Spectroscopic Demonstration of Exciton Dynamics and Excimer Formation in a Sterically Controlled Perylene Bisimide Dimer Aggregate

2014 ◽  
Vol 5 (20) ◽  
pp. 3601-3607 ◽  
Author(s):  
Minjung Son ◽  
Kyu Hyung Park ◽  
Changzhun Shao ◽  
Frank Würthner ◽  
Dongho Kim
Keyword(s):  
Exciton Dynamics ◽  
Perylene Bisimide ◽  
Excimer Formation

Ultrafast Exciton Delocalization, Localization, and Excimer Formation Dynamics in a Highly Defined Perylene Bisimide Quadruple π-Stack

2018 ◽  
Vol 140 (12) ◽  
pp. 4253-4258 ◽  
Author(s):  
Christina Kaufmann ◽  
Woojae Kim ◽  
Agnieszka Nowak-Król ◽  
Yongseok Hong ◽  
Dongho Kim ◽  
...  
Keyword(s):  
Perylene Bisimide ◽  
Formation Dynamics ◽  
Excimer Formation

scholarly journals Ultrafast coherent exciton dynamics in size-controlled perylene bisimide aggregates

2019 ◽  
Vol 6 (6) ◽  
pp. 064501 ◽  
Author(s):  
Seongsoo Kang ◽  
Christina Kaufmann ◽  
Yongseok Hong ◽  
Woojae Kim ◽  
Agnieszka Nowak-Król ◽  
...  
Keyword(s):  
Exciton Dynamics ◽  
Perylene Bisimide ◽  
Size Controlled

scholarly journals Switch of dimensionality of exciton diffusion in aggregates

2019 ◽  
Vol 205 ◽  
pp. 06015
Author(s):  
Steffen Wolter ◽  
Frank Würthner ◽  
Oliver Kühn ◽  
Stefan Lochbrunner
Keyword(s):  
Low Temperatures ◽  
Exciton Dynamics ◽  
Perylene Bisimide ◽  
Exciton Diffusion ◽  
J Aggregates

The ultrafast exciton dynamics in J-aggregates of a perylene bisimide dye is investigated for temperatures down to 77 K revealing at low temperatures a decrease of the exciton mobility and a change in the dimensionality.

Study of the exciton dynamics in perylene bisimide (PBI) aggregates with symmetrical quasiclassical dynamics based on the Meyer–Miller mapping Hamiltonian

2020 ◽  
Vol 22 (32) ◽  
pp. 18192-18204
Author(s):  
Jie Zheng ◽  
Jiawei Peng ◽  
Yu Xie ◽  
Yunze Long ◽  
Xin Ning ◽  
...  
Keyword(s):  
Exciton Dynamics ◽  
One Dimensional ◽  
Perylene Bisimide

The exciton dynamics in one-dimensional stacked PBI (Perylene Bisimide) aggregates was studied with SQC-MM dynamics (Symmetrical Quasiclassical Dynamics based on the Meyer–Miller mapping Hamiltonian).

Photoinduced electron transfer (PET) versus excimer formation in supramolecular p/n-heterojunctions of perylene bisimide dyes and implications for organic photovoltaics

2015 ◽  
Vol 185 ◽  
pp. 507-527 ◽  
Author(s):  
Agnieszka Nowak-Król ◽  
Benjamin Fimmel ◽  
Minjung Son ◽  
Dongho Kim ◽  
Frank Würthner
Keyword(s):  
Electron Transfer ◽  
Organic Solar Cells ◽  
Photoinduced Electron Transfer ◽  
Transient Absorption ◽  
Model Systems ◽  
Transient Absorption Spectroscopy ◽  
Time Resolved ◽  
Perylene Bisimide ◽  
Excimer Formation ◽  
Molecular Semiconductor

Foldamer systems comprised of two perylene bisimide (PBI) dyes attached to the conjugated backbones of 1,2-bis(phenylethynyl)benzene and phenylethynyl-bis(phenylene)indane, respectively, were synthesized and investigated with regard to their solvent-dependent properties. UV/Vis absorption and steady-state fluorescence spectra show that both foldamers exist predominantly in a folded H-aggregated state consisting of π–π-stacked PBIs in THF and in more random conformations with weaker excitonic coupling between the PBIs in chloroform. Time-resolved fluorescence spectroscopy and transient absorption spectroscopy reveal entirely different relaxation pathways for the photoexcited molecules in the given solvents, i.e. photoinduced electron transfer leading to charge separated states for the open conformations (in chloroform) and relaxation into excimer states with red-shifted emission for the stacked conformations (in THF). Supported by redox data from cyclic voltammetry and Rehm–Weller analysis we could relate the processes occurring in these solution-phase model systems to the elementary processes in organic solar cells. Accordingly, only if relaxation pathways such as excimer formation are strictly avoided in molecular semiconductor materials, excitons may diffuse over larger distances to the heterojunction interface and produce photocurrent via the formation of electron/hole pairs by photoinduced electron transfer.

Low temperature exciton dynamics and structural changes in perylene bisimide aggregates

2017 ◽  
Vol 50 (18) ◽  
pp. 184005 ◽  
Author(s):  
Steffen Wolter ◽  
Karl Magnus Westphal ◽  
Magdalena Hempel ◽  
Frank Würthner ◽  
Oliver Kühn ◽  
...  
Keyword(s):  
Low Temperature ◽  
Structural Changes ◽  
Exciton Dynamics ◽  
Perylene Bisimide

scholarly journals Size-dependent exciton dynamics in one-dimensional perylene bisimide aggregates

2012 ◽  
Vol 14 (10) ◽  
pp. 105027 ◽  
Author(s):  
Steffen Wolter ◽  
Janis Aizezers ◽  
Franziska Fennel ◽  
Marcus Seidel ◽  
Frank Würthner ◽  
...  
Keyword(s):  
Exciton Dynamics ◽  
One Dimensional ◽  
Perylene Bisimide ◽  
Size Dependent
Sign in / Sign up

Export Citation Format

Share Document