Synthesis and optical properties of light-emitting π-conjugated polymers containing biphenyl and dithienosilole

2007 ◽  
Vol 45 (10) ◽  
pp. 2048-2058 ◽  
Author(s):  
Liang Liao ◽  
Ali Cirpan ◽  
Qinghui Chu ◽  
Frank E. Karasz ◽  
Yi Pang
Keyword(s):  
Optical Properties ◽  
Conjugated Polymers ◽  
Light Emitting

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.

Color Variable Bipolar/AC Light-Emitting Devices Based on Conjugated Polymers

1997 ◽  
Author(s):  
Y. Z. Wang ◽  
D. D. Gebler ◽  
D. K. Fu ◽  
T. M. Swager ◽  
A. J. Epstein
Keyword(s):  
Conjugated Polymers ◽  
Light Emitting ◽  
Light Emitting Devices

scholarly journals Synthesis of π-Conjugated Polymers Containing Benzotriazole Units via Palladium-Catalyzed Direct C-H Cross-Coupling Polycondensation for OLEDs Applications

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 254
Author(s):  
Dong Han ◽  
Jingwen Li ◽  
Qiang Zhang ◽  
Zewang He ◽  
Zhiwei Wu ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Quantum Efficiency ◽  
Cross Coupling ◽  
Building Blocks ◽  
Gravimetric Analysis ◽  
19F Nmr Spectra ◽  
Light Emitting ◽  
Molecular Weights ◽  
Palladium Catalyzed ◽  
Red Luminescence

Four D-π-A conjugated polymers, namely P1–P4, which contain benzotriazole building blocks in their backbone as acceptor, are synthesized via palladium-catalyzed direct C-H cross-coupling polycondensation of 5,6-difluorobenzotriazole with different thiophene derivatives, including 3-octylthiophene, 2,2’-bithiophene, thieno[3,4-b][1,4]dioxine, and 4,4-dioctyl-4H-silolo-[3,2-b:4,5-b’]dithiophene as donor units, respectively. Taking the polymer P1 as an example, the chemical structure of the polymer is demonstrated by 1H and 19F NMR spectra. The optical, electrochemical, and thermal properties of these polymers are assessed by UV–vis absorption and fluorescence spectroscopy, cyclic voltammetry (CV), and thermal gravimetric analysis (TGA), respectively. DFT simulations of all polymers are also performed to understand their physicochemical properties. Furthermore, P1 and P2, which have relatively higher molecular weights and better fluorescent quantum efficiency than those of P3 and P4, are utilized as lighting emitters for organic light-emitting diodes (OLEDs), affording promising green and red luminescence with 0.07% and 0.14% of maximum external quantum efficiency, respectively, based on a device with an architecture of ITO/PEDOT:PSS/PTAA/the polymer emitting layer/TPBi/LiF/Al.

Conjugated Polymer Surfaces and Interfaces for Light-Emitting Devices

MRS Bulletin ◽  
1997 ◽  
Vol 22 (6) ◽  
pp. 46-51 ◽  
Author(s):  
W.R. Salaneck ◽  
J.L. Brédas
Keyword(s):  
Conjugated Polymers ◽  
Photoelectron Spectroscopy ◽  
Electronic Materials ◽  
Structural Information ◽  
Molecular Solids ◽  
Chemical Modeling ◽  
Polymer Leds ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Surfaces And Interfaces

Since the discovery of high electrical conductivity in doped polyacetylene in 1977, π-conjugated polymers have emerged as viable semiconducting electronic materials for numerous applications. In the context of polymer electronic devices, one must understand the nature of the polymer surface's electronic structure and the interface with metals. For conjugated polymers, photoelectron spectroscopy—especially in connection with quantum-chemical modeling—provides a maximum amount of both chemical and electronic structural information in one (type of) measurement. Some details of the early stages of interface formation with metals on the surfaces of conjugated polymers and model molecular solids in connection with polymer-based light-emitting devices (LEDs) are outlined. Then a chosen set of issues is summarized in a band structure diagram for a polymer LED, based upon a “clean calcium electrode” on the clean surface of a thin film of poly(p-phenylene vinylene) (PPV). This diagram helps to point out the complexity of the systems involved in polymer LEDs. No such thing as “an ideal metal-on-polymer contact” exists. There is always some chemistry occurring at the interface.

Band gap tuning of new light emitting conjugated polymers

2003 ◽  
Vol 21 (1-3) ◽  
pp. 199-203 ◽  
Author(s):  
Do-Hoon Hwang ◽  
Nam Sung Cho ◽  
Byung-Jun Jung ◽  
Hong-Ku Shim ◽  
Jeong-Ik Lee ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Light Emitting ◽  
Band Gap Tuning

Direct Sub-Micrometer-Patterning of Conjugated Polymers and Polymer Light-Emitting Devices by Electron Beam Lithography

2010 ◽  
Vol 211 (13) ◽  
pp. 1402-1407 ◽  
Author(s):  
Evelin Fisslthaler ◽  
Meltem Sezen ◽  
Harald Plank ◽  
Alexander Blümel ◽  
Stefan Sax ◽  
...  
Keyword(s):  
Electron Beam ◽  
Conjugated Polymers ◽  
Electron Beam Lithography ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Polymer Light Emitting Devices

Light-Emitting Diodes from Fluorene-Based π-Conjugated Polymers

2000 ◽  
Vol 12 (7) ◽  
pp. 1931-1936 ◽  
Author(s):  
Anne Donat-Bouillud ◽  
Isabelle Lévesque ◽  
Ye Tao ◽  
Marie D'Iorio ◽  
Serge Beaupré, ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Light Emitting Diodes ◽  
Light Emitting

scholarly journals Linear and nonlinear optical properties of the conjugated polymers PPV and MEH-PPV

1999 ◽  
Vol 59 (23) ◽  
pp. 15133-15142 ◽  
Author(s):  
S. J. Martin ◽  
D. D. C. Bradley ◽  
P. A. Lane ◽  
H. Mellor ◽  
P. L. Burn
Keyword(s):  
Optical Properties ◽  
Conjugated Polymers ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Linear And Nonlinear
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