SUPPLEMENTARY INFORMATION for Scaling law for excitons in 2D

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Scaling law for excitons in 2D perovskite quantum wells ..... quasi-2D screened Coulomb interaction resulting from an average over step-like representations.
SUPPLEMENTARY INFORMATION for Scaling law for excitons in 2D perovskite quantum wells J.-C. Blancon1*, A. V. Stier1, H. Tsai1,2, W. Nie1, C. C. Stoumpos3, B. Traoré4, L. Pedesseau5, M. Kepenekian4, F. Katsutani6, G. T. Noe6, J. Kono2,6,7, S. Tretiak1, S. A. Crooker1, C. Katan4, M. G. Kanatzidis3,8, J. J. Crochet1, J. Even5* and A. D. Mohite1,9* 1

Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

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Department of Materials Science and Nanoengineering, Rice University, Houston, Texas 77005, USA. 3

Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA.

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Univ Rennes, ENSCR, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France. 5

Univ Rennes, INSA Rennes, CNRS, Institut FOTON - UMR 6082, F-35000 Rennes, France.

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Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA. 7

Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA.

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Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA. 9

Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, USA. *Correspondence to: [email protected], [email protected], [email protected]

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Supplementary Figure 1. Phase purity and crystal structure of RPPs with n=1 to 5. a, X-ray diffraction spectra in the low diffraction angle region (