Short Courses

Hyun Jae Kim and Joon Seok Park will describe in detail technology trends in materials, processes, devices, and various applications of oxide TFTs. The fundamental physics and conduction mechanism of oxide semiconductors will be the main subjects of the first half of the course. The course will also provide the background for LTPO (LTPS +oxide) technology and describe its main characteristics, as well as focus on post-LTPO and challenges to be overcome. Flexible and stretchable TFT technologies for OLED displays and future transistors for OLEDos (OLED on silicon) and LEDos (LED on silicon) will also be covered. Lastly, applications besides displays using oxide TFT will be discussed.

Hyun Jae Kim received his BS in materials science and engineering at Yonsei University and his MS and as a principal engineer at Samsung Electronics from 1996 to 2005 and a visiting professor at Ecole Polytechnique from 2004 to 2005, he became a professor in the School of Electrical and Electronic Engineering at Yonsei University in 2005. His research has focused on various electronic devices such as oxide TFTs, biosensors, photosensors, memory, and energy storage devices with about 260 SCI papers and 350 patents. He was elected to SID Fellow in 2017 and has been Editor of ACS (American Chemical Society) Applied Electronic Materials since 2018.

Joon Seok Park is currently a principal engineer at the R&D Center of Samsung Display, Inc. He obtained his BS degree at KAIST and his PhD at Stanford University in 2008, all in materials science and engineering. After beginning his professional career as a senior engineer at the Samsung Advanced Institute of Technology (SAIT), where he participated in early stage research of oxide TFTs, he joined the Samsung Display LCD business in 2013, contributing to the mass production of the first LCD monitors based on IGZO-TFT backplanes in 2014. He joined the R&D Center in 2015, where he has committed himself ever since to the development of top-gate oxide TFT backplanes for AMOLED applications. He currently leads a group of 20 highly qualified engineers. 

Moderators: Joon Seok Park and Hyun Jae Kim

This tutorial will introduce the fundamentals of OLED design, fabrication, and characterization for display applications. It will provide a brief introduction to the relevant physics of organic semiconductors, examine the ultimate performance limit of OLEDs, and then progress to the different types of architectures and emitters used in state-of-the-art devices. Methods of deposition and patterning relevant for displays will be covered along with the various metrics used to assess OLED efficiency and color quality. The course will conclude with an overview of tactics for improved light outcoupling as well as a discussion of the factors that limit OLED operational lifetime.

Stephen R. Forrest has received numerous awards and medals for his invention of phosphorescent OLEDs, innovations in organic LEDs and organic thin films, and advances in photodetectors for optical communications. Forrest received a BA in physics from the University of California, and MSc and PhD degrees in physics from the University of Michigan. In 1985, he joined USC and, in 1992, moved to Princeton University.  In 2006, he rejoined the University of Michigan as vice president for research, and is now the university’s Peter A. Franken Distinguished University Professor of Engineering. He is also a Fellow of the APS, IEEE, and OSA and a member of the National Academy of Engineering, the National Academy of Sciences, the American Academy of Arts and Sciences, and the National Academy of Inventors. He has authored ~650 papers in refereed journals and has 375 US patents, many of which are also granted worldwide. Forrest is co-founder or founding participant in several companies, including Sensors Unlimited, Epitaxx, Inc., NanoFlex Power Corp., Universal Display Corp., and Apogee Photonics, Inc., and is on the Growth Technology Advisory Board of Applied Materials.  He is past chairman of the board of the University Musical Society and served as chairman of the board for Ann Arbor SPARK.  He has served on the Board of Governors of the Technion – Israel Institute of Technology, where he is a distinguished visiting professor of electrical engineering. He received an honorary doctorate from the Technion in 2018, the Henry Russel Lectureship at the University of Michigan in 2019, and, most recently, the IEEE Electron Devices Society William R. Cherry Award in 2022.  His first book, Organic Electronics: Foundations to Applications, was published in September 2020.

Chris Giebink is a professor of electrical engineering at University of Michigan. He received his Ph.D. in electrical engineering from Princeton University and holds undergraduate degrees in both physics and engineering science from Trinity University (TX).  His research focuses broadly on optoelectronic and photonic devices based on organic materials, with applications in solar energy conversion, solid-state lighting, lasers, and nonlinear optics. He holds 11 patents and is a senior member of the IEEE, OSA, SPIE, and National Academy of Inventors as well as a recipient of the DARPA YFA, AFOSR YIP, and NSF CAREER awards.

Moderators: Chris Giebink and Stephen R. Forrest

This short course describes general simulation methodology for predicting characteristics of displays in terms of materials, TFT/OLED devices, circuitry, optics, and mechanics, which partially includes computational engineering combined with machine learning (ML) and artificial intelligence (AI). This course contains fundamental and basic theory, numerical approaches for computational engineering, conceptual processes for applying ML and AI with simulated big data, and a global optimization method for display design. The first part of the course, presented by Hyung Uk Cho, describes smart design for OLED materials and devices, building up TFT physical models, pathfinding for new pixel-driving circuits, and three dimensional optical analysis with large optical structures, etc. The second part, presented by Yudeok Seo, covers smart design for display panels with new form factors such as foldable displays in terms of mechanics and theoretical approaches into fabrication processes for displays.

Hyung Uk Cho joined Samsung Display Research Center in 2011 after earning a PhD in optoelectronic device/circuit simulation. He is currently a principal engineer in the computer-aided engineering (CAE) team. His principal research interests are numerical analysis modeling based on the finite-element method (FEM)/finite-volume method (FVM) for electro-optics and simulation for photonic devices that are used for next-generation displays such as OLED, LED, and EL-QD. He is also currently focusing on mixed simulation for TFT/OLED devices and pixel circuits in terms of cosmetic condition and image perception. 

Yudeok Seo is a principal engineer of the CAE team at Samsung Display. He received his PhD, MS, and BS degrees in mechanical engineering from the Korea Advanced Institute of Science and Technology (KAIST). His research area at KAIST was focused on fundamental research into CAD integrated finite-element method and advanced topology optimization approaches. At Samsung, he has been responsible for mechanical simulation and AI prediction for flexible displays since 2010, and currently focuses on design for manufacturing (DFM) and numerical simulations for fabrication processes in displays.

Moderators: Yudeok Seo and Hyung Uk Cho