Polymeric anodes for improved polymer light-emitting diode performance

Abstract

An electroluminescent device comprising a transparent or translucent Support, a transparent or translucent first electrode, a Second conductive electrode and an electrolu minescent phosphor layer Sandwiched between the transpar ent or translucent first electrode and the Second conductive electrode, wherein the first and Second electrodes each comprises a polymer or copolymer of a 3,4dialkoxythiophene, which may be the Same or different, in which the two alkoxy groups may be the same or different or together represent an optionally Substituted oxy-alkylene oxy bridge; a display comprising the above-mentioned elec troluminescent device; a lamp comprising the above mentioned electroluminescent device; manufacturing processes for the above-mentioned electroluminescent devices, and the use of Such devices for the integrated backlighting of Static and dynamic posters and Signage.

Correlation between the Indium Tin Oxide morphology and the performances of polymer light-emitting diodes

“…Many surface treatments of the ITO have been employed to improve the device performance, including aqua regia treatment [3], oxygen plasma treatment [4], [5], [6] and [7], atmospheric plasma treatment [8], ultra-violet ozone treatment [9], carbon tetrafluoride/oxygen treatment [10] and various coating treatments such as for example self-assembled monolayers [11] and [12]. Alternatively, by inserting an additional thin layer, such as copper-phtalocyanine [13], polyaniline [14], poly(3,4-ethylene dioxythiophene) doped with polystyrene sulfonate (PEDOT-PSS) [15] and [16], inorganic or organic insulators [17] and [18], emission intensity and device stability can be improved by lowering the driving voltage. The effects of such a buffer layer include the reduction of hole-injection energy barrier and the removal of contaminants from the ITO surface.…”

Progress on a Photovoltaic Cell Design Consisting of Silicon Nanowires and Poly (3‐ hexylthiophene)

“…Polyethyldioxythiophene (PDOT) and polystyrenesulforic acid (PSS) doped PDOT, which have higher work functions than ITO [18,19,42], have been utilized as cathodes in organic PV cells [71] and presents additional options for optimizing the V OC of the SiNW/P3HT PV cell. Of course, the functionality of these polymers are also sensitive to morphology, solvents, and annealing [72].…”

Nanocasting nanoporous inorganic and organic materials from polymeric bicontinuous microemulsion templates

“…Consequently, it has been suggested for use in a wide range of applications, including antistatic coatings, capacitors, thin-film transistors, and electroluminescent and photovoltaic devices. [123][124][125][126][127][128][129][130] Owing to the demand for porous materials with good stability, high conductivity and large internal surface area in sensor, battery, capacitor and storage technologies, 131 it is desirable to develop PEDOT materials possessing controlled porosity. To this end, a high-surface-area PEDOT electrode has been demonstrated as an effective O 2 reduction catalyst in fuel cells and batteries, 132 and macroporous PEDOT films have been used as counter-electrodes in dye-sensitized solar cells.…”