A research collaboration between Professor Jiwoong Yang's team at DGIST and Professor Moon Kee Choi's team at UNIST has resulted in significant advancements in wearable display technology. By leveraging perovskite quantum dots and employing selective surface modification techniques, the teams have overcome historical limitations of red perovskite materials, enhancing both stability and electrical properties. The substitution of iodine with bromine in the surface treatment process has played a pivotal role, enlarging perovskite structures and improving surface-to-volume ratios while maintaining crucial band gap energies. This innovation has led to the development of high-efficiency, skin-attachable perovskite pure red light-emitting devices, boasting an impressive external quantum efficiency (EQE) of up to 19.8%.
The implication promises broader applications in fields such as virtual reality (VR), augmented reality (AR), and smart wearable devices. The research not only brings us closer to the commercialization of pure red perovskite displays but also underscores the versatility and potential of perovskite materials in various technological domains. Supported by the Ministry of Science and ICT, the National Research Foundation of Korea, and the Pohang Accelerator Laboratory, this pioneering work has been recognized with publication in the prestigious journal "Materials Today," marking a significant step forward in the realm of wearable technology.
