Donor–acceptor conjugated ladder polymer via aromatization-driven thermodynamic annulation

2018 ◽  
Vol 9 (13) ◽  
pp. 1603-1609 ◽  
Author(s):  
Jongbok Lee ◽  
Alexander J. Kalin ◽  
Chenxu Wang ◽  
Julia T. Early ◽  
Mohammed Al-Hashimi ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
High Efficiency ◽  
Donor Acceptor ◽  
Ladder Polymers ◽  
Ladder Polymer

The construction of coplanar conjugated ladder polymers featuring alternating donor–acceptor units has been achieved in high efficiency using ring-closing olefin metathesis.

scholarly journals Thermodynamic synthesis of solution processable ladder polymers

2016 ◽  
Vol 7 (2) ◽  
pp. 881-889 ◽  
Author(s):  
Jongbok Lee ◽  
Bharath Bangalore Rajeeva ◽  
Tianyu Yuan ◽  
Zi-Hao Guo ◽  
Yen-Hao Lin ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Thermodynamic Control ◽  
Ladder Polymers ◽  
Ladder Polymer ◽  
Solution Processable

The synthesis of a carbazole-derived, well-defined ladder polymer was achieved under thermodynamic control by employing reversible ring-closing olefin metathesis.

High-Efficiency Nonfullerene Polymer Solar Cells with Band gap and Absorption Tunable Donor/Acceptor Random Copolymers

2018 ◽  
Vol 11 (2) ◽  
pp. 2189-2196 ◽  
Author(s):  
Da Hun Kim ◽  
Thi Thu Trang Bui ◽  
Shafket Rasool ◽  
Chang Eun Song ◽  
Hang Ken Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
High Efficiency ◽  
Polymer Solar Cells ◽  
Random Copolymers ◽  
Donor Acceptor

scholarly journals Tailoring π-conjugation and vibrational modes to steer on-surface synthesis of pentalene-bridged ladder polymers

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Bruno de la Torre ◽  
Adam Matěj ◽  
Ana Sánchez-Grande ◽  
Borja Cirera ◽  
Benjamin Mallada ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Materials Science ◽  
Second Step ◽  
Vibrational Modes ◽  
Force Microscopy ◽  
Synthetic Strategy ◽  
Atomic Force ◽  
Structures And Properties ◽  
Ladder Polymers ◽  
Ladder Polymer

Abstract The development of synthetic strategies to engineer π-conjugated polymers is of paramount importance in modern chemistry and materials science. Here we introduce a synthetic protocol based on the search for specific vibrational modes through an appropriate tailoring of the π-conjugation of the precursors, in order to increase the attempt frequency of a chemical reaction. First, we design a 1D π-conjugated polymer on Au(111), which is based on bisanthene monomers linked by cumulene bridges that tune specific vibrational modes. In a second step, upon further annealing, such vibrational modes steer the twofold cyclization reaction between adjacent bisanthene moieties, which gives rise to a long pentalene-bridged conjugated ladder polymer featuring a low bandgap. In addition, high resolution atomic force microscopy allows us to identify by atomistic insights the resonance form of the polymer, thus confirming the validity of the Glidewell and Lloyd´s rules for aromaticity. This on-surface synthetic strategy may stimulate exploiting previously precluded reactions towards π-conjugated polymers with specific structures and properties.

Efficient deep-blue non-doped organic light-emitting diode with improved roll-off of efficiency based on hybrid local and charge-transfer excited state

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70085-70090 ◽  
Author(s):  
Haichao Liu ◽  
Qing Bai ◽  
Weijun Li ◽  
Yachen Guo ◽  
Liang Yao ◽  
...  
Keyword(s):  
Excited State ◽  
High Efficiency ◽  
Light Emitting Diode ◽  
Blue Emission ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Deep Blue ◽  
Organic Light ◽  
Slow Roll ◽  
Donor Acceptor

Acceptor–donor–acceptor triphenylamine–phenanthroimidazole derivate (TPA–2PPI) servers as an emitter, whose device exhibits deep-blue emission, high efficiency and slow roll-off of efficiency.

A Donor–Acceptor-type Host Material for Solution-processed Phosphorescent Organic Light-emitting Devices Showing High Efficiency

2014 ◽  
Vol 43 (12) ◽  
pp. 1935-1936 ◽  
Author(s):  
Chang-Hwa Jun ◽  
Yong-Jin Pu ◽  
Masahiro Igarashi ◽  
Takayuki Chiba ◽  
Hisahiro Sasabe ◽  
...  
Keyword(s):  
High Efficiency ◽  
Host Material ◽  
Solution Processed ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Type Host ◽  
Organic Light ◽  
Donor Acceptor ◽  
Organic Light Emitting Devices

Rational design of high efficiency green to deep red/near-infrared emitting materials based on isomeric donor–acceptor chromophores

2019 ◽  
Vol 7 (7) ◽  
pp. 1880-1887 ◽  
Author(s):  
Youming Zhang ◽  
Zhao Chen ◽  
Jun Song ◽  
Junjie He ◽  
Xin Wang ◽  
...  
Keyword(s):  
Rational Design ◽  
Near Infrared ◽  
High Efficiency ◽  
Quantum Yields ◽  
Donor Acceptor

A family of chromophores with an isomeric donor–acceptor framework are synthesized, which show remarkably different emission wavelengths with high photoluminescence quantum yields and decent electroluminescent efficiencies.

scholarly journals All-small-molecule organic solar cells with over 14% efficiency by optimizing hierarchical morphologies

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ruimin Zhou ◽  
Zhaoyan Jiang ◽  
Chen Yang ◽  
Jianwei Yu ◽  
Jirui Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Photovoltaic System ◽  
Active Layers ◽  
Donor Acceptor

AbstractThe high efficiency all-small-molecule organic solar cells (OSCs) normally require optimized morphology in their bulk heterojunction active layers. Herein, a small-molecule donor is designed and synthesized, and single-crystal structural analyses reveal its explicit molecular planarity and compact intermolecular packing. A promising narrow bandgap small-molecule with absorption edge of more than 930 nm along with our home-designed small molecule is selected as electron acceptors. To the best of our knowledge, the binary all-small-molecule OSCs achieve the highest efficiency of 14.34% by optimizing their hierarchical morphologies, in which the donor or acceptor rich domains with size up to ca. 70 nm, and the donor crystals of tens of nanometers, together with the donor-acceptor blending, are proved coexisting in the hierarchical large domain. All-small-molecule photovoltaic system shows its promising for high performance OSCs, and our study is likely to lead to insights in relations between bulk heterojunction structure and photovoltaic performance.

Long-Term Thermal Stability of High-Efficiency Polymer Solar Cells Based on Photocrosslinkable Donor-Acceptor Conjugated Polymers

2011 ◽  
Vol 23 (14) ◽  
pp. 1660-1664 ◽  
Author(s):  
Gianmarco Griffini ◽  
Jessica D. Douglas ◽  
Claudia Piliego ◽  
Thomas W. Holcombe ◽  
Stefano Turri ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solar Cells ◽  
Conjugated Polymers ◽  
High Efficiency ◽  
Polymer Solar Cells ◽  
Donor Acceptor ◽  
Thermal Stability Of
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