李贵君


Guijun Li.jpg李贵君博士目前是深圳大学物理与光电子工程学院的助理教授,也是深圳大学光电子器件与系统教育部/广东省重点实验室副主任。他拥有南开大学电子科学和技术专业学士学位和硕士学位。之后,他跟从香港科技大学(HKUST)的郭海成教授学习,并获得了电子与计算机工程博士学位。他曾经与他人共同创立了IntelligentOptics(香港)有限公司,担任汉能(成都)的技术顾问,以及香港科技大学先进显示和光电技术国家重点实验室研究员。他发表了70多篇期刊论文/会议论文集,参与了AdvancedSilicon Solar Cells (Springer)专著的撰写工作,申请了15项发明专利,其中10项已获授权。他目前的研究兴趣是先进显示,主要从单元像素器件层面解决面向多功能和智能化信息显示的面临的难题。


Dr.Guijun Li is currently an assistant professor in the college of physics andoptoelectronic engineering at Shenzhen University, and also the vice-director of Key Laboratory of Optoelectronic Devices and System, Ministry of Education,Shenzhen University. He received his BS and MS degree in Electrical Engineering from Nankai University. He then studied with Prof. Hoi-Sing Kwok at Hong Kong University of Science and Technology (HKUST), where he received his PhD degreein Electronic and Computer Engineering. He has co-founded the Intelligent Optics (HK) Ltd, served as the technical consultant of Hanergy (Chengdu), andthe Research Associate of State Key Laboratory of Advanced Displays and Optoelectronics Technologies of HKUST. He has published over 70+journal papers/conference proceedings and co-authored 15 patents with 10 granted. His current research focuses on the advanced display, mainly involving in device-level engineering towards multifunctional/intelligent information display.


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基于像素工程的智能显示技术


       随着5G、人工智能(AI)、物联网(IoT)和自动驾驶等新技术的逐渐成熟,开发多功能信息显示技术可以增强独特的用户界面和人-机、机-机交互性。要实现智能显示,需要开发能够兼具光发射和信号探测的单元像素器件。然而,将信息发送和信号接收功能集成到单个显示像素阵列中一直是一项具有挑战性的工作,这是因为作为显示的发光单元子像素器件不能够很好地同时进行信号探测:1)电学上,电荷注入(光发射)和电荷分离/解离(光探测)是逆向的物理过程。常规的器件设计难以在单个器件中同时实现有效的电荷提取和电荷注入,因为器件结构被预设为仅能促进单个方向的载流子传输;2)光学上,发光器件的有源层厚度不能保证足够的光吸收,难以将发光器件用于有效的弱光探测。本次报告我们将展示我们在开发用于多功能显示器的光敏型发光像素单元所作的基础性研究工作。首先,通过提出基于非对称有源层结构的器件结构,从概念上验证了能够集成光发射、光探测和能量收集的器件结构设计;其次,通过将显示像素单元的光生电压耦合到双栅极TFT的栅极进行探测信号的放大,获得了具有高开关比、能够实现弱光检测的显示像素单元器件。


Pixel­-level Engineering towards Intelligent Displays


With the gradual maturity of new technologies such as 5G, artificial intelligence(AI), internet of things (IoTs), and autonomous driving, the development of information displays with multiple functionalities is an attractive feature toenable enhanced unique user interfaces and interactivity. The basic technology-related requirement of the intelligent display is the ability of transmitting and receiving information or signal in the form of visible light.However, integrating the functionalities of the information transmitter and signal receiver into pixel arrays of a display panel is challenging, becausethe sub-pixel of an emissive display cannot perform simultaneous visible light generation and reception very well. Electrically, the charge injection for lightemission and charge separation/exciton dissociation for light detection is a conversephysical process. It is difficult for the conventional design for the device with a single active layer to achieve efficient charge extraction and chargeinjection simultaneously, as the structure is presupposed to facilitate onlyone-directional transport. Optically, it is difficult to use a light-emitting device for sensitive weak light detection, as the ultrathin thickness of the light-emitting device cannot guarantee sufficient light absorption. In this talk, we will talk about the work we have done to address the above electrical and optical issues for the development of light-responsive light-emitting diodes for multifunctional displays. First, we will demonstrate alight-emitting device with integration of proof-of-concept functions of information displaying, signal sensing, and energy harvesting. Second, we will show alight-emitting device that is capable of ultrasensitive weak light detection,by coupling the light response of photovoltage to the gate of a double-gate TFT to amplify the signal.



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