scholarly journals Cooperative robustness to dephasing: Single-exciton superradiance in a nanoscale ring to model natural light-harvesting systems

2014 ◽  
Vol 90 (8) ◽  
Author(s):  
G. Luca Celardo ◽  
Paolo Poli ◽  
Luca Lussardi ◽  
Fausto Borgonovi
Keyword(s):  
Light Harvesting ◽  
Natural Light ◽  
Harvesting Systems

scholarly journals All-optical manipulation of singlet exciton transport in individual supramolecular nanostructures by triplet gating

2021 ◽  
Author(s):  
Bernd Wittmann ◽  
Till Biskup ◽  
Klaus Kreger ◽  
Jürgen Köhler ◽  
Hans-Werner Schmidt ◽  
...  
Keyword(s):  
Excitation Energy ◽  
Organic Molecules ◽  
Light Harvesting ◽  
Optical Manipulation ◽  
Natural Light ◽  
Singlet Exciton ◽  
Directed Transport ◽  
Exciton Transport ◽  
All Optical ◽  
Harvesting Systems

Directed transport of singlet excitation energy is a key process in natural light-harvesting systems and a desired feature in assemblies of functional organic molecules for organic electronics and nanotechnology applications....

scholarly journals Modeling the optical properties of excitons in linear and tubular J-aggregates

2006 ◽  
Vol 2006 ◽  
pp. 1-10 ◽  
Author(s):  
Jasper Knoester
Keyword(s):  
Optical Properties ◽  
Fluorescence Spectra ◽  
Light Harvesting ◽  
Cyanine Dyes ◽  
Natural Light ◽  
Artificial Light ◽  
Absorption And Fluorescence Spectra ◽  
Harvesting Systems ◽  
J Aggregates ◽  
Frenkel Excitons

The theory of the optical properties of linear and tubular molecular J-aggregates is reviewed. The primary optical excitations in these systems are Frenkel excitons, which may be delocalized over many molecules. The collective nature of these excitations gives rise to special optical properties and dynamics, which are of interest for purely scientific reasons, but also enable the application of J-aggregates as photographic sensitizers and artificial light-harvesting systems. The focus of this paper is on the effect of aggregate geometry, disorder, and temperature on the absorption and fluorescence spectra. Also transport of excitations between J-aggregates is discussed. Connection is made to experiments on aggregates of cyanine dyes and natural light-harvesting systems.

scholarly journals Broadband 2D Electronic Spectroscopy Reveals a Carotenoid Dark State in Purple Bacteria

Science ◽  
2013 ◽  
Vol 340 (6128) ◽  
pp. 52-56 ◽  
Author(s):  
Evgeny E. Ostroumov ◽  
Rachel M. Mulvaney ◽  
Richard J. Cogdell ◽  
Gregory D. Scholes
Keyword(s):  
Energy Flow ◽  
Light Harvesting ◽  
Purple Bacteria ◽  
Electronic Spectroscopy ◽  
Natural Light ◽  
Dark State ◽  
The Past ◽  
Transfer Processes ◽  
Harvesting Systems ◽  
Underlying Mechanisms

Although the energy transfer processes in natural light-harvesting systems have been intensively studied for the past 60 years, certain details of the underlying mechanisms remain controversial. We performed broadband two-dimensional (2D) electronic spectroscopy measurements on light-harvesting proteins from purple bacteria and isolated carotenoids in order to characterize in more detail the excited-state manifold of carotenoids, which channel energy to bacteriochlorophyll molecules. The data revealed a well-resolved signal consistent with a previously postulated carotenoid dark state, the presence of which was confirmed by global kinetic analysis. The results point to this state’s role in mediating energy flow from carotenoid to bacteriochlorophyll.

Efficient artificial light-harvesting systems based on aggregation-induced emission constructed in supramolecular gels

Soft Matter ◽  
2021 ◽  
Author(s):  
Xinxian Ma ◽  
bo qiao ◽  
Jinlong Yue ◽  
JingJing Yu ◽  
yutao geng ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rhodamine B ◽  
Fluorescent Dyes ◽  
Light Harvesting ◽  
Artificial Light ◽  
Efficient Energy Transfer ◽  
Aggregation Induced Emission ◽  
Efficient Energy ◽  
Harvesting Systems ◽  
Acyl Hydrazone

Based on a new designed acyl hydrazone gelator (G2), we developed an efficient energy transfer supramolecular organogel in glycol with two different hydrophobic fluorescent dyes rhodamine B (RhB) and acridine...

Artificial light-harvesting systems based on macrocycles-assisted supramolecular assembly in aqueous media

2021 ◽  
Author(s):  
Kaiya Wang ◽  
Krishnasamy Velmurugan ◽  
Bin Li ◽  
Xiao-Yu Hu
Keyword(s):  
Light Harvesting ◽  
Aqueous Media ◽  
Supramolecular Assembly ◽  
Routine Activities ◽  
Chemical Energy ◽  
Artificial Light ◽  
Natural Systems ◽  
Harvesting Systems

Light-harvesting, which converts sunlight into chemical energy by natural systems such as plants, bacteria, is one of the most universal routine activities in nature. So far, various artificial light-harvesting systems...

Confining perovskite quantum dots in pores of covalent organic framework: quantum confinement- and passivation-enhanced light-harvesting and photocatalysis

2021 ◽  
Author(s):  
Genping Meng ◽  
Liping Zhen ◽  
Shihao Sun ◽  
Jun Hai ◽  
Zefan Zhang ◽  
...  
Keyword(s):  
Quantum Confinement ◽  
Light Harvesting ◽  
High Light ◽  
Artificial Light ◽  
Absorption Coefficients ◽  
Harvesting Systems ◽  
Perovskite Quantum Dots ◽  
Halide Perovskites ◽  
Lead Halide ◽  
Significant Attention

All-inorganic lead halide perovskites have attracted significant attention in artificial light-harvesting systems (ALHSs) due to their superior emission tunability and high light-absorption coefficients. However, their relatively low photoluminescence quantum yield...

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