Next-Generation Optoelectronic Nanomaterials Lab

We develop solution-processed semiconductor nanomaterials and emerging optoelectronic devices by integrating materials chemistry, surface engineering, photophysics, and device science. Ultimately, we seek to discover new materials, mechanisms, and device concepts that redefine the future of optoelectronics and displays. It is important to selectively deposit the nanocrystal arrays onto the desired locations of thin-film devices or integrated (opto)electronic circuitry by using precise material-adapted patterning methods. Stretchable optoelectronics represents a key direction for next-generation devices, enabling electronic and photonic systems that can deform without losing functionality. By combining mechanical flexibility with stable optical performance, these systems open pathways toward wearable displays, electronic skin, and human–machine interfaces. Our group is developing a new optical neuromorphic that processes image data efficiently using light and electrical signals. It uses colloidal semiconducting quantum dots and perovskite nanocrystals as a light-sensing layer, enabling on-chip learning and overcoming limitations of traditional computing. Sun Jae's article "Direct Optical Lithography of Intrinsically Stretchable Colloidal Emissive Nanocrystals" has been published in Nano Letters. Bokyeong's article "Unraveling the Effect of Metal Halide Complex on the Surface Chemistry of InP Quantum Dots" has been published in Chemistry of Materials. Mingyu's article "Kinetically Controlled Direct in situ Photolithography of Perovskite Color-Conversion Layers" has been published in Small. Jun-Seo's article "Highly Bright Deep-Blue Perovskite Light-Emitting Diodes via Dual-Passivating Additive-Based Synergetic Solid-State Halide Exchange" has been published in Advanced Op