The synthesis and properties of a new class of π-expanded diketopyrrolopyrrole analogs and conjugated polymers

2019 ◽  
Vol 6 (16) ◽  
pp. 2974-2980 ◽  
Author(s):  
Yazhou Wang ◽  
Yuchun Xu ◽  
Mahesh Kumar Ravva ◽  
Yaping Yu ◽  
Mingfei Xiao ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Band Gaps ◽  
New Class

A new class of π-expanded diketopyrrolopyrrole analogs has been incorporated into novel alternating conjugated polymers with very low band gaps.

Electronic structure studies of conducting polymers by electron energy-loss spectroscopy

1996 ◽  
Vol 54 ◽  
pp. 160-161
Author(s):  
J. Fink
Keyword(s):  
Electronic Structure ◽  
Conducting Polymers ◽  
Conjugated Polymers ◽  
Electron Acceptors ◽  
Electron Donors ◽  
Light Emitting ◽  
One Dimensional ◽  
New Class ◽  
Electrical Conductivities ◽  
Electron Energy Loss

Conducting polymers comprises a new class of materials achieving electrical conductivities which rival those of the best metals. The parent compounds (conjugated polymers) are quasi-one-dimensional semiconductors. These polymers can be doped by electron acceptors or electron donors. The prototype of these materials is polyacetylene (PA). There are various other conjugated polymers such as polyparaphenylene, polyphenylenevinylene, polypoyrrole or polythiophene. The doped systems, i.e. the conducting polymers, have intersting potential technological applications such as replacement of conventional metals in electronic shielding and antistatic equipment, rechargable batteries, and flexible light emitting diodes.Although these systems have been investigated almost 20 years, the electronic structure of the doped metallic systems is not clear and even the reason for the gap in undoped semiconducting systems is under discussion.

Tight binding models accurately predict band structures for copolymer semiconductors

2020 ◽  
Vol 22 (35) ◽  
pp. 19659-19671 ◽  
Author(s):  
Prithvi Tipirneni ◽  
Vishal Jindal ◽  
Michael J. Janik ◽  
Scott T. Milner
Keyword(s):  
Conjugated Polymers ◽  
Organic Photovoltaics ◽  
Tight Binding ◽  
Band Gaps ◽  
Active Materials ◽  
Band Structures ◽  
Wide Range ◽  
Binding Models

Conjugated polymers possess a wide range of desirable properties including accessible band gaps, plasticity, tunability, mechanical flexibility and synthetic versatility, making them attractive as active materials in organic photovoltaics (OPVs).

Organic Syntheses and Characteristics of Novel Conjugated Polymers for AMOLEDs

2010 ◽  
Vol 75 ◽  
pp. 91-96
Author(s):  
Su Hee Song ◽  
Young Eup Jin ◽  
Joo Young Shim ◽  
Kwang Hee Lee ◽  
Hong Suk Suh
Keyword(s):  
Conjugated Polymers ◽  
Blue Emission ◽  
Wavelength Region ◽  
Emission Spectra ◽  
Polymer Backbone ◽  
Light Emitting ◽  
Long Wavelength ◽  
New Class ◽  
Solid Thin Films ◽  
Pl Emission

Conjugated polymers with a stabilized blue emission are of importance for the realization of large flat panel AMOLED displays using polymer light-emitting diodes. Several novel conjugated polymers using newly developed templates for the stabilized EL emission are reported. Poly(2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[def]phenanthrene)) (PCPP) is a new class of blue-emitting polymers utilizing a new back-bone. This material emits a efficient blue EL without exhibiting any unwanted peak in the long wavelength region (green region) even after prolonged annealing at an elevated temperature of 150oC in air, or operation of the device. New electroluminescent spiro-PCPPs, poly((2,6-(3',6'-bis(2-ethylhexyloxy)-spiro(4H-cyclopenta[def] phenanthrene-4,9'-[9H]fluorene)))-alt-(2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[def]phenanthrene))) (spiro-PCPP-alt-PCPP) and poly((2,6-(3',6'-bis(2-ethylhexyloxy)-spiro(4H-cyclopenta[def] phenanthrene-4,9'-[9H]fluorene)))-alt-(1,4-phenylene)) (spiro-PCPPP), have been synthesized by the Suzuki polymerization. The PL emission spectra of polymers in THF solution show a same maximum peak at 397 nm. The maximum PL emission spectra of polymers appeared at around 463 and 456 nm in solid state, respectively. The PL spectra in solid thin films show more red-shifted over 60 nm than solution conditions. The blue emissions at 400-409 nm for the π–π* transitions of conjugated polymer backbone are almost completely quenched or decreased.

Photovoltaic poly(rod-coil) polymers based on benzodithiophene-centred A–D–A type conjugated segments and dicarboxylate-linked alkyl non-conjugated segments

RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23300-23309 ◽  
Author(s):  
Xuan Xiang ◽  
Wei Shao ◽  
Long Liang ◽  
Xue-Qiang Chen ◽  
Fu-Gang Zhao ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
New Class ◽  
Photovoltaic Materials ◽  
Molecular Compounds

Different from the well-studied photovoltaic conjugated polymers and small molecular compounds, poly(rod-coil) polymers are emerging as a new class of photovoltaic materials.

Synthesis, photophysical and photovoltaic properties of a new class of two-dimensional conjugated polymers containing donor–acceptor chromophores as pendant groups

2013 ◽  
Vol 4 (11) ◽  
pp. 3333 ◽  
Author(s):  
Yu-Ying Lai ◽  
Yen-Ju Cheng ◽  
Chiu-Hsiang Chen ◽  
Sheng-Wen Cheng ◽  
Fong-Yi Cao ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Two Dimensional ◽  
Photovoltaic Properties ◽  
New Class ◽  
Donor Acceptor

scholarly journals Synthesis and characterization of novel donor–acceptor type neutral green electrochromic polymers containing an indolo[3,2-b]carbazole donor and diketopyrrolopyrrole acceptor

RSC Advances ◽  
2018 ◽  
Vol 8 (38) ◽  
pp. 21252-21264 ◽  
Author(s):  
Yan Zhang ◽  
Lingqian Kong ◽  
Xiuping Ju ◽  
Hongmei Du ◽  
Jinsheng Zhao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Conjugated Polymers ◽  
Band Gaps ◽  
Synthesis And Characterization ◽  
Electrochromic Properties ◽  
Electrochromic Polymers ◽  
Donor Acceptor

Two novel neutral green D–A type conjugated polymers were synthesized, illustrating satisfactory electrochromic properties, such as low band gaps, desirable color switches, excellent solubility and favorable thermal stability.

scholarly journals 1D Coordination π–d Conjugated Polymers with Distinct Structures Defined by the Choice of the Transition Metal: Towards a New Class of Antiaromatic Macrocycles

2020 ◽  
Vol 133 (1) ◽  
pp. 443-449
Author(s):  
Vijai M. Santhini ◽  
Christian Wäckerlin ◽  
Aleš Cahlík ◽  
Martin Ondráček ◽  
Simon Pascal ◽  
...  
Keyword(s):  
Transition Metal ◽  
Conjugated Polymers ◽  
New Class

Synthesis and fluorescence study of conjugated polymers based on 2,4,6-triphenylpyridine moieties

2016 ◽  
Vol 40 (7) ◽  
pp. 6281-6288 ◽  
Author(s):  
Qianping Ran ◽  
Jianfeng Ma ◽  
Tao Wang ◽  
Shimin Fan ◽  
Yong Yang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Fluorescence Emission ◽  
Band Gaps ◽  
Quantum Yields ◽  
Fluorescence Study ◽  
Strong Fluorescence ◽  
High Quantum ◽  
Stokes Shifts

Three novel 2,4,6-triphenylpyridine-based conjugated polymers showed strong fluorescence emission with large Stokes' shifts, tunable band gaps and high quantum yields.

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