Moon Kee Choi
Moon Kee Choi 蔚山国立科学技术院，副教授 Ulsan National Institute of Science and Technology， Associate Professor
Moon Kee Choi 是韩国蔚山国立科学技术院（Ulsan National Institute of Science and Technology，UNIST）材料科学与工程系副教授。 她目前的研究主要集中在高分辨率和可拉伸光电器件的开发，包括基于量子点和钙钛矿的发光二极管，以及这些器件在皮肤贴附式显示、生物医学电子器件和软体机器人系统中的集成应用。 Moon Kee Choi is an Associate professor in Department of Materials Science and Engineering of Ulsan National Institute of Science and Technology (UNIST). She received her B.S. (2010) and Ph.D (2016) in Chemical and Biological Engineering from Seoul National University, under the supervisionof Prof. Dae-Hyeong Kim. She subsequently conducted postdoctoral research at UC Berkeley, focusing on biomaterial based soft robotics. Her current research focuses on the development of high-resolution and stretchable optoelectronic devices, including quantum-dot- and perovskite-based light-emitting diodes, as well as their integration into skin-attachable displays, biomedical electronics, and soft robotic systems. 题目 基于转印技术的高分辨率与可变形量子点发光二极管
摘要： 随着下一代电子系统对显示器提出的要求不断提高，不仅需要高效率和高分辨率，还需要具备机械可变形性，量子点发光二极管（Quantum Dot Light-Emitting Diodes，QLEDs）逐渐成为一种具有前景的平台。量子点（Quantum Dots，QDs）具有优异的光致发光量子效率、宽色域以及窄发射带宽，使其非常适合用于超高清显示。 然而，在实现高器件效率和机械可变形性的同时，构筑高密度、高分辨率的 RGB 子像素图案仍然是一个重大挑战。在本次报告中，我将介绍一种通过先进转移印刷策略实现的高分辨率且高效率的 QLEDs。该方法通过在尽量减少溶剂接触的条件下精确转移基于量子点的发光层，获得了高密度堆积的纳米晶薄膜，并有效降低了界面缺陷和漏电流，从而显著提升了外量子效率。 在此基础上，我还将进一步介绍超薄且本征可拉伸的 QLEDs，其在大幅度机械形变条件下仍能保持高亮度和高色纯度。这些可变形 QLEDs 使得多色、皮肤贴附式和形态自适应显示成为可能，为实现远超传统可折叠和可卷曲技术的显示形态提供了一条可行路径。 Title High-definition & deformable quantum dot light-emitting diodes via transfer printing Abstract： As next-generation electronic systems increasingly require displays that are not only highly efficient and high-resolution but also mechanically deformable, quantum dot light-emitting diodes (QLEDs) have emerged as a promising platform. Quantum dots (QDs) offer outstanding photoluminescence quantum yield, a wide color gamut, and narrow emission bandwidths, making them ideal for ultrahigh-definition displays. However, realizing densely packed, high-resolution RGB sub-pixel patterns together with high device efficiency and mechanical deformability remains a major challenge. In this presentation, I will introduce high-definition and highly efficient QLEDs enabled by advanced transfer-printing strategies. By precisely transferring QD-based emissive layers with minimal solvent exposure, this approach achieves densely packed nanocrystal films with reduced interfacial defects and leakage currents, leading to significantly enhanced external quantum efficiency. Building on this platform, I will further present ultrathin and intrinsically stretchable QLEDs that maintain high brightness and color purity under large mechanical deformation. These deformable QLEDs enable new classes of multicolor, skin-attachable, and shape-adaptive displays, providing a pathway toward display form factors that extend well beyond conventional foldable and rollable technologies. |
