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Preparation method of cathode in-situ modified perovskite solar cell without electron transport layer

A technology of electron transport layer and solar cell, which is applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of toxic organic solvents, unfriendly environment, cumbersome steps, etc., achieve inhibition of interfacial recombination, low material cost, and simple preparation process Effect

Active Publication Date: 2020-09-25
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

This method needs to be operated in a glove box and a harsh environment, and the process is complicated and the steps are cumbersome
In addition, organic solvents are toxic, harmful to the human body, and unfriendly to the environment
[0010] FTO (fluorine-doped SnO 2 Conductive glass) electrode, low transmittance, large square resistance

Method used

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  • Preparation method of cathode in-situ modified perovskite solar cell without electron transport layer
  • Preparation method of cathode in-situ modified perovskite solar cell without electron transport layer
  • Preparation method of cathode in-situ modified perovskite solar cell without electron transport layer

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Embodiment Construction

[0060] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0061] In order to avoid the introduction of interface modification layers, additives and other substances or structures in the structure of perovskite solar cells without electron transport layers; to avoid the use of toxic and difficult-to-control organic solvents, the present invention prepares no electron transport layers based on in-situ interface modification of ionic liquids Perovskite solar cells. First of all, ionic liquids are used to replace organic solvents to prepare precursor solvents, achieving non-toxic and easy-to-control preparations. Secondly, we used ionic liquid to modify the ITO (indium tin oxide) electrode to achieve the effect of inhibiting interface recombination and matching energy levels.

[0062] Structural design of perovskite solar cells without electron transport layer:

[0063] like figure 1 As shown, the present invention adopt...

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Abstract

The invention relates to a preparation method of a cathode in-situ modified perovskite solar cell without an electron transport layer. The method comprises the following steps: firstly, replacing an organic solvent with an ionic liquid to prepare a precursor solvent to realize non-toxic and easy-to-control preparation; secondly, modifying an ITO (indium tin oxide) electrode by adopting ionic liquid to realize the effects of inhibiting interface recombination and matching an energy level; according to the method, the perovskite solar cell without the electron transport layer is prepared by adopting the ionic liquid, and the dual effects of in-situ ITO electrode modification and high-quality perovskite thin film are achieved by changing the preparation method of the perovskite thin film of the perovskite solar cell without the electron transport layer. Besides, compared with a traditional DMF (dimethylformamide) or DMSO (difluoromethyl ornithine) solvent, the precursor solution preparedfrom the ionic liquid is non-toxic, and the preparation process is simple and easy to control. Other materials and structures are not introduced, the device structure is simple, and the material costis low. The ionic liquid modifies the electrode, and the device performance is good.

Description

technical field [0001] The invention belongs to the field of solar cell preparation, and relates to a method for preparing a cathode in-situ modified perovskite solar cell without an electron transport layer. Background technique [0002] Conventional perovskite solar cells are generally composed of an electron transport layer, a hole transport layer, a perovskite active layer and electrodes, and its structure is relatively complex. This not only increases the manufacturing cost of the device, but also has relatively high requirements on the manufacturing process. In order to simplify the device structure, electron-transporting layer-free perovskite solar cells have been invented. However, in perovskite solar cells without an electron transport layer, the perovskite and electrodes are in direct contact due to the lack of an electron transport layer, which causes two problems. One is that the electrons and holes recombine at the cross-section of the electrode and the perovs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCH10K71/12H10K85/30H10K30/82H10K30/00Y02E10/549Y02P70/50
Inventor 陈永华李德力黄维武辉宋霖
Owner NORTHWESTERN POLYTECHNICAL UNIV
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