AJOU UNIVERSITY

Department of Energy Systems Research

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main-visual-img01 Department of Energy Systems Research

Department of Energy Systems

Department of Energy Systems Research

Leading super-convergence renewable energy research and education to achieve carbon-neutrality.

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main-visual-img01 Department of Energy Systems Research

Department of Energy Systems

Department of Energy Systems Research

Leading super-convergence renewable energy research and education to achieve carbon-neutrality.

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13

4th BK21 Project News

This is the latest news.
#AJOU #INTERNATIONAL #SUMMER #SCHOOL #AISS #ABC

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AISS & ABC, Successful Completion of International Exchange Programs for Foreign Students

Ajou University has successfully concluded its international exchange programs for foreign students_the 2025 Ajou International Summer School (AISS, Ajou International Summer School) and the (ABC, Ajou Bespoke College). The ABC Program ran for two weeks, from July 2 to July 15, beginning with an orientation held at Yulgok Hall. A total of 19 students from partner universities abroad including the University of Wisconsin, University of Southern California, University of South Florida, University of Nevada, Las Vegas, and the University of California, San Diego participated alongside 10 students from Ajou University. The program was designed to foster growth through capstone design projects, corporate field trips, and cultural exchange between international students and their Ajou counterparts. Participants visited companies such as Naver, Samsung Electronics, Gyeonggi Provincial Council, Dentium, Celltrion, and Daewoong Pharmaceutical, and explored Korean culture and history through experiences like visits to the National Museum of Korea, K-POP dance classes, and the Hwaseong Haenggung Palace. The program also included special lectures such as: Data Analysis on Korea's Economic and Cultural Development by Prof. Yoon Cheon-Seok (Global Business) Korea's Industrial History and Growth through Early Entrepreneurship by Prof. Kim Chan-Woo (University-Industry Cooperation) Modern History Rooted in Ancient Korea by Prof. Han Sang-Woo (History) Promoting Historical Content through National Museum Exhibits by Prof. Park Jae-Yeon (Cultural Contents) The AISS program was conducted over a three-week period starting on June 30, concluding with a graduation ceremony on July 18. During the program, students took courses such as: Data Analytics and Business Decision Making by Prof. Lee Sang-Kyu (Endicott College) Macroeconomic Development by Prof. Kim Tae-Bong (Economics) Understanding Korean Culture by Scott Scattergood (Dasan College) Sustainability by Prof. Lee Jae-Young (Environmental Safety Engineering) Korean Language by Professors Jeong Mi-Hye and Jeong Mi-Ji (Dasan College) In addition to classes, students enjoyed various cultural experiences including K-POP dance, traditional Korean cuisine, and visits to Bukchon Hanok Village. They also toured local landmarks such as the Samsung Innovation Museum, Hwaseong Haenggung Palace, and Suwon Media Center, gaining insights into both Korea’s past and present. At the AISS farewell, Prof. Lee Sang-Kyu told the graduates, “If you experienced something here that can only be found in Korea, make sure to record it. It will surely be something worth remembering.” He emphasized the lasting value of the students’ experiences in Korea. Exchange students enjoyed a K-pop dance Hwaseong Haenggung Palace Tour
#AJOU # 한국연구재단 중견연구자지원사업 #G-Lamp #Carbon to X 기술개발사업 #선도연구센터(MRC)

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Team professor Inhwan Lee Develops New Synthetic Method for Designing Semiconducting Polymer Structures

Professor Inhwan Lee’s research team at our university has successfully developed a new synthetic method that allows for flexible design of the structure of semiconducting polymer materials. This advancement enables faster production of polymers used in electronic devices and is expected to contribute significantly to the development of next-generation organic semiconductors. Professor Lee revealed that through a “Multicomponent Polymerization (MCP)” technique, which reacts three different monomers simultaneously, they have developed a technology that precisely controls the sequence inside semiconducting polymers and efficiently implements various structures. This research was published in the July issue of Angewandte Chemie International Edition under the title “Versatile Halide-Pair-Driven Multicomponent Polymerization for Library Synthesis of Sequence-Controlled Semiconducting Dendronized Polymers.” The paper received excellent reviews and was selected as a “Very Important Paper (VIP).” The study involved doctoral student Hae-nam Choi (right in the photo) from the Department of Energy Systems at Ajou University as the first author. Co-authors included Soo-min Go (Master’s graduate, Ajou University), Se-min Son (Integrated Master’s and PhD program, Ajou University), Ji-su Woo (Master’s student, UNIST Department of Energy Chemical Engineering), Hyun-woo Park (PhD student, ETH Zurich Department of Materials), and Dong-jun Lee (Graduate of integrated Master’s and PhD program, Ajou University). Professors Tae-rim Choi (ETH Zurich, Materials), Won-jin Kwak (UNIST, Energy Chemical Engineering), and Hwan-myung Kim (Ajou University, Energy Systems) participated as co-authors, and Professor Inhwan Lee (Ajou University, Department of Chemistry) served as the corresponding author. Poly(triarylamine) (PTAA) polymers are used in various organic electronic devices such as organic light-emitting devices, perovskite solar cells, electrochromic devices, flexible electronics, and battery electrodes. PTAA is especially notable as a hole transport material in perovskite solar cells. However, traditional synthesis of poly(triarylamine) polymers involved complicated multi-step synthesis and purification of reaction intermediates, which posed challenges for commercialization and cost efficiency. The core of this research lies in presenting a new polymerization strategy that precisely controls the polymer sequence by designing the reaction order of three readily available monomers mixed together in a single step. The research team successfully synthesized a library of semiconducting poly(triarylamine) polymers where arylamine and two types of aryl dihalide monomers are connected in a predetermined sequence. They also expanded this strategy to synthesize complex dendronized polymers, greatly broadening the structural diversity of polymers. As a result, poly(triarylamine) polymers and their derivatives used in electronic devices can now be rapidly produced in library form, which is expected to greatly accelerate the development of next-generation organic semiconductors. Professor Inhwan Lee said, “Through this research, we have enabled the cheap and diverse synthesis of expensive polymers in a single reaction step. We also expect this to contribute to improving the performance of organic electronic devices.” This research was supported by the National Research Foundation of Korea’s Mid-career Researcher Support Program, the G-LAMP program, the Carbon to X technology development project for producing useful substances, and the Leading Research Center (MRC) program. Image showing the synthesis process of sequence-controlled semiconducting polymers via sequential C–N coupling reactions
#AJOU #Universuty #Energy Harvesting Technology

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Team Prof. Taekwang Yoon develops Energy Harvesting Technology

(Photo) Schematic diagram of the energy generation system and mechanism: (a) Autonomous electrical energy harvesting system driven by water circulation due to temperature difference between day and night (b) Water harvesting mechanism using UiO-66-NH₂ (c) Electrical energy generation mechanism using Ni3(HITP)2 (d) Autonomous water harvesting and sustainable electrical energy generation system under ambient environmental conditions A Korean research team has developed a technology that collects moisture from the air using temperature differences between day and night, and converts it into electrical energy. The joint research team, led by Professor Taekwang Yoon from the Department of Applied Chemistry and Biological Engineering at Ajou University and Principal Researcher Giro Yoon from the Korea Institute of Industrial Technology (KITECH), has introduced an innovative energy harvesting system. This system is capable of generating electricity independently without any external water supply, even in extreme environments such as remote areas or deserts where water is scarce. The results of this research were published in the internationally renowned journal Composites Part B: Engineering (top 1% in JCR), under the title: "Sustainable electrical energy harvesting via atmospheric water collection using dual-MOF systems." The first authors of the study are Ji-Hyun Lee (integrated master’s and Ph.D. program, Hanyang University), Dong-Yeon Kim (Ph.D. candidate, KAIST), and Yong-Gyun Lee (master’s student, Ajou University). Professor Taekwang Yoon and Principal Researcher Giro Yoon served as co-corresponding authors. Traditional water-based energy harvesting technologies rely on the potential difference between wet and dry surfaces to generate electricity, but they have the limitation of requiring a constant external water supply. To overcome this, the research team was inspired by plant transpiration and capillary action, and combined two types of metal-organic frameworks (MOFs)—UiO-66-NH₂ and Ni₃(HITP)₂. As a result, they successfully developed a fully autonomous system that collects moisture from the air and generates electricity on its own. UiO-66-NH₂ absorbs moisture from the cool night air and releases the absorbed moisture during the warmer daytime. The released moisture condenses on the surface of fibers coated with Ni₃(HITP)₂. This condensation causes asymmetric wetting on the fiber surface, generating a potential difference, which allows electricity to flow. Through this process, the research team successfully achieved a maximum power density of 2.6 μW/cm³ and an energy density of 1.1 mJ/cm³. Notably, UiO-66-NH₂ exhibited excellent moisture adsorption and desorption performance, not only under normal conditions but also in low-humidity environments, showing its potential for use in various settings. The team conducted experiments simulating real climate conditions—including desert, coastal, and inland environments—and confirmed that the system could stably generate moisture and electricity autonomously across all tested scenarios. Professor Taekwang Yoon stated: “This research demonstrates the feasibility of a self-sustaining energy harvesting system that can operate without any external power or water supply. We hope it serves as a viable solution in disaster zones or areas with limited access to electricity.” Principal Researcher Giro Yoon added: “This system provides a technological foundation for easy electricity generation, even in extreme climates or regions lacking infrastructure. We expect this to make a meaningful contribution to sustainable energy technologies for a carbon-neutral society.” This research was supported by the National Research Foundation of Korea under the Global Research Infrastructure Cooperation Hub Program. [Energy Harvesting] refers to the technology of collecting energy from natural sources—such as sunlight, vibrations, heat, wind, waves, or even waste energy from daily life—and converting it into usable electrical energy. From the back row, starting from the left : Professor Taekwang Yoon (Ajou University), Researcher Dongyeon Kim (KAIST), Principal Researcher Giro Yoon (KITECH), Researcher Yonggyun Lee (Ajou University), and Researcher Jihyun Lee (Hanyang University)