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Akkerman QA, Motti SG, Srimath Kandada AR, et al. Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control. J Am Chem Soc. 2016;138(3):1010-6doi: 10.1021/jacs.5b12124.
Akkerman, Q. A., Motti, S. G., Srimath Kandada, A. R., Mosconi, E., D'Innocenzo, V., Bertoni, G., Marras, S., Kamino, B. A., Miranda, L., De Angelis, F., Petrozza, A., Prato, M., & Manna, L. (2016). Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control. Journal of the American Chemical Society, 138(3), 1010-6. https://doi.org/10.1021/jacs.5b12124
Akkerman, Quinten A, et al. "Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control." Journal of the American Chemical Society vol. 138,3 (2016): 1010-6. doi: https://doi.org/10.1021/jacs.5b12124
Akkerman QA, Motti SG, Srimath Kandada AR, Mosconi E, D'Innocenzo V, Bertoni G, Marras S, Kamino BA, Miranda L, De Angelis F, Petrozza A, Prato M, Manna L. Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control. J Am Chem Soc. 2016 Jan 27;138(3):1010-6. doi: 10.1021/jacs.5b12124. Epub 2016 Jan 14. PMID: 26726764; PMCID: PMC4731826.
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J Am Chem Soc. 2016 Jan 27;138(3):1010-6. doi: 10.1021/jacs.5b12124. Epub 2016 Jan 14.

Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control.

Journal of the American Chemical Society

Quinten A Akkerman, Silvia Genaro Motti, Ajay Ram Srimath Kandada, Edoardo Mosconi, Valerio D'Innocenzo, Giovanni Bertoni, Sergio Marras, Brett A Kamino, Laura Miranda, Filippo De Angelis, Annamaria Petrozza, Mirko Prato, Liberato Manna

Affiliations

  1. Nanochemistry Department, Istituto Italiano di Tecnologia , Via Morego 30, 16163 Genova, Italy.
  2. Università degli Studi di Genova , Via Dodecaneso, 31, 16146, Genova, Italy.
  3. Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia , Via Giovanni Pascoli 70/3, 20133 Milano, Italy.
  4. Dipartimento di Fisica, Politecnico di Milano , Piazza Leonardo da Vinci, 32, 20133 Milano, Italy.
  5. Computational Laboratory for Hybrid/Organic Photovoltaics, CNR-ISTM , Via Elce di Sotto, 06123 Perugia, Italy.
  6. IMEM-CNR , Parco Area delle Scienze 37/A, 43124 Parma, Italy.
  7. Centre for Innovation and Enterprise, OxfordPV Ltd. , Begbroke Science Park, Woodstock Road, Oxford OX5 1PF, United Kingdom.
  8. CompuNet, Istituto Italiano di Tecnologia , Via Morego 30, 16163 Genova, Italy.

PMID: 26726764 PMCID: PMC4731826 DOI: 10.1021/jacs.5b12124

Abstract

We report a colloidal synthesis approach to CsPbBr3 nanoplatelets (NPLs). The nucleation and growth of the platelets, which takes place at room temperature, is triggered by the injection of acetone in a mixture of precursors that would remain unreactive otherwise. The low growth temperature enables the control of the plate thickness, which can be precisely tuned from 3 to 5 monolayers. The strong two-dimensional confinement of the carriers at such small vertical sizes is responsible for a narrow PL, strong excitonic absorption, and a blue shift of the optical band gap by more than 0.47 eV compared to that of bulk CsPbBr3. We also show that the composition of the NPLs can be varied all the way to CsPbBr3 or CsPbI3 by anion exchange, with preservation of the size and shape of the starting particles. The blue fluorescent CsPbCl3 NPLs represent a new member of the scarcely populated group of blue-emitting colloidal nanocrystals. The exciton dynamics were found to be independent of the extent of 2D confinement in these platelets, and this was supported by band structure calculations.

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