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Syntheses of TPE dyes 1 and 2. Inset: crystal structure of 1.
(Color online) (a) PL spectra of 2 in acetonitrile and water/acetonitrile mixtures . (b) Plots of fluorescence quantum yields of 1 and 2 vs compositions of the water/acetonitrile mixtures. Inset: photos of the solutions of 2 in the water/acetonitrile mixtures with 0% and 90% water fractions.
(a) characteristic and (b) current efficiency of an OLED device of 2. Inset in panel (b): EL spectrum of the device and PL spectra of amorphous and crystalline films of the dye.
(Color online) Photos of the spots of dye 2 on the TLC plates placed in the Petri-dish sets (a) without and (b) with saturated chloroform vapors. Photo in panel (c) was taken after the organic vapors in panel (b) had been evacuated.
(a) PL and EL spectra of dye 1 and (b) characteristic of its OLED.
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