Electron injection material, preparation method thereof and application

An electron injection material, cesium salt technology, which is applied in the field of solar energy, can solve the problems of difficult preparation and low injection efficiency, and achieve the effects of lowering potential barriers, lower equipment requirements, and increased efficiency

Active Publication Date: 2012-05-23
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, an embodiment of the present invention provides an electron injection material to solve the technic

Method used

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  • Electron injection material, preparation method thereof and application
  • Electron injection material, preparation method thereof and application
  • Electron injection material, preparation method thereof and application

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preparation example Construction

[0024] The embodiment of the present invention further provides a method for preparing an electron injection material, comprising the following steps:

[0025] S01 Prepare the first solution:

[0026] preparing a first solution containing zinc oxide;

[0027] S02 Prepare the second solution:

[0028] Dissolving cesium salt in ether solution or alcohol solution to prepare a second solution;

[0029] S03: mix

[0030] mixing the first solution and the second solution at a mass ratio of zinc oxide and cesium salt of 1-6:1 to obtain a mixed solution;

[0031] S04, spin coating, high temperature treatment:

[0032] The mixed solution is spin-coated on the substrate, and kept at 100-200° C. for 10-60 minutes to obtain the electron injection material.

[0033] Specifically, in step S01, a solution containing zinc oxide can be prepared by using a well-known preparation method in the industry, preferably, dissolving zinc acetate in an alcohol solution and stirring for 1-12 hours t...

Embodiment 1

[0046] The preparation method of the solar cell containing the electron injection material of the embodiment of the present invention is as follows:

[0047] Mix ethanol and double-distilled water at a volume ratio of 3:1 to prepare a solvent;

[0048] Mix the zinc acetate powder with the above solvent to prepare a solution with a mass fraction of 1%, and then stir for 10 hours to obtain the first solution;

[0049] Will Cs 2 CO 3 mixed with ethylene glycol ether to prepare a solution with a mass fraction of 1%, and stirred for 1 hour to obtain the second solution;

[0050] The first solution and the second solution were mixed in a volume ratio of 1:1, and stirred for 60 minutes to obtain a mixed solution;

[0051] The ITO glass is subjected to photolithography treatment, cut into the required light-emitting area, and then ultrasonicated with detergent, deionized water, acetone, ethanol, and isopropanol for 15 minutes each, and then treated with oxygen plasma for 5 minutes ...

Embodiment 2

[0056] The preparation method of the electron injection material and the solar cell containing the electron injection material according to the embodiment of the present invention is as follows:

[0057] Mix isopropanol and double distilled water by volume ratio 1:1 to prepare solvent;

[0058] Mix the zinc acetate powder with the above solvent to prepare a solution with a mass fraction of 0.5%, and then stir for 12 hours to obtain the first solution;

[0059] Mix cesium azide and methyl ether to prepare a solution with a mass fraction of 0.5%, and stir for 2 hours for later use to obtain a second solution;

[0060] Mix the first solution and the second solution in a volume ratio of 1:1, and stir for 15 minutes to obtain a mixed solution;

[0061] The ITO glass is photolithographically processed, cut into the required light-emitting area, and then ultrasonicated with detergent, deionized water, acetone, ethanol, and isopropanol for 15 minutes each to remove organic pollutants...

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Abstract

The invention provides an electron injection material, a preparation method and an application, which are suitable for the technical field of solar energy. The electron injection material comprises cesium salt and zinc oxide which are mutually doped, wherein the mass ratio of the zinc oxide to the cesium salt is (1-6):1. According to the electron injection material, disclosed by the invention, the cesium salt and the zinc oxide are doped, thus the LUMO (Lowest Unoccupied Molecular Orbital) energy level of an electron injection layer is improved, the potential barriers of the electron injection material and an active layer are reduced, and the electron injection efficiency is largely increased. The preparation method disclosed by the invention has the advantages of simpleness for operation and low device requirements, and is suitable for industrial application.

Description

technical field [0001] The invention belongs to the technical field of solar energy, and in particular relates to an electron injection material and its preparation method and application. Background technique [0002] Electron injection materials are generally included in solar cells to increase the efficiency of electron transfer between the acceptor and cathode. For some commonly used electron injection materials (such as LiF) materials, the evaporation process is relatively difficult, and the thickness is difficult to control (thickness is generally controlled below 1nm), and the thickness often has a great influence on the injection efficiency of the injection layer. If the thickness is too large, it will cause the device If the series resistance of the material is too large, it is not conducive to the injection of electrons, and if the thickness is too small, an effective ohmic contact cannot be formed, which is also not conducive to the injection of electrons. At the ...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCY02E10/549
Inventor 周明杰王平黄辉陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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