A research team led by Professor Kim Young-hoon of the Department of Energy Engineering together with a research team led by Professor Kwon Woo-sung of the Department of Chemical and Biological Engineering at Sookmyung Women's University recently developed "glass particle-based phosphor," which will be used in next-generation blue phosphorescent light emitting diodes. The research means the advancement of technology for expressing various colors of light using electric energy. By successfully demonstrating glass particle-based spontaneous light-emitting diodes as a first in the world, the research team overcame the limitation of display technology.

Professor Kim who proposed a potential solution to the blue light emitting diode issue developed "palladium-based chiral perovskite materials" last June with the world's highest asymmetry, a material that can be used in next-generation spintronics device.

Moreover, last year, he developed a "photocatalyst material for reducing carbon dioxide and wastewater decomposition using solar energy" to prepare for global warming and climate change. This technology can reduce organic matter in wastewater and carbon dioxide in the atmosphere with only solar energy, without the need for external devices. It has been recognized as a significant photocatalyst material that can be instrumental in achieving a carbon-neutral society in the future.

We spoke to Professor 토토사이트 프리미어토토 who is working to contribute to the advancement of the next generation energy engineering technology.

Display technology is one of the most relevant optical application technologies in daily life, and it uses electric 토토사이트 프리미어토토 to generate lights of various colors. Simply put, it is the technology that allows light to be emitted by applying electricity to display devices such as smartphones and monitors.

The emission mechanism of Organic Light-Emitting Diodes (OLEDs), commonly used in display technology, is categorized into first-generation emitters called "fluorescence" and second-generation emitters called "phosphorescence." Among these, green and red OLEDs use highly efficient second-generation phosphorescence with 100% emission efficiency, however, blue OLEDs, due to lower stability, still rely on first-generation fluorescence with only 25% emission efficiency. Through this research, Professor Kim has implemented a "blue phosphorescent material and light-emitting diode" that can operate stably.

Conventional glass particle-based emitters face limitations in inducing desired light under dark environments or specific light sources, making them difficult to apply in display technology. Glass particles are insulators that lack electrical conductivity, so it's hard to induce light emission even with external electricity. Professor Kim overcame this limitation by embedding glass particles into a highly conductive "organic matrix."

Professor Kim added amine functional groups during the emitter synthesis process to achieve a triplet energy state and stabilized it using a glass particle matrix, inducing high-brightness blue phosphorescent emission. "When synthesizing glass particles, typically only silicon and oxygen atoms are added," said Professor Kim. "Adding amine functional groups during this process causes a chemical reaction, which forms an emission layer between the glass particles."

For the past decade, with the goal of seeking the efficiency and stability of light-emitting diodes, Professor Kim has continued research to find new emitters. Regarding the background of the research, he explained, "In addition to organic and inorganic emitters, I am conducting research that uses new emitters such as perovskite emitters, carbon nanodot emitters, and carbon-nitride (C3N4) emitters, which have not widely been used before, and applies them to light-emitting diodes," adding, "Blue phosphorescent light-emitting diode device is the new emitters that resulted from this research process."

Professor Kim who "wants to conduct research that benefits humanity and society" is a faculty member of the Department of Energy Engineering, and he is advancing studies for enhancing the efficiency of energy interconversion, such as converting electrical energy into light energy like displays, converting light energy into chemical energy like photocatalysts, and converting electrical energy into chemical energy like electrocatalysts.

Regarding future research, he said, "I aim to develop not just display but also high-efficiency catalysts for hydrogen production and carbon dioxide reduction to address global warming and energy depletion issues facing humanity."

Professor Kim emphasized the role of a professor as an educator: "My primary mission is to guide students well so that they become good researchers who contribute to humanity." He added, "I am planning research areas and directions that will engage students and help them grow well."

Regarding the most memorable moment during his research, he picked "the progress of students." Professor Kim said, "It is most impressive to see students, who were inexperienced at the time of admission, develop over time," adding, "I was especially struck by the noticeable growth of the first author of this study, who showed remarkable improvement just one year after admission."

To Hanyang University students interested in energy engineering, he said, "Every student is intelligent and has immense potential for growth," adding, "I hope you strive to 'get out of your comfort zone' by studying and researching diligently, experiencing the wider world, and overcoming your limit, to work for greater goods of contributing to humanity and society through."

Professor Kim mentioned the importance of "discussion and collaboration with others" in overcoming challenges and achieving growth. "When I faced problems during research, I sought help and, when needed, offered assistance to others," he recalled. "Such interactions helped me grow as a person."

Finally, Professor Kim stressed, "The true owners of a school are its students, and professors should play a role in supporting their growth." Highlighting the global excellence of the Department of Energy Engineering faculty in both research and education, he remarked, "I hope students will learn as much as possible from their professors and enhance their own capabilities through this."