Fluorescent organic light-emitting diode

White Fluorescent Organic Light-Emitting Diodes. 365... 

D. Qin and Y. Tao, White organic light emitting diodes comprising of blue fluorescence and red phosphorescence, Appl. Phys. Lett., 86 113507-113509 (2005). 

Perylene, a parent pentacyclic aromatic compound, which exhibits a strong fluorescence has found application in laser dyes and organic light emitting diodes (see section 3.8.5.1). The esters of di-, tri- and tetra-carboxylic acids of perylene are lightfast, yellow to red fluorescent chromophores, exemplified by the diisobutyl ester of the... 

One of the most common uses for peri-substituted pentacene is as a red emitter in organic light-emitting diodes (OLEDs). Diphenylpentacene, for example, has a fluorescence quantum yield of 30% as a 0.55% dopant in Alq3, yielding OLED devices with efficiencies near the theoretical maximum [34]. Variation of the aryl substituents improves solubility and processing and can increase fluorescence quantum yield (for example, pentacene 25 has a composite fluorescence quantum yield of 32%) [35]. There is one report of the use of diaryl pentacenes in FET devices, but the performance was generally poor (hole mobility for vapor-deposited 23 was of the order of 10-8 cm2 V-1 s-1) [30]. 

In addition to being a very reactive Diels-Alder diene, l,3,4,5,6,7-hexaphenylbenzo[f]furan was reported to be highly fluorescent in toluene solution, as well as in its solid state. This benzo[f]furan may therefore be used as electron transport material in an organic light-emitting diode <2002SM247>. 

In addition, they are widely used as fluorescent molecules for laser dyes,14 in the emission layer in organic light-emitting diodes,15 and as the fluorophore in fluorescent sensors.1617 Their fluorescence properties are known to depend upon the nature and position of substituents, and therefore several groups have constructed coumarin libraries to discover better coumarin-based materials. 

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