Two-dimensional structural ordering in a chromophoric ionic liquid for triplet energy migration-based photon upconversion

2018 ◽  
Vol 20 (5) ◽  
pp. 3233-3240 ◽  
Author(s):  
Shota Hisamitsu ◽  
Nobuhiro Yanai ◽  
Hironori Kouno ◽  
Eisuke Magome ◽  
Masaya Matsuki ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Migration ◽  
Triplet Exciton ◽  
Two Dimensional ◽  
Triplet Energy ◽  
Structural Ordering ◽  
Exciton Diffusion

Triplet exciton diffusion in a chromophoric ionic liquid with two-dimensional order is studied and utilized for photon upconversion.

Two-Dimensional Triplet Energy Migration and Transfer in Polymer Langmuir−Blodgett Films

Langmuir ◽  
1996 ◽  
Vol 12 (15) ◽  
pp. 3682-3687 ◽  
Author(s):  
Kenji Hisada ◽  
Shinzaburo Ito ◽  
Masahide Yamamoto
Keyword(s):  
Energy Migration ◽  
Two Dimensional ◽  
Triplet Energy ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films

Device-Based Probe of Triplet Exciton Diffusion in Singlet Fission Materials

2021 ◽  
Vol 12 (3) ◽  
pp. 966-972
Author(s):  
Tao Zhang ◽  
Deepesh Rai ◽  
Russell J. Holmes
Keyword(s):  
Triplet Exciton ◽  
Singlet Fission ◽  
Exciton Diffusion

Ionic Liquid-Assisted Exfoliation of Two-Dimensional Metal–Organic Frameworks for Luminescent Sensing

2020 ◽  
Vol 8 (5) ◽  
pp. 2167-2175 ◽  
Author(s):  
Dongyin Liu ◽  
Bing Liu ◽  
Chan Wang ◽  
Wei Jin ◽  
Qijun Zha ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Metal Organic Frameworks ◽  
Two Dimensional ◽  
Metal Organic ◽  
Luminescent Sensing

scholarly journals Ultrafast Exciton Dynamics in Two Dimensional Covalent Organic Frameworks Reveals Size Dependence to Exciton Diffusion

2020 ◽  
Author(s):  
Nathan C. Flanders ◽  
Matthew S. Kirschner ◽  
Pyosang Kim ◽  
Thomas Fauvell ◽  
Austin Evans ◽  
...  
Keyword(s):  
High Performance ◽  
Transient Absorption ◽  
Domain Size ◽  
Spectroscopic Techniques ◽  
Two Dimensional ◽  
Exciton Dynamics ◽  
Singlet Exciton ◽  
Exciton Diffusion ◽  
Absorption Studies ◽  
Exciton Annihilation

<p>Large singlet exciton diffusion lengths are a hallmark of high performance in organic based devices such as photovoltaics, chemical sensors, and photodetectors. In this study, exciton dynamics of a two-dimensional covalent organic framework, COF- 5, is investigated using ultrafast spectroscopic techniques. Following photoexcitation, the COF-5 exciton decays via three pathways: 1) excimer formation (4 ± 2 ps), 2) excimer relaxation (160 ± 40 ps), and 3) excimer decay (>3 ns). Excitation fluence-dependent transient absorption studies suggest that COF-5 has a relatively large diffusion coefficient (0.08 cm2/s). Furthermore, exciton-exciton annihilation processes are characterized as a function of COF-5 crystallite domain size in four different samples, which reveal domain- size dependent exciton diffusion kinetics. These results reveal that exciton diffusion in COF-5 is constrained by its crystalline domain size. These insights indicate the outstanding promise of delocalized excitonic processes available in 2D COFs, which motivate their continued design and implementation into optoelectronic devices. </p>

Triplet Energy Migration in Poly(4-methacryloylbenzophenone-co-methyl methacrylate) Films:  Temperature Dependence and Chromophore Concentration Dependence

1996 ◽  
Vol 29 (5) ◽  
pp. 1589-1594 ◽  
Author(s):  
Akira Tsuchida ◽  
Masahide Yamamoto ◽  
William R. Liebe ◽  
Richard D. Burkhart ◽  
Kyoji Tsubakiyama
Keyword(s):  
Methyl Methacrylate ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Energy Migration ◽  
Triplet Energy ◽  
Chromophore Concentration
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