A5067811180- Photoreceptor and optogenetics research
- Neural dynamics and brain function
- Perovskite Materials and Applications
- Advanced Chemical Physics Studies
- Spectroscopy and Quantum Chemical Studies
- Molecular Junctions and Nanostructures
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Electron and X-Ray Spectroscopy Techniques
- Molecular Communication and Nanonetworks
- Retinal Development and Disorders
- Magnetism in coordination complexes
- Quantum and electron transport phenomena
- Advanced Semiconductor Detectors and Materials
- Laser-Matter Interactions and Applications
- Organic Electronics and Photovoltaics
- Nuclear reactor physics and engineering
- Nuclear Materials and Properties
- Advancements in Photolithography Techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Neuroscience and Neuropharmacology Research
- Advanced Electron Microscopy Techniques and Applications
- Semiconductor Quantum Structures and Devices
- Photochromic and Fluorescence Chemistry
- Machine Learning in Materials Science
University of Cambridge
2017-2020
Institut de Physique et Chimie des Matériaux de Strasbourg
2013-2016
Université de Strasbourg
2013-2016
Centre National de la Recherche Scientifique
2013-2016
Self-assembled hybrid perovskite quantum wells have attracted attention due to their tunable emission properties, ease of fabrication and device integration. However, the dynamics excitons in these materials, especially how they couple phonons remains an open question. Here, we investigate two widely used namely butylammonium lead iodide $(CH_3(CH_2)3NH_3)2PbI_4$ hexylammonium $(CH_3(CH_2)5NH_3)2PbI_4$, both which exhibit broad photoluminescence tails at room temperature. We performed...
Donor-acceptor organic solar cells often show low open-circuit voltages (V OC) relative to their optical energy gap (E g) that limit power conversion efficiencies ~12%. This loss is partly attributed the offset between E g and of intermolecular charge transfer (CT) states at donor-acceptor interface. Here we study generation occurring in PIPCP:PC61BM, a system with very driving for initial separation g-E CT ~ 50 meV) high internal quantum efficiency (η IQE 80%). We track strength electric...
CdSe/CdTe core–crown type-II nanoplatelet heterostructures are two-dimensional semiconductors that have attracted interest for use in light-emitting technologies due to their ease of fabrication, outstanding emission yields, and tunable properties. Despite this, the exciton dynamics these complex materials, particular how they influenced by phonons, is not yet well understood. Here, we a combination femtosecond vibrational spectroscopy, temperature-resolved photoluminescence (PL),...
Singlet fission is the spin-allowed conversion of a photogenerated singlet exciton into two triplet excitons in organic semiconductors, which could enable single-junction photovoltaic cells to break Shockley–Queisser limit. The singlets free triplets mediated by an intermediate correlated pair (TT) state, but understanding how formation and dissociation these states depend on energetics morphology lacking. In this study, we probe dynamics TT model endothermic system, TIPS-Tc nanoparticles,...
Counter-intuitive photochemistry: in Anabaena Sensory Rhodopsin, the retinal 13-<italic>cis</italic> isomer isomerizes much faster than all-<italic>trans</italic> ASR, but with a 3-times lower quantum yield.
Ultrafast vibrational spectroscopy is employed to obtain real-time structural information on energy transport in double-walled light-harvesting nanotubes at room temperature, stabilized a host matrix mimic the rigid scaffolds of natural systems. We observe evidence low-frequency mode 315 cm–1, which transfers excitons from outer wall crossing point through transfer inner can occur. This furthermore absent solution phase. Importantly, coherence this not transferred upon and only present...
(Chem 6, 2826–2851; October 8, 2020) In the originally published article, as a result of typesetting error, Figures 2, 5, and 6 were unfortunately misplaced such that graphics did not match their respective legends: Figure 2 showed graphic meant to be 5 5. These errors do affect any underlying data, but The Journal sincerely apologizes for confusion they may have caused. figures now appear correctly in online version article. Optical Projection Spatial Separation Spin-Entangled Triplet Pairs...
Femtosecond broadband pump-probe spectroscopy disentangles the ultrafast photo-isomerization kinetics of all-trans and 13-cis retinal in ASR. At odds with conventional picture, faster reaction displays a smaller photo-product quantum yield.
The S1 (21Ag-) state is an optically dark of natural and synthetic pi-conjugated materials that can play a critical role in optoelectronic processes such as, energy harvesting, photoprotection singlet fission. Despite this widespread importance, direct experimental characterisations the electronic structure wavefunction have remained scarce uncertain, although advanced theory predicts it to rich multi-excitonic character. Here, studying archetypal polymer, polydiacetylene, carotenoids, we...