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.

Synergy strategy to the flexible alkyl and chloride side-chain engineered quinoxaline-based D–A conjugated polymers for efficient non-fullerene polymer solar cells

2021 ◽  
Author(s):  
Liang Zeng ◽  
Ruijie Ma ◽  
Qiang Zhang ◽  
Tao Liu ◽  
Yiqun Xiao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Halogen Atom ◽  
Polymer Solar Cells ◽  
Fine Tuning ◽  
Side Chain ◽  
Side Chains

We are developing both copolymers with quinoxaline (Qx) as acceptor units by fine tuning the side chains with halogen atom chlorine (Cl) and flexible alkyl engineering for efficient non-fullerene polymer solar cells.

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.

A stability study of polymer solar cells using conjugated polymers with different donor or acceptor side chain patterns

2016 ◽  
Vol 4 (42) ◽  
pp. 16677-16689 ◽  
Author(s):  
Ilona M. Heckler ◽  
Jurgen Kesters ◽  
Maxime Defour ◽  
Huguette Penxten ◽  
Bruno Van Mele ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Polymer Solar Cells ◽  
Stability Study ◽  
Side Chain ◽  
Side Chains ◽  
Acceptor Side ◽  
Donor Acceptor

The position and nature of side chains in the donor–acceptor copolymer were investigated in terms of stability in polymer solar cells.

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.

Optimization of side chains in alkylthiothiophene-substituted benzo[1,2-b:4,5-b′]dithiophene-based photovoltaic polymers

2015 ◽  
Vol 6 (14) ◽  
pp. 2752-2760 ◽  
Author(s):  
Shaoqing Zhang ◽  
Mohammad Afsar Uddin ◽  
Wenchao Zhao ◽  
Long Ye ◽  
Han Young Woo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Molecular Design ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Side Chains ◽  
Alkyl Side Chains

Alkyl side chains play critical roles in the molecular design of conjugated polymers for applications in bulk-heterojunction (BHJ) polymer solar cells (PSCs).

scholarly journals Synthesis of New Derivatives of BEDT-TTF: Installation of Alkyl, Ethynyl, and Metal-Binding Side Chains and Formation of Tris(BEDT-TTF) Systems

2021 ◽  
Vol 7 (8) ◽  
pp. 110
Author(s):  
Songjie Yang ◽  
Matteo Zecchini ◽  
Andrew Brooks ◽  
Sara Krivickas ◽  
Desiree Dalligos ◽  
...  
Keyword(s):  
Metal Binding ◽  
Tricarboxylic Acid ◽  
Metal Salts ◽  
Side Chain ◽  
Side Chains ◽  
Ethynyl Group ◽  
X Ray ◽  
Transition Metal Salts ◽  
Alkyl Side Chains ◽  
Derivatives Of

The syntheses of new BEDT-TTF derivatives are described. These comprise BEDT-TTF with one ethynyl group (HC≡C-), with two (n-heptyl) or four (n-butyl) alkyl side chains, with two trans acetal (-CH(OMe)2) groups, with two trans aminomethyl (-CH2NH2) groups, and with an iminodiacetate (-CH2N(CH2CO2−)2 side chain. Three transition metal salts have been prepared from the latter donor, and their magnetic properties are reported. Three tris-donor systems are reported bearing three BEDT-TTF derivatives with ester links to a core derived from benzene-1,3,5-tricarboxylic acid. The stereochemistry and molecular structure of the donors are discussed. X-ray crystal structures of two BEDT-TTF donors are reported: one with two CH(OMe)2 groups and with one a -CH2N(CH2CO2Me)2 side chain.

Engineering Polymer Solar Cells: Advancement in Active Layer Thickness and Morphology

2021 ◽  
Author(s):  
Ritesh Kant Gupta ◽  
Rabindranath Garai ◽  
Maimur Hossain ◽  
Mohammad Adil Afroz ◽  
Dibashmoni Kalita ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Layer Thickness ◽  
Active Layer ◽  
Conversion Efficiency ◽  
High Power ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Active Layer Thickness ◽  
High Power Conversion Efficiency

Achieving high power conversion efficiency (PCE) polymer solar cells (PSCs) has been very challenging and the ultimate goal for their commercialization. Precise investigation of the active layer morphology and newer...

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.

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