May 11, 2023 (Thu) Dr. Changyeol Lee

Development of Perovskite Quantum Dots with High Structural Stabilities

and Their Light-Emitting Diode Applications

Abstract: 

Perovskite QDs have been attracted lots of attentions as emissive materials for next generation display due to their outstanding opto-electrical properties. However, poor structural stabilities are weakness of perovskite QDs and must be solved. Perovskite QDs with highly structural stability were solved by utilizing (1) UV-crosslinking ligand¹, (2) core-shell structure² and (3) alkali metal doping. These methods enhanced structural stabilities of perovskite QDs by minimizing ligand dissociation and defect generation.³

References

1. LEE, H., JEONG, J. W., SO, M. G., JUNG, G. Y., LEE C.-L., Design of Chemically Stable Organic Perovskite Quantum Dots for Micropatterned Light-Emitting Diodes through Kinetic Control of a Cross-Linkable Ligand System. Adv. Mater.,2021, 33, 2007855.

2. TRINH, K. C., LEE, H., SO, M. G., LEE C.-L., Synthesis of Chemically Stable Ultrathin SiO2-Coated Core–Shell Perovskite QDs via Modulation of Ligand Binding Energy for All-Solution-Processed Light-Emitting Diodes. ACS Appl. Mater. Interfaces, 2021, 13, 29798–29808.

3. LEE, H., TRINH, K. C., SO, M. G., LEE C.-L., Sequential Structural Degradation of Red Perovskite Quantum Dots and Its Prevention by Introducing Iodide at a Stable Gradient Concentration into the Core–Shell Red Perovskite Quantum Dots. Nanoscale, 2022, 14, 3425-3440.