Surface and optical properties of phase-pure silver iodobismuthate nanocrystals

Abstract

Phase-pure and highly crystalline AgBiI4 NCs are synthesized by hot-injection synthesis route. The iodine-rich surface of the NCs enable their impressive long-term environmental and thermal stabilities. This study shines light on the surface-electronic structure relationship for AgBiI4 NCs.

Probing compositional engineering effects on lead-free perovskite-inspired nanocrystal thin films using correlative nonlinear optical microscopy

“…Previous works have revealed the exceptionally high nonlinear absorption coefficients of perovskites, [13][14][15][16] providing a strong basis for studying the spatially resolved multiphoton absorptioninduced luminescence (MPL) from many forms of these materials. For example, MPL microscopy is an emerging technique to examine the optical quality (i.e., homogeneity and heterogeneity) of perovskite materials at high spatial resolution, [17][18][19] and provides unprecedented spatial localization of trap-states and carrier dynamics within the perovskite material that cannot be depth-resolved by its single-photon imaging counterpart. 20,21 Equally important nonlinear phenomena that do not rely on absorption effects have been discovered in perovskites, 22 allowing additional modifications in their overall optoelectronic performance.…”