Consistent red luminescence in π-conjugated polymers with tuneable elastic moduli over five orders of magnitude

2020 ◽  
Vol 7 (5) ◽  
pp. 1421-1426 ◽  
Author(s):  
Zhenfeng Guo ◽  
Akira Shinohara ◽  
Chengjun Pan ◽  
Florian J. Stadler ◽  
Zhonghua Liu ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Conjugated Polymers ◽  
Elastic Moduli ◽  
Luminescent Properties ◽  
Side Chains ◽  
Wide Range ◽  
Alkyl Side Chains ◽  
Red Luminescence

Bulky but flexible alkyl side chains enable π-conjugated polymers to possess wide-range elastic modulus tuneability, yet consistent red luminescent properties.

High-performance near-infrared organic phototransistors based on diketopyrrolopyrrole conjugated polymers with partial removal of long branched alkyl side chains

2020 ◽  
Vol 8 (47) ◽  
pp. 16915-16922
Author(s):  
Yu Tang ◽  
Weijie Ge ◽  
Ping Deng ◽  
Qiaoming Zhang ◽  
Yingjie Liao ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Charge Transport ◽  
High Performance ◽  
Near Infrared ◽  
Side Chains ◽  
Partial Removal ◽  
Nir Absorption ◽  
Alkyl Side Chains

Near-infrared (NIR) phototransistors based on diketopyrrolopyrrole polymers with partial removal of side chains are reported with improved NIR photoresponses, which take advantage of both strengthened NIR absorption and improved charge transport.

scholarly journals Controlled steric selectivity in molecular doping towards closest-packed supramolecular conductors

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Shinya Kohno ◽  
Yu Yamashita ◽  
Naotaka Kasuya ◽  
Tsubasa Mikie ◽  
Itaru Osaka ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Steric Effects ◽  
Side Chain ◽  
Side Chains ◽  
Void Space ◽  
Alkyl Side Chains ◽  
Recent Developments ◽  
High Carrier ◽  
Molecular Doping ◽  
Steric Selectivity

Abstract Recent developments in molecular doping technologies allow extremely high carrier densities in polymeric semiconductors, exhibiting great diversity because of the unique size, conformation, and steric effect of molecular dopants. However, it is controversial how steric effects can limit the doping efficiency and to what extent dopants can be accommodated in polymers. Here, we employ two distinct conjugated polymers with different alkyl side-chain densities, where polymers are doped via anion-change, allowing greater variation in the incorporation of molecular dopants having different electrostatic potentials and shapes. We characterize the doping efficiency with regard to steric effects, considering the unique void space in the conjugated polymers. Our study reveals that doping efficiency of polymers with sparse alkyl side-chains is significantly greater than that with dense side-chains. A closest-packed supramolecule is realized with a particular combination of a sparse polymer and a large dopant, giving rise to high conductivity, air stability, and remarkably high work function. This work provides a critical insight into overcoming steric effects in molecular doping.

Low band gap conjugated polymers combining siloxane-terminated side chains and alkyl side chains: side-chain engineering achieving a large active layer processing window for PCE > 10% in polymer solar cells

2017 ◽  
Vol 5 (33) ◽  
pp. 17619-17631 ◽  
Author(s):  
Xuncheng Liu ◽  
Li Nian ◽  
Ke Gao ◽  
Lianjie Zhang ◽  
Lechi Qing ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Active Layer ◽  
Polymer Solar Cells ◽  
Hole Transport ◽  
Random Copolymers ◽  
Side Chain ◽  
Active Layer Thickness ◽  
Side Chains ◽  
Alkyl Side Chains ◽  
Thickness Tolerance

Side-chain random copolymers show high 3-D hole transport and offer excellent active layer thickness tolerance.

scholarly journals Synthesis of diketopyrrolopyrrole-based polymers with polydimethylsiloxane side chains and their application in organic field-effect transistors

2018 ◽  
Vol 5 (3) ◽  
pp. 172025 ◽  
Author(s):  
Inori Ohnishi ◽  
Kazuhito Hashimoto ◽  
Keisuke Tajima
Keyword(s):  
Thin Films ◽  
Conjugated Polymers ◽  
Charge Transport ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Side Chains ◽  
Organic Field Effect Transistors ◽  
High Solubility ◽  
Solid Films ◽  
Alkyl Side Chains

Linear polydimethylsiloxane (PDMS) was investigated as a solubilizing group for π-conjugated polymers with the aim of combining high solubility in organic solvents with the molecular packing in solid films that is advantageous for charge transport. Diketopyrrolopyrrole-based copolymers with different contents and substitution patterns of the PDMS side chains were synthesized and evaluated for application in organic field-effect transistors. The PDMS side chains greatly increased the solubility of the polymers and led to shorter d -spacings of the π-stacking in the thin films compared with polymers containing conventional branched alkyl side chains.

Effect of Semi-Fluorinated Alkyl Side Chains on Conjugated Polymers with Planar Backbone in Organic Field-Effect Transistors

2018 ◽  
Vol 39 (23) ◽  
pp. 1800431 ◽  
Author(s):  
Min-Hye Lee ◽  
Minji Kang ◽  
Hyung-Gu Jeong ◽  
Jong-Jin Park ◽  
Kyoungtae Hwang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Side Chains ◽  
Organic Field Effect Transistors ◽  
Alkyl Side Chains

scholarly journals Effect of the length of alkyl side chains in the electronic structure of conjugated polymers

2014 ◽  
Vol 17 (6) ◽  
pp. 1369-1374 ◽  
Author(s):  
Eliezer Fernando Oliveira ◽  
Francisco Carlos Lavarda
Keyword(s):  
Electronic Structure ◽  
Conjugated Polymers ◽  
Side Chains ◽  
Alkyl Side Chains

SYNTHESIS AND ELECTROLUMINESCENT PROPERTIES OF POLYAZOMETHINE-TYPE CONJUGATED POLYMERS CONTAINING HETEROCYCLIC PHENOTHIAZINE AND CARBAZOLE MOIETY

2005 ◽  
Vol 14 (04) ◽  
pp. 545-553 ◽  
Author(s):  
JEON WOO JEONG ◽  
YOUNGHWAN KWON ◽  
JEONG JU BAEK ◽  
LEE SOON PARK ◽  
EUI-WAN LEE ◽  
...  
Keyword(s):  
Schiff Base ◽  
Conjugated Polymers ◽  
Organic Solvents ◽  
Double Layer ◽  
Polymer Structure ◽  
The Other ◽  
Side Chains ◽  
Emission Color ◽  
Alkyl Side Chains

Polyazomethine-type conjugated polymers were synthesized by Schiff-base reaction. One was poly(PZ-PBI) with alternating phenothiazine (PZ) and azomethine units (-C = N-) , and the other was poly(CZ-PBI) comprising alternating carbazole (CZ) and azomethine groups. Conjugated polymers exhibited improved solubility in common organic solvents due to alkyl side chains on phenothiazine and carbazole rings as well as polar azomethine groups in main chains. Single- and double-layer PLEDs were fabricated. Their electroluminescent properties were studied from the viewpoint of polymer structure vs. emission color and efficiency.

Electronic properties of isoindigo-based conjugated polymers bearing urea-containing and linear alkyl side chains

2018 ◽  
Vol 6 (44) ◽  
pp. 12070-12078 ◽  
Author(s):  
Brynn P. Charron ◽  
Michael U. Ocheje ◽  
Mariia Selivanova ◽  
Arthur D. Hendsbee ◽  
Yuning Li ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Electronic Properties ◽  
Side Chain ◽  
Side Chains ◽  
Engineering Study ◽  
Alkyl Side Chains

A side-chain engineering study has been performed with isoindigo-based conjugated polymers to modulate their physical and electronic properties through the incorporation of urea-containing and saturated linear side chains.

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