Light Absorption Coefficient of CsPbBr3 Perovskite Nanocrystals.
Jorick MaesLieve BalcaenEmile DrijversQiang ZhaoJonathan De RooAndré VantommeFrank VanhaeckePieter GeiregatZeger HensPublished in: The journal of physical chemistry letters (2018)
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 μi of 4 to 11 nm sized colloidal CsPbBr3 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, μi is independent of the nanocrystal size. This allows the nanocrystal concentration in CsPbBr3 nanocolloids to be readily obtained by a combination of absorption spectroscopy and the CsPbBr3 sizing curve.
Keyphrases
- mass spectrometry
- high resolution
- room temperature
- electron microscopy
- multiple sclerosis
- capillary electrophoresis
- ms ms
- high performance liquid chromatography
- liquid chromatography
- solid state
- magnetic resonance imaging
- high efficiency
- solar cells
- quantum dots
- fluorescent probe
- ionic liquid
- tandem mass spectrometry