Tuning the Light Emission Properties by Band Gap Engineering in Hybrid Lead Halide Perovskite
Politecnico di Milano · Italian Institute of Technology · +2 more institutions
Abstract
We report about the relationship between the morphology and luminescence properties of methylammonium lead trihalide perovskite thin films. By tuning the average crystallite dimension in the film from tens of nanometers to a few micrometers, we are able to tune the optical band gap of the material along with its photoluminescence lifetime. We demonstrate that larger crystallites present smaller band gap and longer lifetime, which correlates to a smaller radiative bimolecular recombination coefficient. We also show that they present a higher optical gain, becoming preferred candidates for the realization of CW lasing devices.
Citation impact
- FWCI
- 46.20
- Percentile
- 100%
- References
- 30
Authors
5- VDValerio D’InnocenzoCorresponding
Politecnico di Milano, Italian Institute of Technology, Center for Nano Science and Technology
- ARAjay Ram Srimath Kandada
Italian Institute of Technology, Center for Nano Science and Technology
- MDMichele De Bastiani
Italian Institute of Technology, Center for Nano Science and Technology, University of Padua
- MGMarina Gandini
Center for Nano Science and Technology, Italian Institute of Technology
- APAnnamaria Petrozza
Italian Institute of Technology, Center for Nano Science and Technology
Topics & keywords
- Photoluminescence
- Lasing threshold
- Chemistry
- Trihalide
- Perovskite (structure)
- Crystallite
- Optoelectronics
- Band gap