This research aims to effectively control defects in perovskite light-emitting materials, which are receiving significant attention as next-generation emission materials for ultra-realistic displays, through an innovative method utilizing crystal polymorphs. The goal is to develop high color purity, high efficiency, and high-performance red perovskite light-emitting diodes(PeLEDs).

Professor Hobeom Kim's proposed perovskite defect control technology uses crystal polymorphs with the same chemical structure, unlike conventional methods that use external chemical species. This approach is expected to increase material uniformity and crystallinity while dramatically reducing defect density, potentially opening a new chapter in perovskite light-emitting diode research thereby.

Highly crystalline perovskites with effectively controlled defects can be applied to light-emitting diodes as well as various next-generation stacked semiconductor devices such as solar cells and neuromorphic devices. This technology is expected to contribute to the future innovative growth of related industries, including ultra-realistic display and micro-display.