Photophysical Ion Dynamics in Hybrid Perovskite MAPbX3 (X=Br, Cl) Single Crystals
Artikel i vetenskaplig tidskrift, 2024
next-generation photovoltaic materials. However, there is a debate regarding
the impact of interactions between the organic center and the surrounding
inorganic cage on the solar cell’s high diffusion lengths. It remains unclear
whether the diffusion mechanism is consistent across various halide
perovskite families and how light illumination affects carrier lifetimes. The
focus is on ion kinetics of (CH3NH3)PbX3 (X = Br, Cl) perovskite halide single
crystals. Muon spectroscopy (𝝁+SR)is employed to investigate the
fluctuations and diffusion of ions via the relaxation of muon spins in local
nuclear field environments. Within a temperature range of 30–340 K, ion
kinetics are studied with and without white-light illumination. The results
show a temperature shift of the tetragonal-orthorhombic phase transition on
the illuminated samples, as an effect of increased organic molecule
fluctuations. This relation is supported by density functional theory
(DFT) calculations along the reduction of the nuclear field distribution width
between the phase transitions. The analysis shows that, depending on the
halide ion, the motional narrowing from H and N nuclear moments
represents the molecular fluctuations. The results demonstrate the
importance of the halide ion and the effect of illumination on the compound’s
structural stability and electronic properties.
muon spin spectroscopy
organic-inorganic hybrid perovskite
ion dynamics
structural stability
Författare
Konstantinos Papadopoulos
Chalmers, Fysik, Materialfysik
Ola Kenji Forslund
Universität Zürich
Uppsala universitet
Stephen P. Cottrell
ISIS Neutron and Muon Source
Koji Yokoyama
ISIS Neutron and Muon Source
Pabitra K. Nayak
Tata Institute of Fundamental Research
Francoise Mystere Amombo Noa
Chalmers, Kemi och kemiteknik, Kemi och biokemi
Lars Öhrström
Chalmers, Kemi och kemiteknik, Kemi och biokemi
Elisabetta Nocerino
Stockholms universitet
Lars Börjesson
Chalmers, Fysik, Materialfysik
Jun Sugiyama
Comprehensive Research Organization for Science and Society (CROSS)
Martin Mansson
Kungliga Tekniska Högskolan (KTH)
Yasmine Sassa
Chalmers, Fysik, Materialfysik
Advanced Physics Research
2751-1200 (ISSN) 2751-1200 (eISSN)
2300120Drivkrafter
Hållbar utveckling
Styrkeområden
Energi
Materialvetenskap
Fundament
Grundläggande vetenskaper
Ämneskategorier
Atom- och molekylfysik och optik
Den kondenserade materiens fysik
Infrastruktur
Chalmers materialanalyslaboratorium
DOI
10.1002/apxr.202300120