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

Photochemical Patterning Approaches for Multicolor Polymer Light Emitting Devices

2003 ◽  
Vol 771 ◽  
Author(s):  
A. Pogantsch ◽  
G. Trattnig ◽  
S. Rentenberger ◽  
G. Langer ◽  
J. Keplinger ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Active Agent ◽  
Direct Writing ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Current Topic ◽  
Ink Jet ◽  
Jet Printing ◽  
Polymer Light Emitting Devices ◽  
Device Technology

AbstractThe patterning of conjugated polymers for multicolored electroluminescence applications is a current topic of research in polymer device technology. Several techniques including direct writing approaches such as ink-jet printing have been proposed to solve this challenge. We present an approach to tuning the (electro)luminescence color of a film consisting of a blend of conjugated polymers after its deposition by means of UV-irradiation in the presence of an active agent. This promises to be an alternative, highly parallel approach towards multicolored electroluminescence.

scholarly journals Unveiling the Effects of Interchain Hydrogen Bonds on Solution Gelation and Mechanical Properties of Diarylfluorene-Based Semiconductor Polymers

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Lubing Bai ◽  
Yamin Han ◽  
Chen Sun ◽  
Xiang An ◽  
Chuanxin Wei ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bonds ◽  
Conjugated Polymers ◽  
Universal Method ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Prospective Application ◽  
Thinning Process ◽  
Toughness Enhancement ◽  
Polymer Light Emitting Devices

The intrinsically rigid and limited strain of most conjugated polymers has encouraged us to optimize the extensible properties of conjugated polymers. Herein, learning from the hydrogen bonds in glucose, which were facilitated to the toughness enhancement of cellulose, we introduced interchain hydrogen bonds to polydiarylfluorene by amide-containing side chains. Through tuning the copolymerization ratio, we systematically investigated their influence on the hierarchical condensed structures, rheology behavior, tensile performances, and optoelectronic properties of conjugated polymers. Compared to the reference copolymers with a low ratio of amide units, copolymers with 30% and 40% amide units present a feature of the shear-thinning process that resembled the non-Newtonian fluid, which was enabled by the interchain dynamic hydrogen bonds. Besides, we developed a practical and universal method for measuring the intrinsic mechanical properties of conjugated polymers. We demonstrated the significant impact of hydrogen bonds in solution gelation, material crystallization, and thin film stretchability. Impressively, the breaking elongation for P4 was even up to ~30%, which confirmed the partially enhanced film ductility and toughness due to the increased amide groups. Furthermore, polymer light-emitting devices (PLEDs) based on these copolymers presented comparable performances and stable electroluminescence (EL). Thin films of these copolymers also exhibited random laser emission with the threshold as low as 0.52 μJ/cm2, suggesting the wide prospective application in the field of flexible optoelectronic devices.

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

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.

The Silica-Coated Gold Nanoparticles Encapsulation of Plastic Polymer Light- Emitting Devices

2019 ◽  
Vol 19 (15) ◽  
pp. 9-15 ◽  
Author(s):  
Pin-Hsiang Chiu ◽  
Kan-Lin Chen ◽  
Chien-Jung Huang ◽  
Jenn-Kai Tsai ◽  
Cheng-Fu Yang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Polymer Light Emitting Devices

scholarly journals LED to LEC Transition Behavior in Polymer Light-Emitting Devices

2008 ◽  
Vol 20 (8) ◽  
pp. NA-NA
Author(s):  
Yan Shao ◽  
Guillermo C. Bazan ◽  
Alan J. Heeger
Keyword(s):  
Light Emitting ◽  
Light Emitting Devices ◽  
Transition Behavior ◽  
Polymer Light Emitting Devices
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