scholarly journals Single-photon emitter using excitation energy transfer between quantum dots

2008 ◽  
Vol 2 (1) ◽  
pp. 029502 ◽  
Author(s):  
Tadashi Kawazoe
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Single Photon ◽  
Excitation Energy Transfer

Ab Initio Study of Excitation Energy Transfer between Quantum Dots and Dye Molecules

2009 ◽  
Vol 113 (18) ◽  
pp. 7548-7552 ◽  
Author(s):  
Hiroyuki Tamura ◽  
Jean-Maurice Mallet ◽  
Martin Oheim ◽  
Irene Burghardt
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Ab Initio ◽  
Excitation Energy Transfer ◽  
Dye Molecules ◽  
Ab Initio Study

scholarly journals Non-linear Simultaneous Two-Photon Excitation Energy Transfer in the Wrong Direction

1997 ◽  
Vol 17 (3) ◽  
pp. 161-174 ◽  
Author(s):  
M. Nickoleit ◽  
A. Uhl ◽  
J. Bendig
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Single Photon ◽  
Energy Levels ◽  
Excitation Energy Transfer ◽  
Laser Exposure ◽  
Two Photon ◽  
Photon Excitation ◽  
Covalently Linked ◽  
Two Photon Excitation

The simultaneous two-photon excitation energy transfer (SEET) was demonstrated for the first time using trichromophoric model compounds. Two identical donors (A–antenna) were covalently linked to an energy acceptor unit (T–target) with different energy levels preventing energy transfer of a single photon. At high intensity illumination (laser exposure) of a trichromophoric system A∼T∼A (A–fluorescein, erythrosin; T-Estilbene), sufficient to excite both of the appended donor subunits, population of the target excited state may occur via simultaneous energy transfer of two photons, one from each donor. In order to restrict reverse energy transfer from the higher energy target to the lower energy donor(s) it is necessary that the excited target unit undergoes an efficient photoreaction. In the investigated case this was achieved by photoisomerization of the stilbene unit used for monitoring of the SEET.

Nanotubular J-Aggregates and Quantum Dots Coupled for Efficient Resonance Excitation Energy Transfer

ACS Nano ◽  
2015 ◽  
Vol 9 (2) ◽  
pp. 1552-1560 ◽  
Author(s):  
Yan Qiao ◽  
Frank Polzer ◽  
Holm Kirmse ◽  
Egon Steeg ◽  
Sergei Kühn ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Resonance Excitation ◽  
J Aggregates

Ultrafast Excitation Energy Transfer in Vinylpyridine Terminated Silicon Quantum Dots

2011 ◽  
Vol 115 (46) ◽  
pp. 22781-22788 ◽  
Author(s):  
Anja Sommer ◽  
Carla Cimpean ◽  
Michael Kunz ◽  
Christian Oelsner ◽  
Hans J. Kupka ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Silicon Quantum Dots

scholarly journals Beads on a Chain (BoC) Fluorescent Oligomeric Materials: Interactions of Conjugated Organic Cross-Linkers with Silsesquioxane Cages

2021 ◽  
Author(s):  
Shahrea Mahbub ◽  
Sukanya Saha ◽  
Ramakrishna Guda ◽  
Joseph Furgal
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Transient Absorption ◽  
Electronic Materials ◽  
Field Effect Transistors ◽  
Single Photon ◽  
Photophysical Properties ◽  
Excitation Energy Transfer ◽  
Transient Absorption Spectroscopy ◽  
Gravimetric Analysis

<div> <div> <div> <p>Organic electronic materials have advantages over inorganics in terms of versatility, cost and processability. Recent advancements in organic materials for light emitting diodes (OLED), field effect transistors (OFET), and photovoltaics have engendered extensive innovation potential on this field. In this research, we focus on synthesizing SQ (silsesquioxane) based oligomers cross- linked by di-bromo-aromatic linkers and explore how the cross-linker and oligomer length influence their photophysical properties. Bis-tri-alkoxy silyl (linker) model compounds were synthesized to compare non-cage photophysical properties with the oligomers. Several techniques such as UV/Vis, fluorescence, FTIR, thermal gravimetric analysis (TGA) have been used to characterize the systems. Time-resolved fluorescence and femtosecond transient absorption spectroscopy are used to understand the excited state dynamics of these materials. Studies are carried out to understand the differences between monomers and oligomers and potential energy transfer and charge transfer between the cages and cross-linking chromophores. Transient absorption showed lower energy absorption from the excited states, suggesting short range communication between moieties. Single photon counting studies have shown distinct lifetime differences between most linkers and cages showing possible excitation energy transfer through these materials. Transient absorption anisotropy measurements have shown signatures for excitation energy transfer between linker chromophores for oligomeric compounds. The silsesquioxane (SQ) backbone of the oligomers gives substantial thermal stability as well as solution processability, giving better flexibility for achieving energy transfer between linking chromophores. </p> </div> </div> </div>

Excitation Energy Transfer from Quantum Dots to Porphyrin J-aggregates in Hybrid Langmuir–Blodgett Multilayers

2012 ◽  
Vol 41 (1) ◽  
pp. 122-124 ◽  
Author(s):  
Haibin Wang ◽  
Jotaro Nakazaki ◽  
Takaya Kubo ◽  
Hiroshi Segawa
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Langmuir Blodgett ◽  
J Aggregates

scholarly journals Beads on a Chain (BoC) Fluorescent Oligomeric Materials: Interactions of Conjugated Organic Cross-Linkers with Silsesquioxane Cages

2021 ◽  
Author(s):  
Shahrea Mahbub ◽  
Sukanya Saha ◽  
Ramakrishna Guda ◽  
Joseph Furgal
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Transient Absorption ◽  
Electronic Materials ◽  
Field Effect Transistors ◽  
Single Photon ◽  
Photophysical Properties ◽  
Excitation Energy Transfer ◽  
Transient Absorption Spectroscopy ◽  
Gravimetric Analysis

<div> <div> <div> <p>Organic electronic materials have advantages over inorganics in terms of versatility, cost and processability. Recent advancements in organic materials for light emitting diodes (OLED), field effect transistors (OFET), and photovoltaics have engendered extensive innovation potential on this field. In this research, we focus on synthesizing SQ (silsesquioxane) based oligomers cross- linked by di-bromo-aromatic linkers and explore how the cross-linker and oligomer length influence their photophysical properties. Bis-tri-alkoxy silyl (linker) model compounds were synthesized to compare non-cage photophysical properties with the oligomers. Several techniques such as UV/Vis, fluorescence, FTIR, thermal gravimetric analysis (TGA) have been used to characterize the systems. Time-resolved fluorescence and femtosecond transient absorption spectroscopy are used to understand the excited state dynamics of these materials. Studies are carried out to understand the differences between monomers and oligomers and potential energy transfer and charge transfer between the cages and cross-linking chromophores. Transient absorption showed lower energy absorption from the excited states, suggesting short range communication between moieties. Single photon counting studies have shown distinct lifetime differences between most linkers and cages showing possible excitation energy transfer through these materials. Transient absorption anisotropy measurements have shown signatures for excitation energy transfer between linker chromophores for oligomeric compounds. The silsesquioxane (SQ) backbone of the oligomers gives substantial thermal stability as well as solution processability, giving better flexibility for achieving energy transfer between linking chromophores. </p> </div> </div> </div>

Sign in / Sign up

Export Citation Format

Share Document