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SrCl2 doped perovskite quantum dot high-efficiency luminescent LED and preparation method thereof

A quantum dot light-emitting and perovskite technology, applied in the field of lighting, can solve the problems of poor stability and low external quantum efficiency of perovskite quantum dot LEDs, and achieve improved photoluminescence quantum yield, high external quantum efficiency, low external quantum efficiency and so on. Effect of Threshold Operating Voltage

Active Publication Date: 2019-01-22
JILIN UNIV
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Problems solved by technology

[0004] In order to solve the problems of poor stability and low external quantum efficiency of perovskite quantum dot LEDs in the prior art, the present invention proposes a SrCl 2 Doped perovskite quantum dots can significantly improve the photoluminescence quantum yield of perovskite quantum dots and the stability of perovskite quantum dots

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  • SrCl2 doped perovskite quantum dot high-efficiency luminescent LED and preparation method thereof
  • SrCl2 doped perovskite quantum dot high-efficiency luminescent LED and preparation method thereof
  • SrCl2 doped perovskite quantum dot high-efficiency luminescent LED and preparation method thereof

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Embodiment 1

[0032] The present invention adopts ITO as cathode, ZnO quantum dot film / polyethyleneimine (polyethyleneimine, PEI) double layer as electron transport layer and hole blocking layer, SrCl 2 Doped CsPbI 3 Quantum dots as the light-emitting layer, "4,4,4"-tris(carbazol-9-yl)triphenylamine (TCTA) as the hole transport layer and electron blocking layer, MoO 3 / Au is used as the anode, and the LED is prepared.

[0033] 1. Based on SrCl 2 Preparation of doped perovskite quantum dots for high-efficiency light-emitting LEDs

[0034] Materials: oleic acid (OA), 1-octadecene (ODE), oleylamine (OLA), SrCl 2 、Cs 2 CO 3 , PbI 2 , toluene, zinc acetate, ethanol, soapy water, deionized water, chloroform, acetone, isopropanol.

[0035] (1) Preparation of SrCl 2 Doped CsPbI 3 Perovskite quantum dot solution. 0.814g Cs 2 CO 3 , 2.5mL OA and 30.0mL ODE were added into a 100mL three-neck flask, degassed and dried under vacuum at 120°C for 1 hour, and then 2 The mixture was heated to 1...

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Abstract

The invention relates to a SrCl2 doped perovskite quantum dot high-efficiency luminescent LED and a preparation method thereof, belonging to the lighting technical field. ITO is used as cathode, ZnO quantum dot film / polyethyleneimine bilayer is used as electron transport layer and hole barrier layer, the thickness of ZnO quantum dot film is 40-50nm, the thickness of polyethyleneimine layer is 10-20nm, and ZnO quantum dot film / polyethyleneimine bilayer is used as electron transport layer. The SrCl 12 doped perovskite quantum dot is a luminescent layer with a thickness of 60 -75nm. 4, 4, 4-Tris(carbazol-9-yl) triphenylamine is used as a hole transport layer and an electron blocking layer with the thickness of 50-65nm. MoO3 / Au is the anode, the thickness of MoO3 is 70-100nm, and the thickness of Au is 10 -20nm. As that SrCl2 dope perovskite quantum dot of the invention is used as a light emit layer, an LED device is prepared, the performance of the device is obviously enhanced, and the device has low threshold work voltage and high external quantum efficiency.

Description

technical field [0001] The invention belongs to the technical field of lighting, in particular to a SrCl 2 Doped perovskite quantum dot high-efficiency light-emitting LED and its preparation method. Background technique [0002] LED (Light Emitting Diode) is a new type of high-efficiency light source. The wavelength of the light it emits covers infrared light, visible light and ultraviolet light, and can directly convert electrical energy into light energy. Perovskite quantum dot materials have been widely used in the field of optoelectronics due to their advantages such as high carrier mobility, high color purity, high photoelectric conversion efficiency and high photoluminescence quantum yield. The nonradiative recombination centers introduced by lead atoms on the surface of perovskite quantum dots reduce the film luminescence and limit the electroluminescent performance of perovskite LEDs. In order to solve this problem, researchers have carried out some research, and e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54H01L51/50H01L51/56B82Y30/00
CPCB82Y30/00H10K50/115H10K2102/00H10K71/00
Inventor 张宇马越陆敏于伟泳张铁强
Owner JILIN UNIV
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