White light emission from a single layer organic light emitting diode fabricated by spincoating

White organic light-emitting diodes based on improved polyfluorene derivative

“…Up to now, the white emissions are obtained by mixing three basic-color-lights from different emitting molecules. The conformations of white OLEDs usually can be divided into two kinds, one is the EL devices based on the blend of three basic-color-emitting materials as emitting layer [8][9][10][11][12][13][14] and another is the multi-layer EL devices consisting of three basic-color emitting layers [15][16][17][18][19]. For both of the two kinds, it is required that the red fluorescent dye is dispersed and isolated in host materials to avoid concentration quenching [20].…”

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.…”

High-brightness, high-color-purity, white organic light-emitting diodes featuring multiple emission layers

“…1, [7][8][9][10][11][12][13][14][15][16][17][18][19] For phosphorescent white OLEDs, the highest power efficiency reported has been 57 lm/W. 2 Fluorescent white OLEDs have been developed featuring several device structures, including ͑i͒ multilayer devices containing the three primary colors 1,7-9 or two appropriate colors 10-13 from respective layers, ͑ii͒ single-emission-layer devices containing a white emission material, [14][15][16][17][18][19] and ͑iii͒ doped devices containing a host material and a primary-color fluorescent dye, excimer, and exciplex emission. In single-emitting-layer devices containing hosts and dopants, a common problem faced for white OLEDs is the need for very precise control over the concentrations of the dopants.…”