Professor Choi Seok-won’s Research Team at Kyung Hee University Develops New Materials for Next-Generation Optoelectronic Devices

Professor Choi Seok-won’s research team from the Department of Information and Electronic Materials Engineering at Kyung Hee University, in collaboration with Professor Kim Dong-ha from Ewha Womans University and Dr. Fumito Araoka from Japan’s RIKEN, has developed a perovskite-liquid crystal nano composite new material. This new material is expected to be utilized in various fields such as circularly polarized displays, lasers, sensors, optical communications, security, and quantum computing.

Perovskite possesses excellent electronic and optical properties. It is widely used in advanced industries such as solar cells and light-emitting diodes. To harness these properties, the molecular asymmetry of perovskite must be maintained. Maintaining molecular asymmetry requires complex chemical design and synthesis, such as adding chemical components outside the perovskite or introducing asymmetric substances inside the molecules.

The research team created a nanoscale helical structure framework in liquid crystals and grew two-dimensional perovskite on it, enabling the characteristic electronic and optical properties such as circularly polarized luminescence and circular dichroism absorption without the molecular asymmetry of perovskite. Additionally, to overcome perovskite’s vulnerability to moisture, they effectively addressed this by forming a composite with hydrophobic liquid crystal materials.

Professor Choi Seok-won stated, “By combining materials with completely different properties and forms, characteristics that could not be expressed in existing materials were realized,” and added, “We hope that the developed new material will be utilized as an advanced material in next-generation optoelectronic devices such as quantum computing.”

This research achievement, led as co-first authors by Choi Yong-jun (master’s course) and Lee Jae-jin (doctoral course), BK21 Four Frontier Materials Convergence Major students in the Department of Information and Electronic Materials Engineering at Kyung Hee University, was published online in 'ACS Nano,' a world-renowned journal in the field of nanoscience published by the American Chemical Society.

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