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Ion doping method to improve the performance of ZnO electrodes in organic solar cells

A solar cell, ion doping technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of difficult to control the proportion of doping materials, changes in doping proportion, affecting the conductivity of materials, etc., to achieve enhanced power conversion efficiency, The effect of reducing defect states and balancing collection

Inactive Publication Date: 2017-12-05
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, doping can be realized by co-evaporation method, solution mixing method, etc., but the proportion of doped materials is difficult to control. For example, the unstable evaporation rate during co-evaporation will cause the change of doping ratio, and even affect the material’s own property in severe cases. conductivity

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  • Ion doping method to improve the performance of ZnO electrodes in organic solar cells
  • Ion doping method to improve the performance of ZnO electrodes in organic solar cells

Examples

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Embodiment 1

[0020] In this example, see figure 1 and figure 2 , the solar cell structure includes a transparent conductive cathode 1, a ZnO thin film layer 4 doped with alkali metal ions, an OPV active unit 5, and a metal anode 6, a total of four parts, wherein the ZnO thin film layer 4 doped with alkali metal ions serves as a modification The role of the transparent conductive cathode 1 can significantly improve electron mobility, prevent excitons and holes from diffusing to the cathode, and at the same time modify the cathode work function, reduce the injection barrier of cathode electrons, and promote the extraction of electrons from the cathode.

[0021] The preparation process using the ion doping method of the preferred embodiment of the present invention is as follows: figure 1 As shown, spin-coat ZnO thin film on the clean and dried transparent conductive glass substrate, then vaporize LiQ to deposit alkali metal compound, perform annealing process after vapor deposition, and pr...

Embodiment 2

[0030] This embodiment is basically the same as Embodiment 1, especially in that:

[0031] In this example, the preparation of small molecule OPV, the steps are as follows:

[0032] a. This step is identical with embodiment one;

[0033] b. This step is identical with embodiment one;

[0034] c. This step is identical with embodiment one;

[0035] d. Evaporate Pentacene:C under vacuum conditions 60 Small molecule OPV active unit 5;

[0036] e. The metal anode 6 of Ag is prepared by vacuum evaporation method, so as to complete the preparation of the small molecule OPV.

[0037] The above-mentioned embodiment is for doping the alkali metal ions of the ZnO electron transport layer in the inverted OPV device. After the ion-doped layer is formed, the doping effect is verified by preparing the OPV device. The application of this method in OPV devices. For the polymer material OPV in Example 1, the active unit of OPV is mainly prepared by spin-coating method; for the small molecu...

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Abstract

The invention discloses an ion doping method for improving the performance of the zinc oxide electrode of an organic solar cell. The ion diffusion method is promoted by heating, and metal ions are doped in the ZnO thin film, which greatly increases the mobility of electrons and promotes the cathode in the solar cell. The ability to collect electrons and realize the balanced collection of electrons and holes can significantly enhance the power conversion efficiency of solar cells. The invention achieves ion doping by heating to promote the irregular movement of ions, can achieve uniform doping, effectively reduce the defect state in the ZnO film, reduce the capture of electrons and excitons by the film, and can also balance electrons and excitons at the same time. The collection of holes can improve the performance of ZnO electrodes of OPV devices and improve the power conversion efficiency of solar cells.

Description

technical field [0001] The invention relates to a method for preparing a material for a functional layer of a microelectronic device, in particular to a method for preparing a composite material for a functional layer of a microelectronic device, which is applied in the technical field of organic solar cell preparation. Background technique [0002] As an emerging science and technology, organic optoelectronic devices have gradually attracted people's attention due to their advantages such as small size, low power consumption, easy fabrication and realization on flexible substrates. The goal of the development of organic solar cells is to gradually replace the current inorganic solar cells dominated by Si, and truly become a low-cost, high-efficiency, long-life power generation battery. In the past ten years of research work, the solar power conversion efficiency under laboratory conditions can reach up to 12%. At the same time, the optimization of the device structure has m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/48H01L51/44H01L51/42
CPCH10K71/00H10K71/40H10K30/00H10K30/81Y02E10/549
Inventor 郭坤平王桃红陈长博李炜玲张静魏斌
Owner SHANGHAI UNIV