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Composite film and organic light-emitting diode and manufacturing methods thereof

A technology of light-emitting diodes and composite thin films, which can be used in the manufacture of semiconductor/solid-state devices, electrical components, and electrical solid-state devices, etc., and can solve problems such as low carrier mobility and carrier transport limitations.

Inactive Publication Date: 2017-12-08
SOUTHWEST UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the carrier mobility of organic small molecule materials is small, usually about one percent or less of the carrier mobility of inorganic materials, which leads to the extremely limited carrier transport in the device.

Method used

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  • Composite film and organic light-emitting diode and manufacturing methods thereof
  • Composite film and organic light-emitting diode and manufacturing methods thereof
  • Composite film and organic light-emitting diode and manufacturing methods thereof

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Embodiment Construction

[0022] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention.

[0023] In OLEDs, an ideal hole transport layer should have suitable HOMO and LUMO energy levels, large bandgap, triplet energy, and high hole mobility. Due to the all-inorganic perovskite CsPbBr 3 The hole transport mobility is greater than 1000cm 2 V -1 the s -1 , and the HOMO energy level is not very low (5.85eV), it can be used as a good hole transport material, CsPbBr 3 The bandgap width (E g ) is estimated to be 2.38eV, which is higher than that of blue light ( ) and green light ( ) The triplet state energy of phosphorescent doping is low, but CsPbBr 3 E g Much larger than the triplet energy of red ...

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Abstract

The invention provides a composite film and an organic light-emitting diode which is based on the composite film. The composite film has double excitor blocking capability, and is composed of an all-inorganic colloidal perovskite and an organic current carrier transmission micromolecule material, wherein the all-inorganic colloidal perovskite film and the organic micromolecule material can be prepared through spin-coating, vapor deposition, ink jet printing, Knife Coating, chemical vapor deposition method and the like methods. The composite film can better block singlet excitons and triplet excitons. The composite film serves as a hole transport layer in an organic light-emitting diode, has excellent photoelectric properties, and has higher electroluminescence efficiency than devices which have traditional organic micromolecules as the hole transport layer.

Description

technical field [0001] The invention relates to the technical field of film preparation, in particular to a preparation method of an all-inorganic perovskite-organic small molecule composite film, and to an organic light-emitting diode with the composite film and a preparation method thereof. Background technique [0002] Due to their unique optoelectronic properties, low-cost and solution-processable halide perovskites have been widely used as light-emitting layers in light-emitting diodes (LEDs), light-absorbing layers in solar cells (SCs), and gain media in detectors and lasers. Halide perovskites have the typical chemical formula ABX 3 , where the A, B and X moieties can be replaced by various elements (A=CH 3 NH 3 + , NH 2 CHNH 2 + 、Cs + , Li + 、Na + 、K + , Rb + ···B=Pb 2+ ,Zn 2+ 、 Ge 2+ , Sn 2+ ···X=F - , Cl - 、Br - , I - ,···), which exhibit color tunability over the entire visible range, high color purity insensitive to particle size (full width at...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/56
CPCH10K50/18H10K71/00
Inventor 高春红张月马兴娟玉福星熊自阳贾亚兰
Owner SOUTHWEST UNIVERSITY
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