scholarly journals Controlling molecular ordering in solution-state conjugated polymers

Nanoscale ◽  
2015 ◽  
Vol 7 (37) ◽  
pp. 15134-15141 ◽  
Author(s):  
J. Zhu ◽  
Y. Han ◽  
R. Kumar ◽  
Y. He ◽  
K. Hong ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Solution State ◽  
Molecular Ordering

scholarly journals Correction: Controlling molecular ordering in solution-state conjugated polymers

Nanoscale ◽  
2015 ◽  
Vol 7 (37) ◽  
pp. 15507-15507
Author(s):  
J. Zhu ◽  
Y. Han ◽  
R. Kumar ◽  
Y. He ◽  
K. Hong ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Solution State ◽  
Molecular Ordering

Conductive Polymers Based on Phenothiazine-Benzothiadiazole: Synthesis, Characterization of Photovoltaics

2013 ◽  
Vol 634-638 ◽  
pp. 2643-2650 ◽  
Author(s):  
Dae Hee Yun ◽  
Han Sol Yoo ◽  
Tae Won Ko ◽  
Yong Sung Park ◽  
Je Wan Woo
Keyword(s):  
Conjugated Polymers ◽  
Power Conversion ◽  
Coupling Reaction ◽  
Band Gap Energy ◽  
Suzuki Coupling Reaction ◽  
Gap Energy ◽  
Solution State ◽  
Conversion Efficiencies ◽  
Film State

Two new π-conjugated polymers (Poly[(N-10’-(octan-3-yl)-phenothiazin-3,7-ylene)-alt- (4’,7’-bis(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PoPTZ-BT-BTD), Poly[(N-10`-(octan-3-yl) -phenothiazin-3,7-ylene)-alt-(4’,7’-bis(thiophen-2-yl)-5,6-bis(octyloxy)benzo[c][1,2,5]thiadiazole)] (PoPTZ-BT-BoBTD) ) were synthesized through the Suzuki coupling reaction for organic photovoltaics (OPVs), and their optical and electrochemical properties were analyzed. Their wavelength of maximun absorption was 526 nm and 506 nm in solution state, repectively, and 560 nm and 522 nm in film state, respectively. Their band-gap energy was 2.01 eV and 2.09 eV in solution state, and 1.82 eV and 1.91 eV in film state, respectively. The results of analysis of the chrateristics of photovoltaics, 0.79 % and 0.99 % of the maximum power conversion efficiencies (PCE), repectively.

Ordered Solid‐State Microstructures of Conjugated Polymers Arising from Solution‐State Aggregation

2020 ◽  
Vol 132 (40) ◽  
pp. 17620-17624
Author(s):  
Ze‐Fan Yao ◽  
Zi‐Yuan Wang ◽  
Hao‐Tian Wu ◽  
Yang Lu ◽  
Qi‐Yi Li ◽  
...  
Keyword(s):  
Solid State ◽  
Conjugated Polymers ◽  
Solution State ◽  
State Aggregation

Ordered Solid‐State Microstructures of Conjugated Polymers Arising from Solution‐State Aggregation

2020 ◽  
Vol 59 (40) ◽  
pp. 17467-17471 ◽  
Author(s):  
Ze‐Fan Yao ◽  
Zi‐Yuan Wang ◽  
Hao‐Tian Wu ◽  
Yang Lu ◽  
Qi‐Yi Li ◽  
...  
Keyword(s):  
Solid State ◽  
Conjugated Polymers ◽  
Solution State ◽  
State Aggregation

Solution-State Long-Range Molecular Ordering in Poly(3-hexylthiophene)

Langmuir ◽  
2020 ◽  
Vol 36 (37) ◽  
pp. 11028-11033
Author(s):  
Mohammad Changez ◽  
Mohammad Faiyaz Anwar ◽  
Rayya Al Balushi ◽  
Jae-Suk Lee
Keyword(s):  
Long Range ◽  
Solution State ◽  
Molecular Ordering

scholarly journals Understanding Solution State Conformation and Aggregate Structure of Conjugated Polymers via Small Angle X-ray Scattering

2021 ◽  
Author(s):  
Justin J. Kwok ◽  
Kyung Sun Park ◽  
Bijal B. Patel ◽  
Rishat Dilmurat ◽  
David Beljonne ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Small Angle ◽  
Film Deposition ◽  
Primary System ◽  
State Structure ◽  
X Ray ◽  
Solution State ◽  
X Ray Scattering ◽  
Freeze Dried ◽  
Ray Scattering

Donor-acceptor (D-A) conjugated polymers are high-performance organic electronic materials that exhibit complex aggregation behavior. Understanding the solution state conformation and aggregation of conjugated polymers is crucial for controlling morphology during thin-film deposition and the subsequent electronic performance. However, a precise multiscale structure of solution state aggregates is lacking. Here, we present an in-depth small angle X-ray scattering (SAXS) analysis of the solution state structure of an isoindigo-bithiophene based D-A polymer (PII-2T) as our primary system. Modeling the system as a combination of hierarchical fibrillar aggregates mixed with dispersed polymers, we extract information about conformation and multiscale aggregation and also clarify the physical origin of features often observed but unaddressed or misinterpreted in small-angle scattering patterns of conjugated polymers. The persistence length of the D-A polymer extracted from SAXS agrees well with a theoretical model based on the dihedral potentials. Additionally, we show that the broad high q structure factor peak seen in scattering profiles can be attributed to lamellar stacking occurring within the fibril aggregates and that the low q aggregate scattering is strongly influenced by the polymer molecular weight. Overall, the SAXS profiles of D-A polymers in general exhibit a sensitive dependence on the co-existence of fibrillar aggregate and dispersed polymer chain populations. We corroborate our findings from SAXS with electron microscopy of freeze-dried samples for direct imaging of fibrillar aggregates. Finally, we demonstrate the generality of our approach by fitting the scattering profiles of a variety of D-A polymers. The results presented here establish a picture of the D-A polymer solution state structure and provide a general method of interpreting and analyzing their scattering profiles.

scholarly journals What Is the Assembly Pathway of a Conjugated Polymer From Solution to Thin Films?

2020 ◽  
Vol 8 ◽  
Author(s):  
Zhuang Xu ◽  
Kyung Sun Park ◽  
Ying Diao
Keyword(s):  
Conjugated Polymers ◽  
Critical Role ◽  
Domain Size ◽  
Hierarchical Assembly ◽  
Solution State ◽  
Assembly Pathway ◽  
Assembly Pathways ◽  
Hierarchical Morphology ◽  
Structural Characterizations ◽  
Polymer Assembly

The hierarchical assembly of conjugated polymers has gained much attention due to its critical role in determining optical/electrical/mechanical properties. The hierarchical morphology encompasses molecular-scale intramolecular conformation (torsion angle, chain folds) and intermolecular ordering (π–π stacking), mesoscale domain size, orientation and connectivity, and macroscale alignment and (para)crystallinity. Such complex morphology in the solid state is fully determined by the polymer assembly pathway in the solution state, which, in turn, is sensitively modulated by molecular structure and processing conditions. However, molecular pictures of polymer assembly pathways remain elusive due to the lack of detailed structural characterizations in the solution state and the lack of understanding on how various factors impact the assembly pathways. In this mini-review, we present possible assembly pathways of conjugated polymers and their characteristics across length scales. Recent advances in understanding and controlling of assembly pathways are highlighted. We also discuss the current gap in our knowledge of assembly pathways, with future perspectives on research needed on this topic.

scholarly journals Carrier Transport Enhancement in Conjugated Polymers through Interfacial Self-Assembly of Solution-State Aggregates

2016 ◽  
Vol 8 (30) ◽  
pp. 19649-19657 ◽  
Author(s):  
Kui Zhao ◽  
Hadayat Ullah Khan ◽  
Ruipeng Li ◽  
Hanlin Hu ◽  
Aram Amassian
Keyword(s):  
Conjugated Polymers ◽  
Self Assembly ◽  
Carrier Transport ◽  
Solution State ◽  
Transport Enhancement
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