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Leadless perovskite quantum dot and flexible light emitting diode preparation method

A technology of light-emitting diodes and lead-free perovskites, which can be used in semiconductor/solid-state device manufacturing, electrical components, circuits, etc., and can solve problems such as not being green and environmentally friendly

Inactive Publication Date: 2018-03-09
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0004] However, most of the current all-inorganic perovskite quantum dots use lead-containing halides as raw materials, which are not environmentally friendly.

Method used

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Embodiment Construction

[0016] The invention provides a method for preparing lead-free perovskite quantum dots and flexible light-emitting diodes, comprising the following steps:

[0017] (1) Prepare cesium oleate precursor;

[0018] (2) Inject the cesium oleate precursor obtained in step (1) to produce Cs 2 SnI 6 quantum dots;

[0019] (3) Cs 2 SnI 6 The quantum dot solution is mixed with the surface tension regulator 1,2-dichlorobenzene in a volume ratio (5~10): 1 to prepare Cs 2 SnI 6 Quantum dot ink;

[0020] (4) The PEDOT:PSS organic solution was evenly deposited on the substrate ITO surface by spin coating, the Poly-TPD organic solution was deposited on the deposited PEDOT:PSS film surface by spin coating, and the Cs 2 SnI 6 The quantum dot ink is uniformly deposited on the surface of the deposited Poly-TPD film by inkjet printing, the configured ZnO ink is uniformly deposited on the surface of the deposited quantum dot film by inkjet printing, and Al is deposited on the deposited film ...

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Abstract

The invention provides a leadless perovskite quantum dot and flexible light emitting diode preparation method comprising the following steps: preparing an oleic acid caesium precursor; prepaing Cs2SnI6 quantum dots; preparing a Cs2SnI6 quantum dot ink; and preparing a Cs2SnI6 quantum dot flexible light emitting diode. A step by step synthesis method, the ink-jet printing technology, the vapor plating technology and the spin coating technology are combined so as to prepare the leadless perovskite quantum dot and flexible light emitting diode.

Description

technical field [0001] The invention relates to the technical field of light-emitting diodes, in particular to a lead-free perovskite quantum dot and a preparation method for a flexible light-emitting diode. Background technique [0002] All-inorganic perovskite quantum dots have excellent photoelectric properties, which belong to inorganic semiconductor materials, and have more stable photochemical stability than organic materials, and can realize the regulation of fluorescence wavelength and emission spectrum by adjusting the size of quantum dots, with excellent Fluorescence quantum yield. Due to their excellent properties, quantum dots have attracted widespread attention and are widely used in the field of display technology. [0003] Quantum dot light-emitting diode (QLED) is a quantum dot organic light-emitting device that uses quantum dots as the light-emitting layer and can generate and emit light of any visible wavelength. Quantum dot light-emitting diodes have man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/56
CPCH10K50/115H10K2102/00H10K71/00
Inventor 李凤纪丽珊张虚谷蒋杰王凛烽李龙翔
Owner NANCHANG HANGKONG UNIVERSITY
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