Solution-processed fluorescent and phosphorescent binary composite white-light organic light-emitting diode device and preparation method thereof

A technology of solution processing and binary compounding, which is applied in semiconductor/solid-state device manufacturing, electrical components, electric solid-state devices, etc., can solve problems such as low color rendering index, unsuitable color temperature, and low luminous efficiency, and achieve high-efficiency luminescence Effect

Active Publication Date: 2019-11-08
CHANGZHOU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0011] In order to overcome the problems of low luminous efficiency, low color rendering index and unsuitable color temperature of existing binary composite white light organic light-emitting diodes, the purpose of the present invention is to provide a solution-processed fluorescent phosphorescent binary composite technology to obtain high-efficiency white light organic light emitting diode

Method used

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  • Solution-processed fluorescent and phosphorescent binary composite white-light organic light-emitting diode device and preparation method thereof
  • Solution-processed fluorescent and phosphorescent binary composite white-light organic light-emitting diode device and preparation method thereof
  • Solution-processed fluorescent and phosphorescent binary composite white-light organic light-emitting diode device and preparation method thereof

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Embodiment 1

[0038] Dissolve the deep blue light thermally activated delayed fluorescent material CzAcSF (commercially available) and the binuclear platinum (III) complex phosphorescent material CBZFPtCl (for the preparation method, see CN201811061723.7) in chlorobenzene respectively, and prepare a solution with a concentration of 10 mg / mL. The mass ratios of CzAcSF:CBZFPtCl were 1:0.75%, 1:1.00%, 1:1.25%, and 1:1.50% respectively to prepare mixed solutions, placed on a hot stage at 50°C and mixed evenly before use.

[0039] Before the preparation of the device, use a dust-free cloth dipped in absolute ethanol to wipe the conductive glass substrate coated with 100nm indium tin oxide (ITO), then ultrasonically treat it in isopropanol solution for 20min, acetone ultrasonically for 20min, and ITO cleaning solution ( 2%) sonication for 10 minutes, deionized water for 4 times of sonication for 10 minutes each, and isopropanol for 20 minutes, and place in an oven at 85°C for drying. After 15 min...

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Abstract

The invention discloses a solution-processed fluorescent and phosphorescent binary composite white-light organic light-emitting diode device and a preparation method thereof. A light-emitting layer inthe light-emitting diode is formed by processing a mixed solution of a thermally-activated delayed fluorescence host material and a dual-core ring metal platinum (III) complex phosphorescent guest material. Through the thermally-activated delayed fluorescence sensitized phosphorescence technology, and meanwhile, by utilizing efficient light emission and controllable Forsterer energy transfer between the host and the guest, synergistic luminescence of the wide-spectrum dual-core ring metal platinum (III) complex phosphorescent material and the blue thermally-activated delayed fluorescence material is realized, and the fluorescent and phosphorescent binary composite white-light organic light-emitting diode device with efficient luminescence and high color rendering index and color temperature is obtained. The external quantum efficiency, current efficiency and power efficiency of the device reach 11.9%, 30.8cd / A, and 21.93lm / W respectively.

Description

technical field [0001] The invention relates to a solution-processed fluorescent phosphorescence binary composite white light organic light-emitting diode and a preparation method thereof, belonging to the technical field of organic photoelectric devices. Background technique [0002] White organic light-emitting diodes (OELDs) have received extensive attention in recent years due to their potential applications in indoor lighting and displays. At present, white light devices mainly use evaporation to obtain high-efficiency white light through composite emission of binary complementary colors. [1-3] . However, there are some problems with this type of device: (1) the spectral coverage is not wide enough, and the color rendering index is low; (2) the energy transfer process is difficult to control, and the luminous efficiency of the device is reduced; (3) it is difficult to achieve large-area preparation due to high consumables. In order to solve these bottleneck problems, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K71/12H10K50/121H10K50/125H10K50/11H10K2101/10H10K71/00
Inventor 朱卫国刘邓辉吴秀刚王亚飞朱梦冰刘煜张斌
Owner CHANGZHOU UNIV
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