Properties of exciton in strongly quantum confined lead halide perovskite nanocrystals

Who: Dong Hee Son, Texas A&M
Wednesday, October 20, 2021 - 4:30pm

A CMU Chemistry seminar

Abstract: Metal halide perovskite nanocrystals with the chemically tunable bandgap and superb optical properties are promising candidates for a number of high performance optoelectronic and photonic applications. The majority of studies on perovskites have focused on the large perovskite nanoparticles in the weak confinement regime, however recent synthetic advances have allowed for the preparation of high quality 0D, 1D, and 2D confined perovskites nanocrystals. The access to the strongly confined quantum dots, nanowires and nanoplates enabled the study of confinement effects on various photophysical properties of exciton in perovskites previously not recognized. The presentation will discuss the optical properties in strongly quantum-confined CsPbX3 (X=Cl, Br, I) nanocrystals and their magnetically doped counterparts, which reflect the confinement-enhanced electronic interaction among electron, hole and dopant, opening new pathways of photon and charge emission.    

Zoom link in CMU Chemistry departmental email