Jiwoong Yang
Jiwoong Yang 大邱庆北科学技术院，副教授 Daegu Gyeongbuk Institute of Science and Technology，Associate professor
杨教授现任韩国大邱庆北科学技术院（Daegu Gyeongbuk Institute of Science and Technology，DGIST）化学工程方向教授，于2019年加入DGIST。2011年，他以最优等成绩（Summa Cum Laude）获得首尔大学（Seoul National University，SNU）化学与生物工程学士学位，并于2016年在SNU获得博士学位，导师为许泰焕（Taeghwan Hyeon）教授。博士毕业后，他于2017–2019年在美国劳伦斯伯克利国家实验室（Lawrence Berkeley National Laboratory，LBNL）从事博士后研究，在郑海美（Haimei Zheng）博士指导下，开展原位液体池透射电子显微镜（in situ liquid-cell TEM）技术的开发与应用，用于直接观察液体环境中纳米尺度结构演变，并研究固–液界面处的非均一性与涨落行为。 杨教授课题组主要致力于量子尺度半导体纳米材料的设计与合成，尤其是用于显示器件的胶体量子点及相关纳米晶材料。其核心研究目标在于建立纳米晶形成路径、表面/界面化学与器件光电性能之间的机理关联。课题组将材料合成与先进表征技术相结合，包括原位TEM以及光学和X射线光谱手段，实时追踪结构演化并关联其功能特性。研究强调将机理层面的认识转化为高稳定性材料体系与器件架构，研究兴趣还包括可规模化加工、高分辨率图案化与转移策略等面向下一代光电子器件的关键技术，以及纳米晶驱动的光催化和光电化学反应。 迄今为止，杨教授已发表约85篇同行评议学术论文。作为通讯作者，他在多种国际顶级期刊上主持并发表多项重要成果，包括 Nature Electronics（2024）、Nature Photonics（2024）、Matter（2025） 以及 Advanced Materials（2025、2026） 等。他曾获 POSCO科学奖学金（2020）、Miwon青年科学家奖（2020），并获得 DGIST最佳教学奖（2023） 和 DGIST最佳学术奖（2025）。此外，他还担任 Nature Photonics、Science Advances、JACS、ACS Nano、Nano Letters、Advanced Materials 等期刊的审稿人。 在DGIST，杨教授领导一支跨学科研究团队，研究方向涵盖纳米化学、先进表征与器件工程的交叉领域，并积极指导研究生和博士后科研人员。
Jiwoong Yang is an Associate Professor in the Department of Energy Science and Engineering (Chemical Engineering Track) at Daegu Gyeongbuk Institute of Science and Technology (DGIST), Republic of Korea. He joined DGIST in 2019. He received his B.S. degree (2011, Summa Cum Laude) and Ph.D. degree (2016) in Chemical and Biological Engineering from Seoul National University (SNU) under the supervision of Prof. Taeghwan Hyeon. After his Ph.D., he conducted postdoctoral research at Lawrence Berkeley National Laboratory (LBNL, 2017-2019). At LBNL, he worked under the guidance of Dr. Haimei Zheng, developing and applying in situ liquid-cell transmission electron microscopy (TEM) to directly visualize nanoscale transformations in liquids and to investigate heterogeneity and fluctuations at solid–liquid interfaces. Prof. Yang’s group focuses on design and synthesis of quantum-sized semiconductor nanomaterials—particularly colloidal quantum dots and related nanocrystals—for display applications. A central objective is to establish mechanistic links between nanocrystal formation pathways, surface/interface chemistry, and functional optoelectronic performance. The group integrates materials synthesis with state-of-the-art characterization, including in situ TEM together with optical and X-ray spectroscopy, to follow structure evolution and correlate it with properties. His work emphasizes translating mechanistic insight into robust materials and device architectures, with interests that include scalable processing and high-resolution patterning/transfer strategies for next-generation optoelectronics, as well as nanocrystal-enabled photocatalytic and photoelectrochemical reactions. His have published about 85 peer-reviewed papers. He has led multiple studies as a corresponding author in leading journals, including corresponding-author papers in Nature Electronics (2024), Nature Photonics (2024), Matter (2025), and Advanced Materials (2025, 2026), among other high-impact venues. His honors include the POSCO Science Fellowship (2020) and Miwon Young Scientist Award (2020), as well as DGIST Best Teaching Award (2023) and DGIST Best Academic Award (2025). He also contributes to the community as a peer reviewer for journals including Nature Photonics, Science Advances, JACS, ACS Nano, Nano Letters, and Advanced Materials. At DGIST, he leads an interdisciplinary team at the interface of nanochemistry, characterization, and device engineering, and mentors students and postdoctoral researchers. 题目 用于稳定与高性能显示应用的量子点机理设计
摘要： 量子点（Quantum dots，QDs）因其可调带隙、宽色域和高亮度，在显示技术中展现出巨大潜力，但运行稳定性和工艺兼容性仍是其实现实际应用的关键障碍。本文提出了一种机制驱动的设计策略，将量子点的合成过程、表面/界面化学以及失效与降解路径，与显示应用相关的性能指标系统性地联系起来。 通过原位 X 射线散射技术，我们捕捉到胶体纳米晶生长过程中相变演化和形成路径的动力学特征，为调控结构非均一性和缺陷分布提供了合成层面的控制手段，而这些因素最终决定了器件的光电性能与可靠性 [1,2]。作为补充，原位液相透射电子显微镜（TEM）并非用于完整成核过程的观察，而是用于在反应环境下追踪结构与化学演化；结合原位 X 射线分析，该方法揭示了湿度及环境因素驱动的降解机制，并阐明了钝化化学如何重定向失效路径，从而提升材料稳定性 [3–5]。 最后，本文讨论了这些材料层面的机制如何转化为显示系统集成方案，包括高分辨率量子点显示器 [6,7]、可拉伸量子点显示器 [8,9] 以及交互式显示系统 [10,11]。总体而言，这一机制视角超越了经验性优化，为实现高性能、长寿命的新一代量子点显示技术提供了可推广的设计路径。 Title Nonlinear Light Field Manipulation via Ferroelectric Nematic Microstructures
Abstract： Quantum dots (QDs) offer tunable bandgap, wide color gamut, and high brightness for display technologies, yet operational stability and process compatibility remain key barriers to practical deployment. Here I present a mechanistic design strategy that connects synthesis, surface/interface chemistry, and degradation pathways to display-relevant performance metrics. In situ X-ray scattering captures kinetic signatures of phase evolution and formation pathways during colloidal nanocrystal growth, providing synthesis handles to control structural heterogeneity and defect landscapes that ultimately influence optoelectronic performance and reliability [1,2]. Complementarily, in situ liquid-phase TEM—used to track structural and chemical evolution under reactive environments rather than complete nucleation—together with in situ X-ray analysis reveals moisture- and environment-driven degradation mechanisms and clarifies how passivation chemistry redirects failure pathways to improve material stability [3–5]. Finally, I discuss how these materials-level rules translate to display integration, including high-definition QD-displays [6,7], stretchable QD-displays [8,9], and interactive displays [10,11]. Collectively, this mechanistic perspective moves beyond empirical optimization and provides generalizable pathways toward durable, high-performance next-generation QD display technologies.
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