Conjugated polymers. New materials for optoelectronic devices

2001 ◽  
Vol 73 (3) ◽  
pp. 425-430 ◽  
Author(s):  
R. H. Friend
Keyword(s):  
Conjugated Polymers ◽  
Active Components ◽  
Semiconducting Polymer ◽  
Active Matrix ◽  
Semiconductor Physics ◽  
Light Emitting ◽  
Film Forming ◽  
Recent Developments ◽  
Operating Lifetime ◽  
Polymer Light Emitting Diodes

Conjugated polymers now provide a class of processible, film-forming semiconductors and metals. We have worked on the development of the semiconductor physics of these materials by using them as the active components in a range of semiconductor devices. Polymer light-emitting diodes show particular promise, and recent developments in color range (red, green, and blue), efficiency (above 20 lumen/W for green emitters), and operating lifetime are discussed. Progress on their application to displays, with integration with active-matrix TFT drive, and with patterned deposition using inkjet printing techniques is also reviewed. The role played by interfaces between electrode and semiconducting polymer is also discussed.

Water/alcohol soluble conjugated polymers for the interface engineering of highly efficient polymer light-emitting diodes and polymer solar cells

2015 ◽  
Vol 51 (26) ◽  
pp. 5572-5585 ◽  
Author(s):  
Zhicheng Hu ◽  
Kai Zhang ◽  
Fei Huang ◽  
Yong Cao
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Light Emitting Diodes ◽  
Polymer Solar Cells ◽  
Interface Engineering ◽  
Light Emitting ◽  
Highly Efficient ◽  
Recent Developments ◽  
Polymer Light Emitting Diodes ◽  
Water Alcohol

This review provides a summary of the recent developments and applications of water/alcohol soluble conjugated polymers in highly efficient polymer light-emitting diodes and polymer solar cells.

Injecting Inter-Layers and the Built-in Potential of Blue Polymer Light-Emitting Diodes

2000 ◽  
Vol 660 ◽  
Author(s):  
Thomas M. Brown ◽  
Ian S. Millard ◽  
David J. Lacey ◽  
Jeremy H. Burroughes ◽  
Richard H. Friend ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Light Emitting Diodes ◽  
Basic Structure ◽  
Thin Layers ◽  
Carrier Injection ◽  
Semiconducting Polymer ◽  
Light Emitting ◽  
Physical Mechanisms ◽  
Organic Solid ◽  
Polymer Light Emitting Diodes

ABSTRACTThe semiconducting-polymer/injecting-electrode heterojunction plays a crucial part in the operation of organic solid state devices. In polymer light-emitting diodes (LEDs), a common fundamental structure employed is Indium-Tin-Oxide/Polymer/Al. However, in order to fabricate efficient devices, alterations to this basic structure have to be carried out. The insertion of thin layers, between the electrodes and the emitting polymer, has been shown to greatly enhance LED performance, although the physical mechanisms underlying this effect remain unclear. Here, we use electro-absorption measurements of the built-in potential to monitor shifts in the barrier height at the electrode/polymer interface. We demonstrate that the main advantage brought about by inter-layers, such as poly(ethylenedioxythiophene)/poly(styrene sulphonic acid) (PEDOT:PSS) at the anode and Ca, LiF and CsF at the cathode, is a marked reduction of the barrier to carrier injection. The electro- absorption results also correlate with the electroluminescent characteristics of the LEDs.

scholarly journals Side-chain conjugated polymers for use in the active layers of hybrid semiconducting polymer/quantum dot light emitting diodes

2016 ◽  
Vol 7 (1) ◽  
pp. 101-112 ◽  
Author(s):  
Ana Fokina ◽  
Yeonkyung Lee ◽  
Jun Hyuk Chang ◽  
Lydia Braun ◽  
Wan Ki Bae ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Conjugated Polymers ◽  
Light Emitting Diodes ◽  
Side Chain ◽  
Hybrid Polymer ◽  
Semiconducting Polymer ◽  
Light Emitting ◽  
Active Layers

Three monomers,M1–M3, with modified carbazole cores and styrene functionality were polymerized by RAFT. The polymers were then used in the active layers of hybrid polymer/quantum dot light emitting diodes.

Synthesis of New Blue Anthracene-based Conjugated Polymers and Their Applications in Polymer Light-Emitting Diodes

2011 ◽  
Vol 212 (11) ◽  
pp. 1100-1108 ◽  
Author(s):  
Hung-Min Shih ◽  
Cheng-Jui Lin ◽  
Shin-Rong Tseng ◽  
Chih-Hung Lin ◽  
Chain-Shu Hsu
Keyword(s):  
Conjugated Polymers ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes

Time-Resolved Transport of Electrons and Holes in Conjugated Polymers

1999 ◽  
Vol 561 ◽  
Author(s):  
D. Pinner ◽  
R. H. Friend ◽  
N. Tessler
Keyword(s):  
Conjugated Polymers ◽  
Temporal Evolution ◽  
Exponential Tail ◽  
Time Resolved ◽  
Light Emitting ◽  
Turn On ◽  
Initial Rise ◽  
Order Of Magnitude ◽  
Slow Rise ◽  
Polymer Light Emitting Diodes

ABSTRACTDetailed experimental and theoretical analysis of the pulsed excitation of polymer light emitting diodes is presented. We find a set of universal transient features for different device configurations which can be reproduced using our phenomenological numerical model. We find that the temporal evolution of the electroluminescence can be characterised by five main features: i) a delay followed by; ii) fast initial rise at turn-on followed by; iii) a slow rise (slower by at least one order of magnitude); iv) fast modulation (<15ns, unresolved) at turn-off followed by v) a long-lived exponential tail. We suggest a method for extracting mobility values which is found to be compatible with CW drive schemes. Mobilities for holes and electrons are extracted for a poly(p-phenylenevinylene) co-polymer and poly(di-octyl fluorene).

Organic Materials for Large Area Electronics

2008 ◽  
Vol 608 ◽  
pp. 159-179 ◽  
Author(s):  
Richard Friend
Keyword(s):  
Thin Films ◽  
Field Effect ◽  
Organic Materials ◽  
Field Effect Transistors ◽  
Semiconductor Devices ◽  
Large Area ◽  
Active Matrix ◽  
Semiconductor Physics ◽  
Light Emitting ◽  
Wide Range

Organic materials have been developed to operate as the active semiconductor in a wide range of semiconductor devices, including light-emitting diodes, LEDs, field-effect transistors, FETs, and photovoltaic diodes, PVs. The ability to process these materials as thin films over large areas makes possible a range of applications, currently in displays, as LEDs and as active matrix FET arrays, and solar cells. This article reviews developments in semiconductor physics of these materials and in their application in semiconductor devices

Sign in / Sign up

Export Citation Format

Share Document