Mechanism of Singlet Fission in Thin Films of 1,3-Diphenylisobenzofuran

2014 ◽  
Vol 136 (20) ◽  
pp. 7363-7373 ◽  
Author(s):  
Joel N. Schrauben ◽  
Joseph L. Ryerson ◽  
Josef Michl ◽  
Justin C. Johnson
Keyword(s):  
Thin Films ◽  
Singlet Fission

Efficient Singlet Fission in Loose Packing Benzodipyrrolidone Thin Films

2021 ◽  
Author(s):  
Long Wang ◽  
Changfu Feng ◽  
Chuang Wu ◽  
Shaohua Xie ◽  
Yishi Wu ◽  
...  
Keyword(s):  
Thin Films ◽  
Singlet Fission ◽  
Loose Packing

scholarly journals Unveiling the concentration dependent direct triplet formation via singlet fission in a tetracene derivative

2019 ◽  
Vol 205 ◽  
pp. 09031
Author(s):  
Nikolaus Wollscheid ◽  
Nicolo Alagna ◽  
J. Luis Perez Lustres ◽  
Tiago Buckup ◽  
Sebastian Hahn ◽  
...  
Keyword(s):  
Thin Films ◽  
Underlying Mechanism ◽  
Intersystem Crossing ◽  
Singlet Fission ◽  
Concentrated Solutions ◽  
Triplet Formation

Singlet fission is slowed down on diffusional timescales in highly concentrated solutions compared to thin films for a tetracene-like molecule. The underlying mechanism suggests competing intersystem crossing and singlet fission, where in the latter singlets are converted directly to triplets without an intermediate excimer state.

scholarly journals Direct Observation of a Charge-Transfer State Preceding High-Yield Singlet Fission in Terrylenediimide Thin Films

2016 ◽  
Vol 139 (2) ◽  
pp. 663-671 ◽  
Author(s):  
Eric A. Margulies ◽  
Jenna L. Logsdon ◽  
Claire E. Miller ◽  
Lin Ma ◽  
Ethan Simonoff ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Transfer ◽  
Direct Observation ◽  
Charge Transfer State ◽  
High Yield ◽  
Singlet Fission ◽  
A Charge ◽  
Transfer State

scholarly journals Polymorphism influences singlet fission rates in tetracene thin films

2016 ◽  
Vol 7 (2) ◽  
pp. 1185-1191 ◽  
Author(s):  
Dylan H. Arias ◽  
Joseph L. Ryerson ◽  
Jasper D. Cook ◽  
Niels H. Damrauer ◽  
Justin C. Johnson
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Grain Size ◽  
Organic Semiconductor ◽  
Semiconductor Materials ◽  
Singlet Fission ◽  
Organic Semiconductor Materials

We report the effect of crystal structure and crystallite grain size on singlet fission (SF) in polycrystalline tetracene, one of the most widely studied SF and organic semiconductor materials.

Singlet Fission in Quaterrylenediimide Thin Films

2020 ◽  
Vol 124 (5) ◽  
pp. 2791-2798 ◽  
Author(s):  
Michelle Chen ◽  
Natalia E. Powers-Riggs ◽  
Adam F. Coleman ◽  
Ryan M. Young ◽  
Michael R. Wasielewski
Keyword(s):  
Thin Films ◽  
Singlet Fission

Interplay between Intermolecular and Intramolecular Singlet Fission in Thin Films of a Covalently Linked Terrylenediimide Dimer

2021 ◽  
Vol 125 (13) ◽  
pp. 6999-7009
Author(s):  
Michelle Chen ◽  
Adam F. Coleman ◽  
Ryan M. Young ◽  
Michael R. Wasielewski
Keyword(s):  
Thin Films ◽  
Singlet Fission ◽  
Covalently Linked

scholarly journals Vacancy control in acene blends links exothermic singlet fission to coherence

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Clemens Zeiser ◽  
Chad Cruz ◽  
David R. Reichman ◽  
Michael Seitz ◽  
Jan Hagenlocher ◽  
...  
Keyword(s):  
Thin Films ◽  
Vacancy Concentration ◽  
Tuning Parameter ◽  
Singlet Fission ◽  
Time Resolved ◽  
Fission Process ◽  
Spectroscopic Measurements ◽  
Triplet Pair ◽  
Pair Energy ◽  
Microscopic Modelling

AbstractThe fission of singlet excitons into triplet pairs in organic materials holds great technological promise, but the rational application of this phenomenon is hampered by a lack of understanding of its complex photophysics. Here, we use the controlled introduction of vacancies by means of spacer molecules in tetracene and pentacene thin films as a tuning parameter complementing experimental observables to identify the operating principles of different singlet fission pathways. Time-resolved spectroscopic measurements in combination with microscopic modelling enables us to demonstrate distinct scenarios, resulting from different singlet-to-triplet pair energy alignments. For pentacene, where fission is exothermic, coherent mixing between the photoexcited singlet and triplet-pair states is promoted by vibronic resonances, which drives the fission process with little sensitivity to the vacancy concentration. Such vibronic resonances do not occur for endothermic materials such as tetracene, for which we find fission to be fully incoherent; a process that is shown to slow down with increasing vacancy concentration.

scholarly journals Relation between molecular packing and singlet fission in thin films of brominated perylenediimides

2019 ◽  
Vol 151 (9) ◽  
pp. 094301 ◽  
Author(s):  
Kevin M. Felter ◽  
Rajeev K. Dubey ◽  
Ferdinand C. Grozema
Keyword(s):  
Thin Films ◽  
Molecular Packing ◽  
Singlet Fission
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