Light Absorption Coefficient of CsPbBr3 Perovskite Nanocrystals
Year: 2018
Type: article
Abstract: Inductively coupled plasma mass spectrometry (ICP-MS) was combined with UV–vis absorption spectroscopy and transmission electron microscopy to determine the size, composition, and intrinsic absorption coefficient μ i of 4 to 11 nm sized colloidal CsPbBr 3 nanocrystals (NCs). The ICP-MS measurements demonstrate the nonstoichiometric nature of the NCs, with a systematic excess of lead for all samples studied. Rutherford backscattering measurements indicate that this enrichment in lead concurs with a relative increase in the bromide content. At high photon energies, μ i is independent of the nanocrystal size. This allows the nanocrystal concentration in CsPbBr 3 nanocolloids to be readily obtained by a combination of absorption spectroscopy and the CsPbBr 3 sizing curve.
Institutions: Ghent University, KU Leuven, Columbia University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2804959180