Kim Jae Woo, a Master's student in the Nano Chemistry Major at Kookmin University's Graduate School (President Jeong Seung Ryul), supervised by Professor Kim Young Hoon, has published a review paper titled ‘Comprehensive Review of Core/Shell Nanostructures of Lead-Halide Perovskite Quantum Dots for Improved Optoelectronic Performance and Stability’ in the SCIE-indexed journal Journal of Materials Chemistry A (Impact Factor: 10.8 / JCR rank: 9.1%).

Journal of Materials Chemistry A is an internationally renowned academic journal in the field of materials chemistry, indexed in SCIE (Web of Science), with a focus on energy and sustainable materials research. It specifically covers cutting-edge materials research related to energy conversion and storage, including photovoltaics, catalysts, batteries, fuel cells, solar cells, and thermoelectric materials, encompassing a broad range of topics such as the design of high-efficiency, high-stability functional materials and the elucidation of chemical mechanisms.

This study is a comprehensive review paper presenting a direction for realising high-performance, highly stable optoelectronic devices. It centres on a core/shell nanostructure strategy to overcome the low stability of perovskite quantum dots, applying designs established in existing III–V and chalcogenide quantum dots to the perovskite family.

The paper proposes a core/shell nanostructure formation strategy based on epitaxial growth as a fundamental approach to address the ionic bonding characteristics and surface defect issues that cause instability in perovskite colloidal quantum dots (Pe-CQDs). Specifically, it systematises the effects of lattice mismatch in the shell material, band alignment (type-I/type-II structures), and shell thickness control on optical properties and stability. It then comprehensively analyses various experimental cases demonstrating significant improvements in fluorescence efficiency (PLQY), thermal stability, and water resistance.

Kim Jae Woo, a Master's student in the Nano Chemistry Major at Kookmin University, stated: ‘I wish to continue research aimed at overcoming the fundamental instability limitation of perovskite quantum dots, thereby contributing to the development of stable, high-efficiency optoelectronic materials that can lead to practical commercialisation.’