How low-dimensionality alters carrier separation and energy transport in halide perovskites
ORAL
Abstract
Low dimensional halide perovskite nanostructures, such as 2D sheets and nanoparticles, are known to have tunable optical gaps and improved structural stability. Using first-principles calculations, we show that dimensional reduction leads to modified excited state dynamics. In 2D hybrid organic–inorganic perovskites, we find that the formation of localized layer edge states leads to efficient electron–hole dissociation. These layer edge states are stabilized by internal electric fields created by polarized molecular alignment of organic cations in 2D perovskites two layers or thicker, suggesting that control over these molecular components would lead to control over layer edge optoelectronic properties.
–
Presenters
-
Liang Tan
Lawrence Berkeley National Laboratory, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA, Molecular Foundry, Lawrence Berkeley National Lab, Lawrence Berkeley National Laboratory, USA, Molecular Foundry, Lawrence Berkeley National Laboratory
Authors
-
Jisook Hong
Lawrence Berkeley National Laboratory
-
David Prendergast
Lawrence Berkeley National Laboratory, Lawrence Berkeley National Lab
-
Liang Tan
Lawrence Berkeley National Laboratory, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA, Molecular Foundry, Lawrence Berkeley National Lab, Lawrence Berkeley National Laboratory, USA, Molecular Foundry, Lawrence Berkeley National Laboratory