Phonons are the fingerprint of structure and defects may be associated to structural perturbations. Electronic excitations in most polar semiconductors are strongly coupled to the lattice vibrations, thus, for a comprehensive understanding of the structural-electronic interactions, nature of electron-phonon coupling in perovskites will be characterized.
A large set of top notch optical, vibrational and electronic spectroscopic techniques will be conveyed to reach real time mapping of molecular interactions and structural deformations:
- Ultrafast coherent lattice fluctuation spectroscopy.
- Picoseconds acoustics
- Electronic structure and Carrier Dynamics by time-resolved pump-push photo-electron (tr-PPE) spectroscopy.
- Time-resolved photo-electron spectroscopy and microscopy. Spatially resolved pump&push photo-electron spectroscopy is performed by a commercial and modular Photoemission Electron Microscope (PEEM) coupled to an electron analyser and an optical or electrical “pump” system.