Year: 2025
Type: article
Abstract: The high optoelectronic quality of halide perovskites makes them suitable for use in optoelectronic devices and, recently, in emerging quantum emission applications. Advancements in perovskite nanomaterials have led to the discovery of processes in which luminescence decay times are below 100 picoseconds, stimulating the exploration of even faster radiative rates for advanced quantum applications, which have only been realized in III-V materials grown using costly epitaxial growth methods. Here we discovered ultrafast quantum transients with timescales of around two picoseconds at low temperature in bulk formamidinium lead iodide films grown via scalable solution or vapour approaches. Using a multimodal strategy, combining ultrafast spectroscopy, optical and electron microscopy, we show that these transients originate from quantum tunnelling in nanodomain superlattices. The outcome of the transient decays, that is, photoluminescence, mirrors the photoabsorption of the states, with an ultranarrow linewidth at low temperature that can reach <2 nm (~4 meV). Localized correlation of the emission and structure reveals that the nanodomain superlattices are formed by alternating ordered layers of corner-sharing and face-sharing octahedra. This discovery opens new applications leveraging intrinsic quantum properties and demonstrates powerful multimodal approaches for quantum investigations.
Source: Nature Nanotechnology
Authors: Dengyang Guo, Thomas A. Selby, Simon Kahmann, Sebastian Gorgon, Linjie Dai, Milos Dubajic, Terry Chien-Jen Yang, Simon M. Fairclough, Thomas Marsh, Ian E. Jacobs, Baohu Wu, Renjun Guo, Satyawan Nagane, Tiarnan A. S. Doherty, Kangyu Ji, Cheng Liu, Yang Lu, Taeheon Kang, Capucine Mamak, Jian Mao, Peter Müller-Buschbaum, Henning Sirringhaus, Paul A. Midgley, Samuel D. Stranks
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $12,690
Funders: Diamond Light Source, UK Research and Innovation, Leverhulme Trust, Royal Society, Research Councils UK, University of Cambridge, European Commission, National Natural Science Foundation of China, Isaac Newton Trust, Tata Sons, HORIZON EUROPE Framework Programme, Engineering and Physical Sciences Research Council
Awards: G1033901474, G1533276632, G1684323015, G2122825666, G2366007962, Centre for Advanced Materials for Integrated Energy Systems (CAM-IES), Earth-abundant catalysts and novel layered 2D perovskites for solar water splitting (H2CAT), EPSRC Centre for Doctoral Training in Integrated Functional Nano (i4Nano), Social Signal Processing Network, G4106736275, G4223424634, G4298533165, G434337789, G4484408413, G4509676128, Covariant quantization of the superstring, Rich Nonlinear Tomography for advanced materials, G4681169994, TOSPEL Transient operando spectroscopy of perovskite nanocrystal LEDs, G5089167665, Strain manipulation for Halide Perovskite Performance Improvements, Multi-Dimensional Electron Microscope, G5820086322, ECCS-EPSRC Superlattice Architectures for Efficient and Stable Perovskite LEDs, G6344692978, G680116334, G708391930, G7386108879, Sir Henry Royce Institute - Cambridge Equipment, Affordable Perovskite Solar Irrigation Systems for Small-holder Farmers in Ethiopia (APSISSFE), G7558375840, G7707145192, Copper-based Perovskites with Horizontal Transition Dipole Moment for Highly Efficient Light-emitting Diodes, The Origin of Non-Radiative Losses in Metal Halide Perovskites, G8069729576, Lightweight and Flexible All-Perovskite Triple-junction Solar Cells, Sir Henry Royce InsStitute - recurrent grant, G8208865368, G8727900174, G8858639103
OpenAlex ID: W4415655274