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A fluorescent/phosphorescent hybrid white light organic light-emitting diode and its preparation method

A light-emitting diode and hybrid technology, applied in the field of porous materials, can solve the problems of spectral instability and efficiency roll-off, and achieve the effects of good spectral stability, low efficiency roll-off and high color rendering index

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the efficiency of fluorescent / phosphorescent hybrid white OLEDs is far from the expected results, and there are still problems of efficiency roll-off and spectral instability at high brightness.

Method used

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  • A fluorescent/phosphorescent hybrid white light organic light-emitting diode and its preparation method
  • A fluorescent/phosphorescent hybrid white light organic light-emitting diode and its preparation method
  • A fluorescent/phosphorescent hybrid white light organic light-emitting diode and its preparation method

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Embodiment

[0030] A fluorescent / phosphorescent hybrid white light organic light-emitting diode in this embodiment, its structural schematic diagram is as follows figure 1 As shown, it includes a glass ITO anode 1, a hole injection layer 2, a hole transport layer 3, an electron blocking layer 4, a light emitting layer 5, an electron transport layer 6, an electron injection layer 7 and an aluminum cathode 8, wherein the light emitting layer 5 is sequentially It consists of an ultra-thin red phosphorescent emitting layer R, a light color adjustment spacer layer S, an ultra-thin yellow phosphorescent emitting layer Y, and a blue fluorescent emitting layer B of a hole-transporting material. 1 , Electron transport type material blue light fluorescent emitting layer B 2 , composed of ultra-thin green phosphorescent emitting layer G. In this device, the material of the hole injection layer 2 is HATCN, and its film thickness is 15 ± 2 nanometers; the material of the hole transport layer 3 is TAP...

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Abstract

The invention belongs to the field of porous materials, and discloses a fluorescent / phosphorescent mixed white light organic light-emitting diode and a preparation method thereof. The structure of the fluorescent / phosphorescent hybrid white light organic light-emitting diode includes a glass ITO anode, a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, an electron transport layer, an electron injection layer and an aluminum cathode from bottom to top. ; The light-emitting layer sequentially includes a red phosphorescent light-emitting layer, a light color adjustment spacer layer, a yellow phosphorescent light-emitting layer, a blue fluorescent light-emitting layer and a green phosphorescent light-emitting layer from bottom to top. The organic light-emitting diode of the invention exhibits electroluminescence characteristics of high efficiency, high color rendering index, good spectral stability and low efficiency roll-off under high brightness, and has good application potential in the fields of display and lighting.

Description

technical field [0001] The invention belongs to the field of porous materials, and in particular relates to a fluorescent / phosphorescent mixed white light organic light-emitting diode and a preparation method thereof. Background technique [0002] Organic Light-Emitting Diode (English: Organic Light-Emitting Diode, abbreviation: OLED) has been reported since the 1950s and 1960s and made a breakthrough in 1987. OLED has achieved remarkable development. The advantages of rich colors, high color gamut, shadowless, light and thin, fast response, no blue light damage, easy large-scale production, flexibility, bendability, and transparency make it unique in the field of display and lighting. The next generation of display and lighting technology. White light OLED is a necessary technology to realize full-color display and lighting, especially as a healthy lighting source, high efficiency, low efficiency roll-off and low cost are important development directions. At present, from...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/56
CPCH10K71/16H10K50/11H10K2101/40H10K50/13H10K50/16H10K50/15
Inventor 马东阁陈玉文杨德志代岩峰孙倩乔现锋陈江山
Owner SOUTH CHINA UNIV OF TECH
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