Low-voltage and high-efficiency organic LED and preparation method thereof
A light-emitting diode, high-efficiency technology, applied in the direction of organic light-emitting devices, organic light-emitting device structures, organic semiconductor device materials, etc., can solve the problems of efficiency attenuation, narrow exciton formation area, etc., and achieve lower driving voltage, low driving voltage, The effect of delaying the decay of efficiency
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[0018] A low-voltage high-efficiency organic light-emitting diode, such as figure 1 As shown, it consists of a glass substrate with ITO, a hole transport layer, a p-type doped light-emitting layer, an i-type intrinsic light-emitting layer, an n-type doped light-emitting layer, an electron transport layer, a composite electron injection layer and a cathode A stacked structure is formed in sequence, in which the p-type doped light-emitting layer uses a hole transport material doped with a blue fluorescent dye; the i-type intrinsic light-emitting layer uses a blue fluorescent dye; the n-type doped light-emitting layer uses an electron doped with a blue fluorescent dye Transport material, the three-layer light-emitting layer is referred to as p-i-n light-emitting layer, the composite electron injection layer is composed of cesium carbonate inserted into a thin aluminum layer, and the thickness of each layer of film is 30nm for the hole transport layer, 12nm for the p-type doped lig...
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