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Perovskite solar cell doped with 2,2'-dipyridine and derivative thereof, and preparation method thereof

A solar cell, bipyridine technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as poor stability of perovskite solar cells, and achieve the effects of low price, easy control, and enhanced water stability

Inactive Publication Date: 2019-05-24
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the efficiency of perovskite solar cells is close to the current commercial silicon-based solar cells, the poor stability of perovskite solar cells is another factor restricting its popularization and application.

Method used

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  • Perovskite solar cell doped with 2,2'-dipyridine and derivative thereof, and preparation method thereof
  • Perovskite solar cell doped with 2,2'-dipyridine and derivative thereof, and preparation method thereof
  • Perovskite solar cell doped with 2,2'-dipyridine and derivative thereof, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1, preparation of 2,2'-bipyridine (2py) doped perovskite solar cells

[0057] According to the step of comparative example 1, only step 2) will precursor PbI 2 , NH 2 CH=NH 2 I and CsI configure Cs according to the molar ratio of 1.1:1:0.1 0.09 (NH 2 CH=NH 2 ) 0.91 PB 3 , weighed 1.5mol precursor and dissolved it in 1L of a solution with a volume ratio of γ-butyrolactone and dimethyl sulfoxide of 7:3, mixed evenly to obtain a precursor solution with a concentration of 1.5mol / L, and then added 2 , 2'-bipyridine was added to the above precursor solution until the concentration was 1 mg / ml, and filtered. The filtrate was spin-coated on the surface of the hole transport layer film, and the spin-coating speed was 4000 rpm for 30 s. Add 300 μL of chlorobenzene dropwise 10 s before the end, and finally heat on a hot plate at 100 °C for 30 min and anneal to obtain a perovskite layer doped with 2,2'-bipyridine ([(2py) 0.006 ((Cs) 0.09 (NH 2 CH=NH 2 ) 0.91 PB...

Embodiment 2

[0059] Example 2, preparation of doped 4,4'-isobutyl-2,2'-bipyridine perovskite solar cells

[0060] Following the steps of Example 1, only the doped 2,2'-bipyridine used in step 2) was replaced with 4,4'-isobutyl-2,2'-bipyridine. Add 4,4'-isobutyl-2,2'-bipyridine to the precursor solution until the concentration is 1 mg / mL.

[0061] In AM1.5, 100mW / cm 2 Test the J-V performance curve of the battery with KEITHLEY 4200 under light, such as image 3 As shown in , the short-circuit current density of the battery is 21.95mA / cm 2 , the open circuit voltage is 0.98V, the fill factor is 0.78, and the photoelectric conversion efficiency is 17.12%.

Embodiment 3

[0062] Example 3. Preparation of 5,5'-dimethyl-2,2'-bipyridine doped perovskite solar cells

[0063] Following the steps of Example 1, only the 2,2'-bipyridine used in step 2) was replaced with 5,5'-dimethyl-2,2'-bipyridine. Add 5,5'-dimethyl-2,2'-bipyridine to the precursor solution until the concentration is 1 mg / mL.

[0064] In AM1.5, 100mW / cm 2 Test the J-V performance curve of the battery with KEITHLEY 4200 under light, such as image 3 As shown in , the short-circuit current density of the battery is 21.59mA / cm 2 , the open circuit voltage is 1.03V, the fill factor is 0.74, and the photoelectric conversion efficiency is 16.80%.

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Abstract

The invention discloses a perovskite solar cell doped with 2,2'-dipyridine and a derivative thereof, and a preparation method thereof. The solar cell comprises an FTO layer, a hole transport layer, aperovskite layer, an electron transport layer, a BCP layer and an electrode which are successively stacked from bottom to top. The perovskite layer is a perovskite layer obtained by doping 2,2'-dipyridine and a derivative thereof. The material of the doped perovskite layer is [Ax((Cs)0.09(NH2CH=NH2)0.91PbI3)1-x], wherein 0<=X<=0.37, and A is 2,2'-bipyridine or a derivative thereof. Such doped material can enhance the stability of the perovskite layer and increase a fill factor and the open circuit voltage. The material is cheap, the operation method is simple and easy to control, and providesa new idea for the study of the stability and the conversion efficiency of the perovskite solar cell.

Description

technical field [0001] The invention relates to the field of perovskite solar cells, and relates to a perovskite solar cell doped with 2,2'-bipyridine and its derivatives and a preparation method thereof. Background technique [0002] Most scientists believe that the concentration of carbon dioxide in the earth's atmosphere is increasing rapidly at present, and the carbon dioxide emitted by the burning of fossil fossil fuels is the main reason for the increase in its concentration. The continuous growth of greenhouse gas emissions such as carbon dioxide will lead to global warming and global climate change. Warming will trigger a series of natural phenomena such as the redistribution of global precipitation, the melting of glaciers and permafrost, and the rise of sea levels, which will endanger the balance of natural ecosystems and the living environment of human beings. Therefore, people began to look for a new energy source as a solution to replace fossil energy sources, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCY02E10/549
Inventor 范建东李闻哲刘鹏刘锟龙毅尹航麦耀华
Owner JINAN UNIVERSITY
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