Ultrafast vibrational control of organohalide perovskite optoelectronic devices using vibrationally promoted electronic resonance
OPEN ACCESS
Loading...
Author / Producer
Date
2024-01
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Rights / License
Abstract
Vibrational control (VC) of photochemistry through the optical stimulation of structural dynamics is a nascent concept only recently demonstrated for model molecules in solution. Extending VC to state-of-the-art materials may lead to new applications and improved performance for optoelectronic devices. Metal halide perovskites are promising targets for VC due to their mechanical softness and the rich array of vibrational motions of both their inorganic and organic sublattices. Here, we demonstrate the ultrafast VC of FAPbBr(3) perovskite solar cells via intramolecular vibrations of the formamidinium cation using spectroscopic techniques based on vibrationally promoted electronic resonance. The observed short (similar to 300 fs) time window of VC highlights the fast dynamics of coupling between the cation and inorganic sublattice. First-principles modelling reveals that this coupling is mediated by hydrogen bonds that modulate both lead halide lattice and electronic states. Cation dynamics modulating this coupling may suppress non-radiative recombination in perovskites, leading to photovoltaics with reduced voltage losses.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
23 (1)
Pages / Article No.
88 - 94
Publisher
Nature
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Organisational unit
03934 - Kovalenko, Maksym / Kovalenko, Maksym
Notes
Funding
192308 - Q-Light - Engineered Quantum Light Sources with Nanocrystal Assemblies (SNF)
Related publications and datasets
Is supplemented by: 10.5281/zenodo.8398385