Blue electroluminescent devices with high quantum efficiency from alkoxy-substituted poly(para-phenylene vinylene)-trimers in a polystyrene matrix

Abstract

We report electroluminescence of electroluminescent devices fabricated from cis,trans- 2,5-dimethoxy-1,4 -bis[2-(3,4,5-trimethoxyphenyl)ethenyl]benzene blended in a polystyrene matrix as emission layer. This choice of materials avoids the inherently poor miscibility of polymers with other compounds and minimizes interactions between the host polymer and the electro-optically active guest, which can produce quenching sites. A blue light-emitting device with high internal quantum efficiency (∼1%) results.

Optical Applications

“…2b,c) or else they can be blended within a soluble polymer [10][11][12]14, 151 or chemically grafted as pendent side-chains on a polymer backbone [16,171, as shown in Fig. 14, below.…”

“…[12] have used alkoxy-substituted distyrylbenzenes blended within a polystyrene matrix to achieve blue electroluminescence, peaked at 450 nm (see Fig. 13), with a relatively high internal quantum efficiency of around 1%.…”

Quantum chemical study of self-doping PPV oligomers: spin distribution of the radical forms

“…Within the class of oligomeric or low-molecular-weight organic semiconductors distyrylbenzenes (DSBs)-oligomers of poly(p-phenylene vinylene) or PPV and their derivatives enjoy a great deal of interest as new materials for opto-electronic applications such as organic lightemitting diodes (OLEDs) [1][2][3][4][5][6][7], gas-and ion-selective sensors [8,9,10,11], organic memories, and nonlinear optics (NLO) [12]. In a number of these applications, the oligomers need to be in their electrically conducting state (the neutral compounds are electrical insulators) and this can be easily achieved by oxidizing or reducing them using either a chemical or an electrochemical procedure; the latter has the advantage that the active material can be electro-deposited from a standard electrochemical cell directly onto a pre-chosen substrate.…”

Influence from Thermal Elimination Temperature of Precursor Polymer and Film‐forming Methods on the Photophysics of the Poly(2,5‐didodecyloxy‐p‐phenylenevinylene)

“…[1][2][3][4][5][6][7] There are several routines, such as Wessling, 8 Glich, 9,10 Wittig, 11 and Heck Coupling 12 to prepare PPV. Wessling method was demonstrated irreplaceable advantages in some respects due to the easiness in handling and characterization of the polymer precursor.…”