Xinyi Yu

Xinyi Yu

香港科技大学，博士

Hong Kong University of Science and Technology，

Doctor

2020-2025年自香港科技大学取得工学博士学位，隶属显示和光电子国家重点实验室。由Prof. Srivastava指导，从事液晶取向技术及液晶光电应用长达五年。

过去五年，主要工作于可工业替代的液晶单分子取向层，其常温高效处理特性及优秀的光电性能使其有望作为全新的备选取向材料。此外，着力开创了无阈值液晶+无源振动传感的新领域，成功验证了无电源依赖的远程、实时、高精度振动传感的概念模型。

从2020年起，连续5年向ICDT/SID Symposium投稿8篇，其中第一作者4篇，第2作者4篇；获Display Week报告机会2次，Poster展示机会2次。与会期间，我与参会科研工作者及参展商广泛交流最新技术进展，主要涵盖显示器配件和涂层、液晶技术及新型应用等。

I am Yu Xinyi, obtaining the Ph.D. in Engineering from the Hong Kong University of Science and Technology from 2020 to 2025, affiliated with the State Key Laboratory of Display & Opto-Electronics. Under the guidance of Prof. Srivastava, I have been engaged in liquid crystal (LC) alignment technology and LC optoelectronic applications for five years.

Over the past five years, I mainly focused on industrially viable single-molecule alignment layers for LCs. Their efficient processing available at room-temperature and excellent optoelectronic performance make them promising as a new alternative alignment material. Additionally, I pioneered a new field of threshold-less LC + passive vibration sensing, successfully validating the concept model of remote, real-time, and high-precision vibration sensing without power dependence.

Since 2020, I have submitted 8 papers to ICDT/SID Symposium, including 4 as the first author and 4 as the second author. I have also been given the opportunity to present at Display Week twice and to display posters twice. During these conferences, I extensively exchanged the latest technological advancements with fellow researchers and exhibitors, mainly covering display accessories and coatings, LC technology, and novel applications.

题目

基于膦酸的高性能常温处理单分子取向层

摘要：

SID伴随了我的液晶研究生涯，它为我的工作注入了灵感，也带来了新的友谊连接。在过去的五年中，我致力于液晶的基础优化和新型应用。因此，我的演讲将主要介绍高性能常温处理单分子取向层，并提及正在开发中的基于无阈值液晶的无源振动传感技术。

工业中常用的聚酰亚胺取向材料具备高稳定性和优秀的光电性能，却受制于硬烤流程带来的高成本、高能耗和高碳排放。我们以膦酸表面剂为出发点，提出了一套材料设计基准框架，并开发了一系列高性能材料，包括超快处理、光致平行/垂直取向、光致可改写材料等。它们均可通过低温浸泡-清洗流程实现高效材料沉积，其处理过程可短至30分钟，且具有极高的材料利用率。与此同时，它们却具备与商用聚合物、光取向材料相当，甚至更优秀的光电性能。

此外，液晶的未来在于跨学科应用。我们将无阈值液晶，包括向列和铁电液晶，创造性地集成到无源振动传感系统中，通过将微弱传感电信号的高线性、宽频域地转换为调制的光信号，我们实现了无电源依赖性的远距离实时振动监测。

Title

High-performance phosphonic-acid-based monolayer alignment materials with room-temperature treatment

Abstract：

SID has accompanied my research career in liquid crystals (LCs), providing inspiration for my work and fostering new friendships. Over the past five years, I was dedicated to the fundamental optimization and novel applications of LCs. Therefore, my presentation will mainly focus on high-performance room-temperature processed monolayer alignment layers and also touch upon the passive vibration sensing technology based on threshold-less LCs that we are developing.

The polyimide alignment materials commonly used in industry offer high stability and excellent photoelectric performance, but they are constrained by the high cost, energy consumption, and carbon emissions associated with the hard baking process. Starting from phosphonic acid surface agents, we proposed a set of material design benchmark frameworks and developed a series of high-performance materials, including ultrafast processing, photo-induced parallel/perpendicular alignment, and photo-induced rewritable materials. All of these materials can be deposited efficiently through a low-temperature immersion-washing process, with the processing time as short as 30 minutes and a very high material utilization rate. Meanwhile, they possess photoelectric performance comparable to or even better than commercial polymers and photoalignment materials.

Furthermore, the future of LCs lies in interdisciplinary applications. We have creatively integrated thresholdless LCs, including nematic and ferroelectric LCs, into passive vibration sensing systems. By converting weak sensing electrical signals into modulated optical signals in a highly linear and wide frequency range, we have achieved real-time remote vibration monitoring without power dependence.