Morphology-Dependent One- and Two-Photon Absorption Properties in Blue Emitting CsPbBr₃ Nanocrystals.

ABSTRACT: The linear and nonlinear optical parameters and morphologic dependence of CsPbBr₃ nanocrystals (NCs) are crucial for device engineering. In particular, such information in asymmetric nanocrystals is still insufficient. We characterized the OPLA (σ¹) and TPA cross sections (σ²) of a series CsPbBr₃ nanocrystals with various aspect ratios (AR) using femtosecond transient absorption spectroscopy (TAS). The σ¹ presents a linear volume dependence of all the samples, which agrees with the previous behavior in CsPbBr₃ QDs. However, the σ² values do not exhibit conventional power dependency of the crystal volume but are also modulated by the shape-dependent local field factors. In addition, the local field effect in CsPbBr

SUBMITTER: Alvarez SLG 

PROVIDER: S-EPMC9189923 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature