from disordered solids1,2,3,4, but their integration into high-resolution display devices remains elusive because of difficulties in achieving spatially defined, structurally coherent thin films. Here we report a scalable strategy for fabricating pixelated perovskite QD (PeQD) superlattice thin-film arrays that feature in-plane long-range order, vertical confinement and precise spatial patterning. By engineering rhombic dodecahedral CsPbBr3 nanocrystals with robust surface termination by a ligand-fluoride co-stabilization approach, we direct the formation of hexagonally close-packed superlattice films using capillary liquid-bridge confined assembly. These superlattice films exhibit reduced energetic disorder and enhanced electronic coupling. When integrated into light-emitting diodes (LEDs), the electrically driven PeQD superlattices yield an external quantum efficiency of 30.9%, high luminance of 117,144cdm2 and pixel densities of up to 5,080 pixels per inch. The devices show an extrapolated operational half-lifetime (T50) of 12,411h at 100cdm2—more than 1,000-fold longer than previously reported pixelated PeQD LEDs. Moreover, we demonstrate the direct integration of patterned superlattices onto a commercial thin-film transistor backplane to construct a 1.85-inch active-matrix display with full greyscale control and video playback ability. These results establish colloidal QD superlattices as a viable material platform for next-generation high-resolution, stable and efficient perovskite displays.

DOI: 10.1038/s41586-026-10392-z

Source: https://www.nature.com/articles/s41586-026-10392-z