Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control
Italian Institute of Technology · University of Genoa · +5 more institutions
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…
Citation impact
- FWCI
- 74.20
- Percentile
- 100%
- References
- 49
Authors
13- QAQuinten A. AkkermanCorresponding
Italian Institute of Technology, University of Genoa
- SGSilvia G. Motti
Italian Institute of Technology, Center for Nano Science and Technology, Politecnico di Milano
- ARAjay Ram Srimath Kandada
Italian Institute of Technology, Center for Nano Science and Technology
- EMEdoardo Mosconi
Institute of Molecular Science and Technologies
- VDValerio D’Innocenzo
Italian Institute of Technology, Center for Nano Science and Technology, Politecnico di Milano
Topics & keywords
- Chemistry
- Monolayer
- Halide
- Nucleation
- Caesium
- Perovskite (structure)
- Exciton
- Colloid