Journal of the Society for Information Display
Jiun‐Haw Lee · Information Display · 2022
Jiun-Haw Lee Editor in Chief The November 2021, December 2021, and January 2022 issues of the Journal of the Society for Information Display (JSID), accepted three, seven, and four papers, respectively, for the following special issues: “Best of Eurodisplay 2019,” “Best of International Conference on Display Technology (ICDT) 2020,” and “Best of International Display Workshop (IDW) 2020.” Conference committees stringently selected the “best” papers from these SID-sponsored conferences, with less than 5 percent of the accepted abstracts being nominated. Then, the authors were invited to submit a full-length manuscript to JSID, which underwent a standard peer-review process. Hence, these papers are highly selective with outstanding quality. There also is a special issue of “Education in Displays, Nano, and Microfabrication” with four papers published in the November 2021 issue, guest edited by George Patrick Watson and Ioannis Kymissis from the University of Pennsylvania and Columbia University, respectively. Because of COVID-19, remote learning has become increasingly important—and, at times, a necessity. Displays are an essential interface for education. So, this special issue introduced education modules and learning management systems that are expected to have a substantial impact on future education in multiple technologies. There is one “invited paper” in the January 2022 issue of JSID. A flexible transparent display was demonstrated based on organic light-emitting diodes (OLEDs) integrated with electrochromic shutter (ECS) to improve the contrast ratio of the display. A laboratory course on information display technologies for remote learning | Kevin A. Kam et al.| doi:10.1002/jsid.1000 The authors introduced remote educational experiences for a laboratory-based course at Columbia University, working with various display technologies during the pandemic. The goal of this remote-learning course is to provide a hands-on lab experience. All the lectures were conducted online, and the lab kits could be purchased for a reasonable price. The office hours were arranged to accommodate students in different time zones. Three modules were designed in this course: color perception, light-emitting diode (LED), and liquid crystal display (LCD). Although remote learning occurred because of the COVID-19 lockdown, the results were effective, as deduced from a course assessment. As a result, Columbia University is considering continuing this option after COVID-19 cases subside. JSID is published monthly by Wiley. Subscription fees apply, but SID members and student members have free online access via sid.org/Publications.aspx. Many universities also have an institutional subscription. JSID is indexed in the Web of Science. Submit your original manuscript online via mc.manuscriptcentral.com/sid. Author guidelines can be found on the Journal's homepage: tinyurl.com/jsidhome. Editorial board: tinyurl.com/jsideb. Please direct any questions about JSID to its editor in chief at [email protected]. EarlyView: accepted papers about to be published can be accessed online via tinyurl.com/jsidev. The Journal is soliciting review papers on any display-related topic. If you have a great idea for a review paper, please contact the editor at [email protected]. Page charges for invited review papers will be waived. Operando sum-frequency generation spectroscopy of high-efficiency OLEDs for probing the charge carrier behavior | Takayuki Miyamae and Tomoya Sato | doi:10.1002/jsid.1076 An OLED consists of multiple organic stacks sandwiched by an anode and a cathode. When applying a voltage, electric current can be measured. However, it is not possible to measure the dynamics of charge carriers directly in different layers, such as the hole-transporting layer (HTL), emitting layer (EML), and electron-transporting layer (ETL). In this paper, electric-field-induced doubly resonant sum-frequency generation (EFI-DR-SFG) and time-resolved EFI-DR-SFG were used to nondestructively study the charge carriers in different layers of the OLED under operation. Organic materials in each layer corresponded to different SFG wavenumbers, which could be monitored individually. With time-resolved measurement, charge-carrier dynamics in different organic layers could be obtained separately. Two blue triplet-triplet annihilation (TTA) OLEDs with different structures were tested. One device with a higher carrier concentration at the EML resulted in higher efficiency because of an effective TTA process. However, it also reduced the operation lifetime for the same reason.