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A solution-processed fluorescent-phosphorescent binary composite white light organic light-emitting diode device and its preparation method

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

Active Publication Date: 2022-03-01
CHANGZHOU UNIV
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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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  • A solution-processed fluorescent-phosphorescent binary composite white light organic light-emitting diode device and its preparation method
  • A solution-processed fluorescent-phosphorescent binary composite white light organic light-emitting diode device and its preparation method
  • A solution-processed fluorescent-phosphorescent binary composite white light organic light-emitting diode device and its preparation method

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Embodiment 1

[0038] Light-emitting layer dark blue light heat activated delay fluorescent material CZACSF (commercially available) and dual-core platinum (III) Complex phosphorescent material CBZFPTCl (see CN201811061723.7), is dissolved with chlorobenzene, and the concentration of 10 mg / ml solution, According to CZACSF: CBZFPTCL mass ratio is 1: 0.75%, 1: 1.00%, 1: 1.25%, 1: 1.50%, and mixed with mixed solutions, and mixed on a hot stage at 50 ° C.

[0039] Before the preparation of the device, first use a dust-free cloth to wipe anhydrous oxide (ITO) conductive glass substrate with a dust-free cloth, and then treat 20 min, acetone is tested for 20 min, and ITO cleaning fluid ( 2%) Ultrasonic treatment 10min, deionized water for 4 ultrasound treatment EtOAc EtOAc EtOAc. Treatment of 15 min at 100 ° C, increase its surface hydrophilicity and improve the anode work function.

[0040] The device adopts a conventional preparation process, specifically: using a splitter in ITO with 3100R / min s...

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Abstract

The invention discloses a solution processing type fluorescent phosphorescence binary composite white light organic electroluminescent diode device and a preparation method thereof. The light-emitting layer in the light-emitting diode is processed by thermally activating a delayed fluorescence host material and a binuclear ring metal platinum (III) complex phosphorescence guest material mixed solution. The invention adopts thermally activated delayed fluorescence sensitized phosphorescence technology, utilizes high-efficiency luminescence and controllable Forester energy transfer between host and guest at the same time, and realizes broad-spectrum binuclear ring metal platinum (III) complex phosphorescent material and blue thermally activated delayed fluorescence The synergistic luminescence of materials has obtained a fluorescent phosphorescent binary composite white light organic electroluminescent diode with high efficiency, high color rendering index and color temperature. The external quantum efficiency, current efficiency and power efficiency of the device reached 11.9%, 30.8% respectively. cd / A and 21.93lm / W.

Description

Technical field [0001] The present invention relates to a solution processing type fluorescent phosphorescent dollar composite white-ray organic light emitting diode and a preparation method thereof, belonging to the technical field of organic optoelectronic devices. Background technique [0002] Bai Guang organic electroluminescent diode has received extensive attention due to its potential applications in indoor lighting and display in recent years. At present, the white light device mainly obtains high-efficiency white light by steaming, using binary complementary composite luminescence [1-3] . However, this type of device has some problems: (1) The spectral coverage is not wide enough, the color index is low; (2) The energy transfer process is difficult to control, the device luminous efficiency is lowered; (3) high consumables, it is difficult to achieve large area preparation. In order to crack these bottlenecks, some researchers conducted the preparation of solution proces...

Claims

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Application Information

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Patent Type & Authority Patents(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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