메인메뉴 바로가기 본문으로 바로가기

경상국립대학교

전체메뉴

GNU Today

Gyeongnam’s national flagship university representing Korea

People

전체 4건 1/1페이지

Professor Yoonhee Kim’s research team in the Department of Chemistry develops ultra-high-efficiency green OLED technology for next-generation UHD displays

The research team led by Professor Yunhee Kim of the Department of Chemistry, College of Natural Sciences at Gyeongsang National University (GNU; President Jinhoe Kwon), through joint research with Samsung Electronics SAIT (formerly Samsung Advanced Institute of Technology) and researchers from Kyung Hee University, has developed next-generation HF: Hyper Fluorescence OLED technology that simultaneously achieves pure green emission approaching BT.2020—the international standard for representing wider and more accurate colors in Ultra-High-Definition (UHD) displays—as well as ultrahigh efficiency and high-brightness stability. In this study, Professor Yoonhee Kim's research team designed and synthesized a new multiple-resonance-based thermally activated delayed fluorescence (MR-TADF) emitter, DBF-v-DABNA, and applied it to actual devices, demonstrating its potential as a key material for next-generation ultra-high-resolution displays. Next-generation ultra-high-definition OLED (UHD OLED) displays must simultaneously satisfy not only high efficiency but also color purity and operational stability at high luminance. In particular, BT.2020 is the standard with the widest color gamut currently available, capable of reproducing natural colors most accurately. To meet this standard, the emission spectrum must be kept extremely narrow, making the design of emissive materials highly challenging. Existing green MR-TADF emitters have had limitations in simultaneously achieving high color purity, maintaining efficiency at high luminance, and long device lifetimes. To address these issues, the research team developed a new MR-TADF emitter, DBF-v-DABNA, based on a molecule-centered rigid structure and a steric design that protects the emissive site. This material effectively suppressed vibronic coupling, intermolecular interactions, and Dexter energy transfer that causes efficiency loss, thereby simultaneously improving color purity, efficiency, and stability. As a result, the hyperfluorescent green OLED using this material achieved a maximum external quantum efficiency (EQE) of 35.6%, maintained a high efficiency of 33.9% even at a practical high luminance of 1000 cd m-2, and secured an operational lifetime of over 600 hours at 5000 cd m-2. In particular, in a top-emitting structure that emits light opposite to the substrate, it realized a very pure green with International Commission on Illumination (CIE) color coordinates of (0.14, 0.79), exhibiting performance approaching the BT.2020 green standard, thereby demonstrating the potential of next-generation pure green OLEDs that simultaneously meet high color purity, high efficiency, and high stability. This study not only developed a new green OLED material; it is highly significant in that it points to the direction molecular design should take for next-generation display technologies that simultaneously demand ultra-high color purity, ultra-high efficiency, and high stability. In particular, by effectively overcoming the efficiency roll-off at high luminance and the stability issues long cited as limitations of MR-TADF-based emitters, it is regarded as having opened new possibilities for the development of OLED materials for future UHD, AR/VR, and premium displays. This study, in which Lee Seon-jeong, M.S., of Gyeongsang National University and Dr. Sim Myeong-seon of Samsung Electronics SAIT participated as co-1st authors, is an outcome of industry–academia joint research and was carried out with support from the National Research Foundation of Korea’s LAMP (G-LAMP) program and Global-type Mid-career Research, as well as from Samsung Electronics SAIT. The research findings, titled “Stable Pure-Green Hyperfluorescent Organic Light-Emitting Diodes with Ultimate Efficiency at High Brightness Toward Rec 2020 Standard,” have also been selected as an Inside Back Cover paper in the world-renowned journal in materials science Advanced Materials (IF: 26.8) and are scheduled to appear in the May print issue (paper link: DOI: 10.1002/adma.202518330). Furthermore, this achievement is regarded as a representative example of industry–academia collaboration that demonstrates not only academic excellence but also the potential for industrial expansion of core materials technology for next-generation displays. For inquiries about the content: Professor Kim Yoon-hee, Gyeongsang National University, 055-772-1491

2026.04.14 총무과

Professors Lee Mun-su (Department of Education) and Yu Hae-jun (Department of Korean Language Education) to lead improvements to the Test of Proficiency in Korean (TOPIK) assessment system

Gyeongsang National University Professors Lee Moon-su and Yoo Hae-jun win Test of Proficiency in Korean (TOPIK) project contract Principal Investigator Professor Moon-Su Lee, Co-investigator Professor Hae-Jun Yoo ▸Project: Policy Research on Improving the Assessment System in Response to the Digital Transformation of the Test of Proficiency in Korean Gyeongsang National University (GNU; President Kwon Jin-hoe) has been awarded a commissioned research project from the National Institute for International Education, which administers the Test of Proficiency in Korean (TOPIK) for foreigners. In the National Institute for International Education project, ‘Policy Study on Improving the Assessment System in Response to the Digital Transition of the Test of Proficiency in Korean,’ Professor Lee Moon-soo of the Department of Education was selected as principal investigator, and Professor Yoo Hae-joon of the Department of Korean Language Education was selected as co-investigator. Buoyed by the Korean Wave boom, applicants for the Test of Proficiency in Korean (TOPIK) numbered 330,000 in 2021, 360,000 in 2022, 420,000 in 2023, 490,000 in 2024, and surpassed 550,000 in 2025. As the number of applicants grows, the government plans to increase domestic test centers and expand the number of countries where the test is administered overseas. TOPIK began in 1997 and will mark its 100th edition this May. The test results are used for international students’ admission to and graduation from universities in Korea, corporate recruitment, and reviews for eligibility for residence status in Korea. To meet growing domestic and overseas demand, the Ministry of Education plans to expand the number of countries implementing the internet-based test (IBT) from 13 this year to 17 next year by adding four countries, including Nepal, Laos, Bahrain, and India. Buoyed by this popularity, as the number of foreign test-takers for the Test of Proficiency in Korean increases, the domestic test centers for the internet-based test and the countries where it is administered will be expanded this year. Through the 2026 Test of Proficiency in Korean administration plan, the Ministry of Education announced that a total of 15 test sessions will be administered this year, including internet-based tests. This project is expected to aid the digital transition of the Test of Proficiency in Korean (TOPIK). Gyeongsang National University is currently designated as an official TOPIK test site, and the Language Education Office of the Office of International Affairs supports TOPIK registration and Korean language education for students in Korean-language courses and international students. Photo caption: Professor Lee Mun-su (Department of Education) and Professor Yu Hae-jun (Department of Korean Language Education) at Gyeongsang National University (from left). For content inquiries: Professor Haejun Yu, Gyeongsang National University, 055-772-2153

2026.04.13 총무과

Graduate students Se-yeon Choi and Yu-gyeong Kim selected for WISET 'Women Graduate Student Engineering Research Team Program'

2 Graduate Students Selected for the Graduate Student Engineering Research Team Support Program (Advanced Track) ▸Choi Se-yeon, Integrated Master’s and Ph.D. Program, Molecular Immunobiology Laboratory, Department of Pharmacy ▸Yu-kyung Kim, Ph.D. Student, Architectural Construction and Construction Management Laboratory, Department of Architectural Engineering Two graduate students from Gyeongsang National University (GNU; President Kwon Jin-hoe) have been selected for the “2026 Advanced Track Research Team” under the Women Graduate Students’ Engineering Research Team Support Program organized by the Korea Foundation for Women in Science, Engineering and Technology (WISET; President Moon Ae-ri). This program supports women graduate students in science and engineering in conducting self-directed R&D to strengthen their research capabilities and leadership, thereby helping them grow into outstanding future science and technology talent. Choi Se-yeon, an integrated MS-PhD student in Professor Lee Chang-seop’s Molecular Immunobiology Laboratory in the Department of Pharmacy, together with undergraduate students Song Ji-su, Hwang Hee-seon, and Yu Hee-jung, will conduct research for about seven months on the topic ‘Reprogramming of Eat-me Signals: Phosphatidylserine (PtdSer) as an Immunoregulatory Signal of Viable Cells from an Apoptotic Marker’. This study aims to reinterpret phosphatidylserine (PtdSer), long regarded as a canonical marker of apoptosis, from the new perspective that it can act as an immunoregulatory signal even in viable cells, thereby elucidating a new mechanism for the regulation of immune responses. In particular, it is expected to broaden basic research in molecular immunobiology and suggest possibilities for developing immunotherapeutic strategies. The Molecular Immunobiology Laboratory in the Department of Pharmacy was selected for this program for two consecutive years, demonstrating sustained research competitiveness and excellence. Choi Se-yeon said, “As the principal investigator, I consider it very meaningful to carry out the project, and I am grateful for the help of my advisor and the members of our lab,” adding, “Building on this research experience, I will further strengthen my capabilities as a researcher and, in collaboration with my teammates, achieve meaningful outcomes.” Yu-gyeong Kim, a doctoral student in Professor Seok-heon Yoon’s lab (Architectural Construction and Construction Management Lab) in the Department of Architectural Engineering, is conducting research with undergraduate students Hyun-su Lim, Min-seul Kwak, and Seung-beom Ha on the topic of 'Development of a Drone-Based Point Cloud (Point Cloud)–BIM-Linked Construction Progress Management Artificial Intelligence Agent (AI-Agent) Process'. This study aims to develop smart construction management technology that automatically estimates the construction progress rate by integrating drone-collected point cloud data with information from digital building modeling technology (BIM, Building Information Modeling), and to maximize the efficiency of construction process management through AI-Agent-based analysis and visualization. It is expected to contribute to enhancing digital transformation and automation at construction sites. Kim Yu-kyung said, “As I take on the role of principal investigator for the first time, I feel a great sense of responsibility. I am grateful to have received this valuable opportunity thanks to the help of my advisor and the members of my lab,” adding, “I will collaborate with my teammates to produce research outcomes that can be applied to real construction sites and will continue to strengthen my research capabilities.” This achievement demonstrates that Gyeongsang National University has been steadily producing results in nurturing women’s talent in science and technology and in convergence research, and is expected to spur the dissemination of research outcomes across diverse academic disciplines going forward. Photo description: Gyeongsang National University Department of Pharmacy integrated master’s and doctoral program student Choi Se-yeon and Department of Architectural Engineering doctoral student Kim Yu-gyeong (from left). For inquiries: Department of Pharmacy, Gyeongsang National University 055-772-2419, Department of Architectural Engineering 055-772-1750

2026.04.08 총무과

Professor Choi Myeong-ryong of the Department of Chemistry Selected as Outstanding Editor of a World-Renowned Academic Journal for the 2nd Consecutive Year

Professor Myung-Ryong Choi Selected as 'Outstanding Editor' for Two Consecutive Years by a World-Leading Journal Light: Science & Applications, an optics and photonics journal published by Nature ▸Demonstrated research impact through editorial activities for international academic journals 경상국립대학교(GNU·총장 권진회) 자연과학대학 화학과 최명룡 교수(광화학 나노소재 전문 핵심연구지원센터장)가 세계적 학술지 《라이트: 사이언스 앤 애플리케이션스》(IF:23.4)에서 2년 연속 우수 편집자로 선정됐다. 《라이트: 사이언스 앤 애플리케이션스》는 네이처가 발행하는 광학·포토닉스 분야의 세계 최상위권 학술지로, 최신 광기술과 광물질 연구를 선도하는 국제적으로 권위 있는 저널이다. 해당 저널은 높은 영향력 지수와 엄격한 심사 기준으로 잘 알려져 있으며 전 세계 연구자들 사이에서 영향력이 매우 큰 학술지로 평가받고 있다. 최명룡 교수는 해당 학술지의 편집위원으로 활동하며 논문의 학술적 가치와 연구 완성도를 평가하고 연구 방향성을 제시하는 역할을 수행해 왔다. 특히 공정하고 전문적인 심사 운영과 학문적 기여도를 인정받아 2년 연속 우수 편집자로 선정되는 성과를 거뒀다. 이번 선정은 단순한 개인 성과를 넘어 국내 연구자가 국제 학술지의 핵심 운영에 참여하며 글로벌 연구 생태계에서 영향력을 확대하고 있음을 보여주는 사례로 평가된다. 최명룡 교수는 “세계 각국의 우수한 연구를 가장 먼저 접하고 평가하는 과정에서 책임감을 느낀다.”며 “앞으로도 공정한 학술 교류와 연구 발전에 기여하도록 노력하겠다.”라고 말했다. 한편, 최명룡 교수는 레이저 기반 촉매 합성과 에너지·환경 소재 분야에서 활발한 연구를 수행하며 국제 학술지 논문 게재 및 편집 활동을 통해 꾸준히 학문적 성과를 이어가고 있다. 이번 성과는 교육부 기초과학연구역량강화사업 재원으로 한국기초과학지원연구원(KBSI) 국가연구시설장비진흥센터(NFEC)의 지원을 받아 수행되었다. ㅇ 사진 설명: 네이처 포트폴리오 학술지 《라이트: 사이언스 앤 애플리케이션스》 로고와 최명룡 교수 ㅇ 내용 문의: 경상국립대학교 화학과 최명룡 교수 055-772-1492

2026.04.07 총무과