Color-Tunable Mixed-Cation Perovskite Single Photon EmittersClick to copy article linkArticle link copied!
- Marianna D’AmatoMarianna D’AmatoLaboratoire Kastler Brossel, Sorbonne Universite, CNRS, ENS-PSL Research University, College de France, College de France, 4 place Jussieu, 75252 Paris, Cedex 05, FranceMore by Marianna D’Amato
- Qi Ying TanQi Ying TanCentre for Disruptive Photonic Technologies, The Photonics Institute, 21 Nanyang Link, Nanyang Technological University, Singapore 637371, SingaporeInterdisciplinary Graduate School, Energy Research Institute @NTU (ERI@N), Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, SingaporeMore by Qi Ying Tan
- Quentin GlorieuxQuentin GlorieuxLaboratoire Kastler Brossel, Sorbonne Universite, CNRS, ENS-PSL Research University, College de France, College de France, 4 place Jussieu, 75252 Paris, Cedex 05, FranceMore by Quentin Glorieux
- Alberto Bramati*Alberto Bramati*E-mail: [email protected]Laboratoire Kastler Brossel, Sorbonne Universite, CNRS, ENS-PSL Research University, College de France, College de France, 4 place Jussieu, 75252 Paris, Cedex 05, FranceMore by Alberto Bramati
- Cesare Soci*Cesare Soci*E-mail: [email protected]Centre for Disruptive Photonic Technologies, The Photonics Institute, 21 Nanyang Link, Nanyang Technological University, Singapore 637371, SingaporeDivision of Physics and Applied Physics, 21 Nanyang Link, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, SingaporeMore by Cesare Soci
Abstract
Quantum photonics technologies, like wavelength division multiplexing (WDM), for high-rate quantum key distribution require narrowband, spectrally tunable single photon emitters. Physical methods that rely on the application of large mechanical strain to epitaxial quantum dots or electric and magnetic fields to color centers in 2D metal dichalcogenides provide limited spectral tunability. Here we adopt a chemical approach to synthesize a family of colloidal mixed-cation perovskite quantum dots (Cs1–xFAxPbBr3) that show highly photostable, compositionally tunable single photon emission at room temperature, spanning more than 30 nm in the visible wavelength spectral range. We find that tailoring the stoichiometry of the organic formamidinium (FA) cation in all-inorganic cesium lead bromide (CsPbBr3) perovskite quantum dots detunes the electronic band structure while preserving their excellent single photon emission characteristics. We argue that the mixed-cation perovskite quantum dots studied in this work offer a new platform for the realization of color-tunable single photon emitters that could be readily integrated in a diversity of quantum photonic devices.
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