Rieger J, Hauner J, Niesner D, Fauster T (2023)
Publication Type: Journal article
Publication year: 2023
Original Authors: Janek Rieger, Jonas Hauner, Daniel Niesner, Thomas Fauster
Book Volume: 107
Article Number: 125205
Issue: 12
DOI: 10.1103/PhysRevB.107.125205
Carrier dynamics in metal-halide perovskites, in particular diffusion, has typically been investigated on micrometre-length scales and above. However, surfaces and interfaces modify the carrier dynamics, e.g., by interface band bending and recombination. To investigate the carrier dynamics and diffusion at the surface, we use time-resolved photoelectron spectroscopy which is sensitive to the photoexcited carriers in the topmost few nm of the material. We extract electron mobilities in well-ordered CsPbBr 3 (001) and CsSnBr3(001) films at room temperature of 31±6 and 13±1cm2V−1s−1, respectively. The mobility in CsPbBr3(001) increases to 200±8cm2V−1s−1 at 90 K, indicating strong electron-phonon coupling for electrons at the conduction band minimum. Temperature-dependent photoemission experiments find different phonon coupling mechanisms for high-energetic electrons and holes at the valence band maximum and in the main valence bands.
APA:
Rieger, J., Hauner, J., Niesner, D., & Fauster, T. (2023). Surface carrier dynamics and diffusion in inorganic metal-halide perovskite films. Physical Review B, 107. https://dx.doi.org/10.1103/PhysRevB.107.125205
MLA:
Rieger, Janek, et al. "Surface carrier dynamics and diffusion in inorganic metal-halide perovskite films." Physical Review B 107 (2023).
BibTeX: Download