Preparation method of perovskite solar cell with perovskite layer passivated by nanofibers

A technology of solar cells and nanofibers, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low efficiency and poor stability of perovskite cells, and achieve improved photoelectric conversion efficiency, improved performance, and controllable dimensions Effect

Pending Publication Date: 2021-06-22
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing solar cells with nanofiber passivation perovskite layer. For current perovskite solar cells, there are still poor water and oxygen stability, which leads to low efficiency of perovskite cells. The problem is that nan

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  • Preparation method of perovskite solar cell with perovskite layer passivated by nanofibers
  • Preparation method of perovskite solar cell with perovskite layer passivated by nanofibers
  • Preparation method of perovskite solar cell with perovskite layer passivated by nanofibers

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[0022] Example 1:

[0023] First, the nanofibers are processed by the mass fraction of 10% by weight of polyacrylonitrile / N, N-dimethylformamide solution processed by electrostatic spinning technology to polymer nanofibers, and the electrospinning parameters are as follows: 1 nozzle and negative high pressure generator Connection, the negative high voltage value is -5 kV; 2 between the nozzle and the receiving plate is 15cm; 3 The receiving plate is connected to the positive high voltage generator, the positive high pressure is + 10 kV; 4 The feed speed is controlled by the pump, the feed speed is 1.0 Ml · h -1 To obtain polymer nanofibers. Then, the polymer nanofibers were held at 240 ° C for 60 minutes under the air atmosphere, and the nitrogen gas was attached to 800 ° C, and the temperature was held in a nitrogen atmosphere for 60 minutes, cooling, and finally nanofibers were obtained. Among them, the rate of temperature and cooling is 5 ° C per minute.

[0024] Next: (1) Co...

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Abstract

The invention provides a preparation method of a solar cell using nanofibers as a perovskite layer passivation material. The perovskite solar cell comprises a transparent conductive layer, an electron transport layer, a perovskite photosensitive layer, a hole transport layer and a metal electrode layer, and is characterized in that the perovskite layer passivation material is nanofibers, and the nanofibers are prepared by an electrostatic spinning technology. The invention further provides the preparation method of the perovskite solar cell with the perovskite layer passivated by the nanofibers, the perovskite layer is prepared by adopting a method of spin-coating a mixed solution of the perovskite and the nanofibers, wherein the nanofibers can generate strong complexing and coordination effects with lead ions in the perovskite layer, so that electronic defects at crystal boundaries are filled up, and nucleation sites are provided for crystallization of perovskite to induce crystallization, and the energy conversion efficiency of the prepared perovskite cell reaches 20.3%.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, and in particular relates to a perovskite solar cell with a perovskite layer passivated by nanofibers and a preparation method thereof. Background technique [0002] Solar cells prepared with perovskite materials as the photosensitive layer have become a research hotspot in the third generation of photovoltaic technology due to their low cost and high energy conversion efficiency. Since 2009, the energy conversion efficiency of a single-junction perovskite solar cell has rapidly increased from 3.8% to 25.5%. Compared with other traditional solar cells, perovskite solar cells are more susceptible to moisture, oxygen, temperature, light and other factors, and perovskite solar cells are prone to ion migration under light, which greatly reduces the battery life. environmental stability. The most important reason for limiting the stability of perovskite solar cells is that the surface...

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCH10K71/12H10K30/15H10K30/88H10K2102/00Y02E10/549
Inventor 刘勇许志阳谭占鳌
Owner BEIJING UNIV OF CHEM TECH
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