scholarly journals Electron–phonon coupling in hybrid lead halide perovskites

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Adam D. Wright ◽  
Carla Verdi ◽  
Rebecca L. Milot ◽  
Giles E. Eperon ◽  
Miguel A. Pérez-Osorio ◽  
...  
Keyword(s):  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Halide Perovskites ◽  
Lead Halide

scholarly journals Role of Electron–Phonon Coupling in the Thermal Evolution of Bulk Rashba-Like Spin-Split Lead Halide Perovskites Exhibiting Dual-Band Photoluminescence

2019 ◽  
Vol 4 (9) ◽  
pp. 2205-2212 ◽  
Author(s):  
Julian A. Steele ◽  
Pascal Puech ◽  
Bartomeu Monserrat ◽  
Bo Wu ◽  
Ruo Xi Yang ◽  
...  
Keyword(s):  
Thermal Evolution ◽  
Dual Band ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Halide Perovskites ◽  
Lead Halide

scholarly journals Optical phonons in methylammonium lead halide perovskites and implications for charge transport

2016 ◽  
Vol 3 (6) ◽  
pp. 613-620 ◽  
Author(s):  
Michael Sendner ◽  
Pabitra K. Nayak ◽  
David A. Egger ◽  
Sebastian Beck ◽  
Christian Müller ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Charge Transport ◽  
Optical Phonon ◽  
Optical Phonons ◽  
Phonon Coupling ◽  
Upper Limits ◽  
Electron Phonon Coupling ◽  
Halide Perovskites ◽  
Lead Halide

The measured optical phonon frequencies are used to determine the electron–phonon coupling and upper limits for charge carrier mobilities.

scholarly journals Strong Electron–Phonon Coupling and Self-Trapped Excitons in the Defect Halide Perovskites A3M2I9 (A = Cs, Rb; M = Bi, Sb)

2017 ◽  
Vol 29 (9) ◽  
pp. 4129-4145 ◽  
Author(s):  
Kyle M. McCall ◽  
Constantinos C. Stoumpos ◽  
Svetlana S. Kostina ◽  
Mercouri G. Kanatzidis ◽  
Bruce W. Wessels
Keyword(s):  
Phonon Coupling ◽  
Strong Electron ◽  
Electron Phonon Coupling ◽  
Halide Perovskites

Hot Carrier Dynamics in Lead Halide Perovskites: Mobility and Carrier-Phonon Coupling

2019 ◽  
Author(s):  
Andrés Burgos-Caminal ◽  
Aurélien Willauer ◽  
Ahmad Ajdar Zadeh ◽  
Jacques-E. Moser
Keyword(s):  
Carrier Dynamics ◽  
Phonon Coupling ◽  
Hot Carrier ◽  
Halide Perovskites ◽  
Lead Halide

scholarly journals Monitoring hot exciton dissociation in hybrid lead halide perovskite films with sub-10 fs pulses

2019 ◽  
Vol 205 ◽  
pp. 06019
Author(s):  
Tufan Ghosh ◽  
Sigalit Aharon ◽  
Lioz Etgar ◽  
Sanford Ruhman
Keyword(s):  
Optical Band Gap ◽  
Phonon Coupling ◽  
Exciton Dissociation ◽  
Pump Probe ◽  
Spectral Modulation ◽  
Coherent Wave ◽  
Electron Phonon Coupling ◽  
Weak Regime ◽  
Coupling Strengths ◽  
Lead Halide

Sub-10 fs pump-probe experiments on methylammonium lead halide (MAPbI3) perovskite films show hot exciton dissociation in 20 fs after photo-excitation with ~0.7 eV excess energy compared to its optical band gap (BG). Coherent wave packets were also detected in the form of spectral modulation, revealing electron-phonon coupling in these materials. The estimated electron-phonon coupling strengths from the frequency and amplitude of the detected spectral modulation are in the weak regime, suggesting formation of large polaron.

scholarly journals Ultrastable, cationic three-dimensional lead bromide frameworks that intrinsically emit broadband white-light

2018 ◽  
Vol 9 (6) ◽  
pp. 1627-1633 ◽  
Author(s):  
Chengdong Peng ◽  
Zewen Zhuang ◽  
Huimin Yang ◽  
Guiyang Zhang ◽  
Honghan Fei
Keyword(s):  
White Light ◽  
Light Emission ◽  
Three Dimensional ◽  
Intrinsic Property ◽  
Phonon Coupling ◽  
Strong Electron ◽  
Electron Phonon Coupling ◽  
Lead Bromide ◽  
3D Topology ◽  
Lead Halide

We have discovered the first two lead halide materials adopting a purely cationic inorganic 3D topology. The highly distorted PbII centers afford strong electron–phonon coupling in a deformable lattice and unusual broadband white-light emission as an intrinsic property.

scholarly journals Ultrafast photo-induced enhancement of electron-phonon coupling in metal-halide perovskites

2021 ◽  
Author(s):  
Frédéric Laquai ◽  
Mingcong Wang ◽  
Yajun Gao ◽  
Kai Wang ◽  
Stefaan De Wolf
Keyword(s):  
Carrier Density ◽  
Metal Halide ◽  
Phonon Coupling ◽  
Debye Relaxation ◽  
Dynamic Disorder ◽  
Bandgap Narrowing ◽  
Electron Phonon Coupling ◽  
Excited Carrier ◽  
Halide Perovskites ◽  
Probe Spectroscopy

Abstract In metal-halide perovskites (MHPs), the nature of organic cations affects both, the perovskite’s structure and its optoelectronic properties. Using ultrafast pump-probe spectroscopy, we demonstrate that in state-of-the-art mixed-cation MHPs ultrafast photo-induced bandgap narrowing occurs, and linearly depends on the excited carrier density in the range from 1016 cm− 3 to above 1018 cm− 3. Furthermore, time-domain terahertz (td-THz) photoconductivity measurements reveal that the majority of carriers are localized and that the localization increases with the carrier density. Both observations, the bandgap narrowing and carrier localization, can be rationalized by ultrafast (sub-2ps) photo-induced enhancement of electron-phonon coupling, originating from dynamic disorder, as clearly evidenced by the presence of a Debye relaxation component in the terahertz photoconductivity spectra. The observation of photo-induced enhancement of electron-phonon coupling and dynamic disorder not only provides specific insight into the polaron-strain distribution of excited states in MHPs, but also adds to the development of a concise picture of the ultrafast physics of this important class of semiconductors.

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