Blue fluorescent emitters

Blue fluorescent emitters based on fused polyaromatic ring systems have long been known and systematic work has steadily improved the efficiencies and colors, while pushing the limits of stability in an operational device. A sky blue based on styrylamine doped 2-methyl-9,10-di(2-naphthyl)anthracene OLED was reported to provide the highest efficiency device (Scheme 3.99) [365],... 

Blue fluorescent emitters Design tactics and applications in organic light-emitting diodes 13CSR4963. 

A 4-diphenylphosphinoyl-4 -diphenylamino-biphenyl was synthesized via the metallation and phosphinoylation of the corresponding aryl bromide (Scheme 8). The end-product is a high performance deep-blue fluorescent emitter and green phosphorescent host. ... 

A. Molecular Glasses as Fluorescent Emitters From the Blue into the Red... 

OLEDs as luminescent sources, especially as blue light emitters characterized by their high fluorescence quantiun yields. 

The vacuum ultraviolet photolysis of formic acid yielded blue fluorescence, although the emitter was not identified [Style and Ward (953)]. 

A brilliant emitter. Certain naphthalene derivatives exhibit a weak yellow fluorescence when they are in a highly polar environment (such as water) and an intense blue fluorescence when they are in a markedly nonpolar environment (such as hexane). The binding of e-dansyl-lysine to specific antibody is accompanied by a marked increase in its fluorescence intensity and a shift in color from yellow to blue. What does this finding reveal about the hapten-antibody complex ... 

The triplet-harvesting mechanism was confirmed by efficiency analysis of the BIY device spectra. A blue fluorescent (BE) device was constructed similarly to the BIY except that the phosphorescent emitter was omitted. The blue portion of the spectrum (380-512 nm) of the BE device exhibits 4.9% EQE, indicating very efficient fluorescence. Figure 14.52 shows that devices B Y and BE have nearly identical spectral radiance for the blue component of the electroluminescence. Thus, fluorescence remained the same while the addition of the phosphorescent dopant to the BE device resulted in the appearance... 

Spectra of blue yellow (B Y) harvesting hybrid and blue fluorescent OLEDs. Blue device has the same structiue as B Y except that the yeUow phosphorescent emitter is omitted. Data are taken at ImA/cm. Inset Structure of the yeUow phosphorescent dopant. 

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