Light-emitting OLEDS

T.K. Hatwar, J.R. Vargas, and V.V. Jarikov, Stabilized white-light-emitting OLED devices employing a stabilizing substituted perylene material, U.S. Patent 2,005,089,714, pp. 21 (2005). 

The EML with a multilayer structure for the lanthanide ions is very different from that of other phosphor materials such as iridium complexes. Multilayer structures with EMLs usually emit hybrid light which is used in white light emitting OLEDs [33]. For lanthanide complexes extremely pure light is achievable, because their emission is due to electronic transitions of... 

A recent OLED design involved a three-color emission to produce a white-light emitting OLED, as shown in 7,2.35., given on the next page. Note that the construction is similar to that we have already presented. The only difference is that three different colored emitting strata are involved ... 

Isobenzofurans are reactive Diels-Alder dienes, and they have been used for the construction of aromatic skeletons extensively [26]. A mixture of endo/exo cycloadducts obtained from the Diels-Alder reaction of isobenzofuran with a variety of dienophdes underwent dehydration under acidic conditions to give aromatic compounds. Isobenzofuran was generated in situ in the reaction by the loss of ethanol from the starting material cyclic acetal (Scheme 16.25) [27]. Using the approach in Scheme 16.25, a variety of naphthalimides have been synthesized that find application in DNA detection and white light-emitting OLEDs [28]. 

The possibility of controlling ihc morphological and structural order in the solid is therefore a fundamental requirement for the control and reproducibility of the emission properties of a luminescent material within an organic light emitting diode (OLED) device. 

Poly-(acetylene)s are widely used in different fields, such as organic light-emitting diodes (OLEDS), solar cells, and lasers.135 Synthesis... 

To date, most small molecule-based OLEDs are prepared by vapor deposition of the metal-organic light-emitting molecules. Such molecules must, therefore, be thermally stable, highly fluorescent (in the solid state), form thin films on vacuum deposition, and be capable of transporting electrons. These properties limit the number of metal coordination compounds that can be used in OLED fabrication. 

As a class of n-type organic semiconductors, PBI derivatives have received considerable attention for a variety of applications [312, 313], for example, for organic or polymer light-emitting diodes (OLEDs and PLEDs) [314, 315], thin-film organic field-effect transistors (OFETs) [316, 317], solar cells [318, 319], and liquid crystals [320]. They are also interesting candidates for single-molecule device applications, such as sensors [321], molecular wires [322], or transistors [141]. 

J Wang and G Yu, Performance Simulation of Active-Matrix OLED Displays, Photonics Asia 2004 Light-Emitting Diode Materials and Devices, Beijing, China, 2004, pp. 32-44. 

For recent review on white-emitting OLEDs see B.W. D Andrade and S.R. Forrest, White organic light-emitting devices for solid-state lighting, Adv. Mater., 16 1585-1595, 2004. 

The simplest manifestation of an OLED is a sandwich structure consisting of an emission layer (EML) between an anode and a cathode. More typical is an increased complexity OLED structure consisting of an anode, an anode buffer or hole injection layer (HIL), a hole transport layer (HTL), a light-emitting layer, an electron transport layer (ETL), a cathode... 

Organic light emitting diodes (OLEDs) for general illumination update 2002... 

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