Anisotropy of singlet exciton diffusion in organic semiconductor crystals from ab initio approaches

2014 ◽  
Vol 140 (2) ◽  
pp. 024503 ◽  
Author(s):  
V. Stehr ◽  
B. Engels ◽  
C. Deibel ◽  
R. F. Fink
Keyword(s):  
Ab Initio ◽  
Organic Semiconductor ◽  
Singlet Exciton ◽  
Exciton Diffusion ◽  
Semiconductor Crystals

scholarly journals Orientation Control of Selected Organic Semiconductor Crystals Achieved by Monolayer Graphene Templates

2016 ◽  
Vol 3 (22) ◽  
pp. 1600621 ◽  
Author(s):  
Lushuai Zhang ◽  
Susmit Singha Roy ◽  
Nathaniel S. Safron ◽  
Melinda J. Shearer ◽  
Robert M. Jacobberger ◽  
...  
Keyword(s):  
Organic Semiconductor ◽  
Monolayer Graphene ◽  
Orientation Control ◽  
Semiconductor Crystals

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>

Singlet Exciton Diffusion in Organic Crystals Based on Marcus Transfer Rates

2014 ◽  
Vol 10 (3) ◽  
pp. 1242-1255 ◽  
Author(s):  
Vera Stehr ◽  
Reinhold F. Fink ◽  
Bernd Engels ◽  
Jens Pflaum ◽  
Carsten Deibel
Keyword(s):  
Organic Crystals ◽  
Transfer Rates ◽  
Singlet Exciton ◽  
Exciton Diffusion

Nanoconfining solution-processed organic semiconductors for emerging optoelectronics

2021 ◽  
Author(s):  
Yuze Zhang ◽  
Alina Chen ◽  
Min-Woo Kim ◽  
Aida Alaei ◽  
Stephanie S. Lee
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Light Emission ◽  
Solution Processed ◽  
Semiconductor Crystals

This tutorial review highlights the role of nanoconfinement in selecting for orientations and polymorphs of organic semiconductor crystals that are optimized for optoelectronic processes, including charge transport and light emission.

Molecular design and crystallization process control for thin sheet-shaped organic semiconductor crystals with two-dimensional packing

2021 ◽  
Author(s):  
Yuejuan Wan ◽  
Zejian Zhang ◽  
Haichao Liu ◽  
Jiadong Zhou ◽  
Liqun Liu ◽  
...  
Keyword(s):  
Organic Semiconductor ◽  
Essential Role ◽  
Crystallization Process ◽  
Molecular Design ◽  
Thin Sheet ◽  
Optoelectronic Devices ◽  
Two Dimensional ◽  
High Property ◽  
Practical Applications ◽  
Semiconductor Crystals

The sheet-liked organic semiconductor crystals with two-dimensional (2D) packed structures play an essential role in practical applications of high-property optoelectronic devices. Here, we reported a practical example in combination with...

scholarly journals Molecular doped organic semiconductor crystals for optoelectronic device applications

2020 ◽  
Vol 8 (43) ◽  
pp. 14996-15008
Author(s):  
Zhengsheng Qin ◽  
Can Gao ◽  
Wallace W. H. Wong ◽  
Moritz K. Riede ◽  
Tianyu Wang ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Single Crystals ◽  
Organic Semiconductor ◽  
Material Selection ◽  
Optoelectronic Device ◽  
Semiconductor Crystals ◽  
Device Applications

In this review, we give a timely summary of the current progress of molecular doped organic semiconductor single crystals in terms of material selection, crystal growth, resulting properties and device applications.

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