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Light Absorption Coefficient of CsPbBr3 Perovskite Nanocrystals
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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.
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Metadata
- Authors
- Maes, J., Balcaen, L., Drijvers, E., Zhao, Q., De Roo, J., Vantomme, A., Vanhaecke, F., Geiregat, P., & Hens, Z.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-05-23
- Volume
- 9
- Issue
- 11
- Pages
- 3093-3097
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2804959180
- Cited by
- 371
- References
- 30
- FWCI
- 10.35
- Type
- journal article
- Language
- en
- Open access
- green
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