Decreasing the electronic confinement in layered perovskites through intercalation† †Electronic supplementary information (ESI) available. CCDC 1487885. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c6sc02848a Click here for additional data file. Click here for additional data file.

Matthew D. Smith,a Laurent Pedesseau,b Mikaël Kepenekian,c Ian C. Smith,a Claudine Katan,c Jacky Even,b,* and Hemamala I. Karunadasaa,* a Department of Chemistry, Stanford University, Stanford, CA 94305, United States b Fonctions Optiques pour les Technologies de l’information, CNRS, INSA de Rennes, 35708 Rennes, France c Institut des sciences chimiques de Rennes, CNRS, Université de Rennes 1, 35042 Rennes, France * [email protected], [email protected]