The flow of energy and electron transfer processes in semiconductor nanocrystal based light harvesting assemblies is dictated by the nature of the excited state interactions. Halide perovskite nanocrystals such as CsPbBr3 with relatively high emission yield and strong light absorption can transfer singlet and triplet energy to surface bound acceptor molecules. They can also induce photocatalytic reduction and oxidation by selectively transferring electrons and holes across the nanocrystal interface. Surface interactions of chromophore or redox active molecule which dictate the efficiency of energy/electron transfer thus plays an important role in realizing their photocatalytic and optoelectronic applications. By discussing specific examples we will show how the flow of energy and electrons are managed by CsPbBr3 nanocrystals. The excited state interactions in the CsPbBr3-Rhodamine B (RhB) hybrid assembly and the electron transfer between CsPbBr3 and surface bound viologen will be discussed.

Energy versus Electron Transfer. Tuning excited state chemistry of halide perovskite-molecular hybrids

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.