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ACI type two-dimensional perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar photovoltaic, can solve the problems of restricting the industrialization of photovoltaic devices, irregular crystal orientation, low carrier mobility, etc.

Active Publication Date: 2019-11-29
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optical and thermal stability of traditional three-dimensional perovskite restricts the industrialization of photovoltaic devices
Compared with three-dimensional perovskite solar cells, two-dimensional perovskite solar cells have better stability, among which alternating cation type (ACI) two-dimensional metal halide perovskite materials have shown great potential in the field of photovoltaics, however, the The low carrier mobility, irregular crystal orientation, and high defect state density of the two-dimensional perovskite film in the battery lead to low device efficiency, which seriously restricts its industrialization process.

Method used

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  • ACI type two-dimensional perovskite solar cell and preparation method thereof
  • ACI type two-dimensional perovskite solar cell and preparation method thereof
  • ACI type two-dimensional perovskite solar cell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] (1) Preparation of perovskite precursor solution: mix PbI according to the molar ratio of 3:1:3:0.37 2 , C(NH 2 ) 3 I. CH 3 NH 3 I and CH 3 NH 3 Cl is used as the solute, and DMSO and DMF are mixed as the solvent according to the volume ratio of 1:10 to prepare a perovskite precursor solution with a concentration of 1.2M, wherein the solute contains CH 3 NH 3 The concentration of Cl in the perovskite precursor solution was 10 mg / mL.

[0051] (2) Clean the FTO glass substrate, select an area of ​​2.5*2.5cm 2 The FTO conductive glass used as the substrate was ultrasonically cleaned with acetone, isopropanol, ethanol, and ultrapure water for 30 minutes, then dried with a nitrogen gun, and treated with ultraviolet ozone for 15 minutes to prepare the FTO substrate.

[0052] (3) Preparation of dense TiO 2 electron transport layer

[0053] TiCl 4 Solution by volume TiCl 4 :H 2 O=0.0225:1 is added dropwise to the ice-water mixture to ensure that the reaction temper...

Embodiment 2

[0063] In step (4), the annealing condition of the perovskite thin film is: slowly raising the temperature from 40° C. to 100° C., and finally annealing at 100° C. for 10 minutes; other steps are the same as in Example 1.

Embodiment 3

[0065] In step (4), the annealing conditions of the perovskite thin film are: the temperature is 100° C., and the time is 10 minutes; other steps are the same as in Example 1.

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Abstract

The invention discloses an ACI type two-dimensional perovskite solar cell and a preparation method thereof. The perovskite absorption layer of the solar cell is a mixture of C(NH2)3I, CH3NH3I and PbI2. In the preparation process, CH3NH3Cl is added to serve as an additive. Compared with the conventional two-dimensional perovskite device, the addition of CH3NH3Cl greatly improves the crystallizationquality of the perovskite thin film, increases the grain size, reduces the carrier recombination loss caused by defects at the grain boundary, and prolongs the carrier service life. Meanwhile, effective gradient distribution of different n values is increased, the charge transmission efficiency is improved, the improvement of the photoelectric conversion efficiency of the perovskite battery device is finally directly determined, the series-parallel resistance of the device is improved, and the photoelectric conversion efficiency of 18.48% is finally obtained. The excellent photoelectric properties and device efficiency of the perovskite solar cell are helpful for promoting the commercial application of the perovskite solar cell.

Description

【Technical field】 [0001] The invention belongs to the technical field of solar photovoltaics, and in particular relates to an ACI type two-dimensional perovskite solar cell and a preparation method thereof. 【Background technique】 [0002] In recent years, organic-inorganic hybrid perovskite solar cells have attracted widespread attention due to their excellent photoelectric performance, and the photoelectric conversion efficiency has increased rapidly from 3.8% in 2009 to 25.2% at present. However, the optical and thermal stability of traditional three-dimensional perovskite restricts the industrialization of photovoltaic devices. Compared with three-dimensional perovskite solar cells, two-dimensional perovskite solar cells have better stability, among which alternating cation type (ACI) two-dimensional metal halide perovskite materials have shown great potential in the field of photovoltaics, however, the The low carrier mobility, irregular crystal orientation, and high de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48H01L51/00H10K99/00
CPCH10K71/12H10K71/15H10K71/40H10K85/00H10K30/151H10K30/10Y02E10/549Y02P70/50
Inventor 赵奎刘生忠罗涛张亚兰
Owner SHAANXI NORMAL UNIV
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