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 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.

A strong influence of the positions of solubilizing alkyl side chains on optoelectronic and photovoltaic properties of TTBTBTT-based conjugated polymers

2015 ◽  
Vol 3 (7) ◽  
pp. 1497-1506 ◽  
Author(s):  
A. V. Akkuratov ◽  
D. K. Susarova ◽  
Y. L. Moskvin ◽  
D. V. Anokhin ◽  
A. V. Chernyak ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Charge Transport ◽  
Strong Influence ◽  
Relative Orientation ◽  
Side Chains ◽  
Photovoltaic Properties ◽  
Alkyl Side Chains

It has been shown that positions and relative orientation of the alkyl side chains in the carbazole–TTBTBTT co-polymers affect significantly their optoelectronic, charge transport and photovoltaic properties.

Theoretical study of charge-transport and optical properties of indeno[1,2-b]fluorene-6,12-dione-based semiconducting materials

2018 ◽  
Vol 74 (6) ◽  
pp. 705-711 ◽  
Author(s):  
Jin-Dou Huang ◽  
Jinfeng Zhao ◽  
Kun Yu ◽  
Xiaohua Huang ◽  
Shi-Bo Cheng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Charge Transport ◽  
Near Infrared ◽  
Reorganization Energy ◽  
Hole Mobility ◽  
Side Chains ◽  
Semiconducting Materials ◽  
Π Stacking ◽  
Electron Transfer Theory ◽  
Reorganization Energies

The conducting and optical properties of a series of indeno[1,2-b]fluorene-6,12-dione (IFD)-based molecules have been systematically studied and the influences of butyl, butylthio and dibutylamino substituents on the reorganization energies, intermolecular electronic couplings and charge-injection barriers of IFD have been discussed. The quantum-chemical calculations combined with electron-transfer theory reveal that the incorporation of sulfur-linked side chains decreases reorganization energy associated with hole transfer and optimizes intermolecular π–π stacking, which results in excellent ambipolar charge-transport properties (μh = 1.15 cm2 V−1 s−1 and μe = 0.08 cm2 V−1 s−1); in comparison, addition of dibutylamino side chains increases intermolecular steric interactions and hinders perfect intermolecular π–π stacking, which results in the weak electronic couplings and finally causes the low intrinsic hole mobility (μh = 0.01 cm2 V−1 s−1). Furthermore, electronic spectra of butyl-IFD, butylthio-IFD and dibutylamino-IFD were simulated and compared with the reported experimental data. Calculations demonstrate that IFD-based molecules possess potential for developing novel infrared and near-infrared probe materials via suitable chemical modifications.

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.

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.

Development of New Conjugated Polymers with Donor−π-Bridge−Acceptor Side Chains for High Performance Solar Cells

2009 ◽  
Vol 131 (39) ◽  
pp. 13886-13887 ◽  
Author(s):  
Fei Huang ◽  
Kung-Shih Chen ◽  
Hin-Lap Yip ◽  
Steven K. Hau ◽  
Orb Acton ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
High Performance ◽  
Side Chains ◽  
Acceptor Side

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.

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