CN116113296A - Perovskite solar cell and preparation method thereof - Google Patents
Perovskite solar cell and preparation method thereof Download PDFInfo
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- CN116113296A CN116113296A CN202310323677.8A CN202310323677A CN116113296A CN 116113296 A CN116113296 A CN 116113296A CN 202310323677 A CN202310323677 A CN 202310323677A CN 116113296 A CN116113296 A CN 116113296A
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Abstract
The invention provides a perovskite solar cell and a preparation method thereof, wherein the perovskite solar cell comprises a substrate, a nickel oxide hole transport layer, a polypyrrole modification layer, a perovskite absorption layer, an electron transport layer and an electrode which are sequentially arranged; the thickness of the polypyrrole modification layer is 1-5 nm. According to the invention, the nickel oxide layer is modified on the nickel oxide hole transport layer, so that on one hand, direct contact between nickel oxide and the perovskite layer can be isolated, damage of nickel oxide to perovskite is avoided, on the other hand, polypyrrole has a good carrier transport effect, loss of interfacial charge can be effectively avoided, nitrogen heteroatoms in the polypyrrole and divalent metal cations in the perovskite layer have good coordination effect, the crystallization quality of the perovskite film can be improved, and further the photoelectric conversion efficiency of the battery is improved.
Description
Technical Field
The invention belongs to the technical field of solar cells, and particularly relates to a perovskite solar cell and a preparation method thereof.
Background
The nickel oxide is used as a hole transport layer material commonly used in trans-perovskite solar cells, and has the advantages of stability, low cost and easiness in preparation. However, the highly active oxidation state of nickel oxide surfaces such as Ni 4+ The perovskite layer can be corroded, so that the perovskite structure collapses, and the photoelectric conversion efficiency and stability of the device are affected.
Disclosure of Invention
In view of the above, the present invention aims to provide a perovskite solar cell and a preparation method thereof, wherein the perovskite solar cell has the advantage that the photoelectric conversion efficiency of the cell is improved by modifying nickel oxide with polypyrrole.
The invention provides a perovskite solar cell, which comprises a substrate, a nickel oxide hole transport layer, a polypyrrole modification layer, a perovskite absorption layer, an electron transport layer and an electrode which are sequentially arranged;
the thickness of the polypyrrole modification layer is 1-5 nm.
In the invention, the polypyrrole modification layer is prepared by an electrochemical deposition mode of pyrrole monomers.
In the invention, the perovskite absorption layer is halide perovskite, and the crystal structure is ABX 3 The A is an organic cation and/or an inorganic cation, and the B is a divalent metal ion; and X is halogen ion.
In the present invention, the divalent metal ion is Pb 2+ Or Sn (Sn) 2+ ；
The halogen ion is selected from I-, br-, or Cl-.
In the present invention, the material of the electron transport layer is selected from C60, PCBM or tin dioxide.
In the present invention, the electrode is selected from one or more of a metal electrode, a conductive oxide transparent electrode, a carbon electrode, and a graphite electrode.
The invention provides a preparation method of the perovskite solar cell, which comprises the following steps:
preparing a nickel oxide hole transport layer on a substrate;
depositing a polypyrrole modification layer on the nickel oxide by adopting an electrochemical method;
and sequentially preparing a perovskite absorption layer, an electron transmission layer and an electrode on the polypyrrole modification layer to obtain the perovskite solar cell.
In the invention, the electrochemical method deposition method can effectively control the thickness of the polypyrrole modification layer, and has good regulation effect on the performance of battery devices. The electrochemical method of depositing a polypyrrole modification layer on nickel oxide includes:
mixing sodium dodecyl benzene sulfonate solution and pyrrole monomer as electrolyte, adopting a three-electrode system to deposit, adopting metal platinum as a counter electrode, adopting Ag/AgCl as a reference electrode, adopting a substrate with a nickel oxide transmission layer as a working electrode, adopting cyclic voltammetry to deposit, and drying after the deposition is finished, wherein the voltage is 0.5-2V.
In the invention, the concentration of the sodium dodecyl benzene sulfonate solution is 0.05-0.5 mol/L, and the concentration of the pyrrole monomer is 0.1-2 mol/L. And after the deposition of the polypyrrole modified layer is finished, the drying temperature is 60 ℃, and the drying time is 1-5 h.
In the present invention, the perovskite absorber layer is prepared by spin coating, knife coating or slot coating.
The invention provides a perovskite solar cell, which comprises a substrate, a nickel oxide hole transport layer, a polypyrrole modification layer, a perovskite absorption layer, an electron transport layer and an electrode which are sequentially arranged; the thickness of the polypyrrole modification layer is 1-5 nm. According to the invention, the nickel oxide layer is modified on the nickel oxide hole transport layer, so that on one hand, direct contact between nickel oxide and the perovskite layer can be isolated, damage of nickel oxide to perovskite is avoided, on the other hand, polypyrrole has a good carrier transport effect, loss of interfacial charge can be effectively avoided, nitrogen heteroatoms in the polypyrrole and divalent metal cations in the perovskite layer have good coordination effect, the crystallization quality of the perovskite film can be improved, and further the photoelectric conversion efficiency of the battery is improved.
Drawings
Fig. 1 is a graph showing the photoelectric conversion efficiency of the solar cell prepared in example 1 of the present invention;
fig. 2 is a graph showing the photoelectric conversion efficiency of the solar cell prepared in example 2 of the present invention;
fig. 3 is a graph showing photoelectric conversion efficiency of the solar cell manufactured in comparative example 1 of the present invention;
fig. 4 is a graph showing photoelectric conversion efficiency of the solar cell manufactured in comparative example 2 of the present invention.
Detailed Description
In order to further illustrate the present invention, a perovskite solar cell and a method for manufacturing the same according to the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The FTO glass substrate is cleaned by acetone, isopropanol and deionized water in sequence, and is treated by ultraviolet-ozone for 20 minutes after being dried. And (3) depositing a nickel oxide hole transport layer on the substrate by utilizing magnetron sputtering, wherein the vacuum pressure is 0.37Pa, the power is 90W, and the deposition time is 10 minutes. Dissolving sodium dodecyl benzene sulfonate into deionized water with the concentration of 0.1mol/L, adding pyrrole monomer into the solution with the concentration of 0.1mol/L, and preparing the electrodeposition solution. The method comprises the steps of adopting a three-electrode system to deposit polypyrrole, adopting metal platinum as a counter electrode, adopting Ag/AgCl as a reference electrode, adopting a substrate with a nickel oxide transmission layer as a working electrode, adopting a cyclic voltammetry to deposit, adopting the voltage of 0.5-2V, and after 20 cycles, removing the materials, flushing the materials with deionized water, and drying the materials at 60 ℃ for 5 hours. Preparation of FAPbI in a Nitrogen glove box 3 Perovskite precursor solution (solute in perovskite precursor solution is FAI, pbI 2 And MACl, pbI 2 Molar ratio to FAI is 1:1, MACl and PbI 2 The molar ratio of (2) is 0.35: 1) The concentration is 1.4mol/L, and the volume ratio of the solvent is 91 DMF and DMSO mixtures. 50 microliters of the perovskite precursor solution was dropped on the substrate, spin-coated at 5000rpm for 15s, and 150 microliters of anhydrous diethyl ether was added dropwise at 10s, and annealed at 150℃for 20 minutes. Finally, preparing a C60 with the thickness of 20nm, a 2, 9-dimethyl-4, 7-biphenyl-1, 10-phenanthroline (BCP) buffer layer with the thickness of 5nm and a copper electrode with the thickness of 150nm in sequence by a vacuum evaporation method.
In the perovskite solar cell prepared in the embodiment 1 of the invention, the nickel oxide charge transport layer is 30nm, the polypyrrole is 2nm, the perovskite layer is 400nm, the C60 is 20nm, and the copper electrode is 150nm.
Example 2
The difference from example 1 is that the polypyrrole-modified layer has a thickness of 5nm.
Comparative example 1
The difference from example 1 is that the polypyrrole-modified layer has a thickness of 10nm.
Comparative example 2
The difference from example 1 is that no polypyrrole-modifying layer was provided.
And (3) performance detection:
at room temperature, using a 3A solar simulator at 100mW/cm 2 The photoelectric conversion efficiency of the cells prepared in examples and comparative examples was measured under light intensity, and the effective area of the cell was 0.09cm 2 。
As shown in FIGS. 1 to 4, FIG. 1 shows that the battery prepared in example 1 has a short-circuit current density of 24.67mA/cm 2 Open circuit voltage 1.116V, fill factor 82.15%, photoelectric conversion efficiency 22.61%;
FIG. 2 shows that the short-circuit current density of the battery prepared in example 2 was 25.44mA/cm 2 Open circuit voltage 1.134V, filling factor 78.94% and photoelectric conversion efficiency 22.78%;
as can be seen from FIG. 3, the battery prepared in comparative example 1 had a short-circuit current density of 24.25mA/cm 2 Open circuit voltage 1.033V, fill factor 80.56% and photoelectric conversion efficiency 20.21%;
as can be seen from FIG. 4, the battery prepared in comparative example 2 has a short-circuit current density of 24.68mA/cm 2 Open circuit voltage 1.085V, fill factor 81.83%, lightThe electrical conversion efficiency was 21.93%.
From the above embodiments, the present invention provides a perovskite solar cell, including a substrate, a nickel oxide hole transport layer, a polypyrrole modification layer, a perovskite absorption layer, an electron transport layer, and an electrode, which are sequentially disposed; the thickness of the polypyrrole modification layer is 1-5 nm. According to the invention, the nickel oxide layer is modified on the nickel oxide hole transport layer, so that on one hand, direct contact between nickel oxide and the perovskite layer can be isolated, damage of nickel oxide to perovskite is avoided, on the other hand, polypyrrole has a good carrier transport effect, loss of interfacial charge can be effectively avoided, nitrogen heteroatoms in the polypyrrole and divalent metal cations in the perovskite layer have good coordination effect, the crystallization quality of the perovskite film can be improved, and further the photoelectric conversion efficiency of the battery is improved.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. A perovskite solar cell comprises a substrate, a nickel oxide hole transport layer, a polypyrrole modification layer, a perovskite absorption layer, an electron transport layer and an electrode which are sequentially arranged;
the thickness of the polypyrrole modification layer is 1-5 nm.
2. The perovskite solar cell of claim 1, wherein the polypyrrole modification layer is made by electrochemical deposition of pyrrole monomers.
3. The perovskite solar cell of claim 1, wherein the perovskite absorber layer is a halide perovskite having a crystal structure ABX 3 The A is an organic cation and/or an inorganic cation, and the B is a divalent metal ion; and X is halogen ion.
4. A perovskite solar cell according to claim 3, wherein the divalent metal ion is Pb 2+ Or Sn (Sn) 2+ ；
The halogen ion is selected from I - 、Br - Or Cl-.
5. The perovskite solar cell according to claim 1, wherein the material of the electron transport layer is selected from C60, PCBM or tin dioxide.
6. A method of manufacturing a perovskite solar cell as claimed in any one of claims 1 to 5, comprising the steps of:
preparing a nickel oxide hole transport layer on a substrate;
depositing a polypyrrole modification layer on the nickel oxide by adopting an electrochemical method;
and sequentially preparing a perovskite absorption layer, an electron transmission layer and an electrode on the polypyrrole modification layer to obtain the perovskite solar cell.
7. The method of claim 6, wherein electrochemically depositing the polypyrrole modification layer on the nickel oxide comprises:
mixing sodium dodecyl benzene sulfonate solution and pyrrole monomer as electrolyte, adopting a three-electrode system to deposit, adopting metal platinum as a counter electrode, adopting Ag/AgCl as a reference electrode, adopting a substrate with a nickel oxide transmission layer as a working electrode, adopting cyclic voltammetry to deposit, and drying after the deposition is finished, wherein the voltage is 0.5-2V.
8. The method according to claim 6, wherein the concentration of the sodium dodecylbenzenesulfonate solution in the electrolyte is 0.05 to 0.5mol/L and the concentration of the pyrrole monomer is 0.1 to 2mol/L.
9. The method of claim 6, wherein the perovskite absorber layer is prepared by spin coating, knife coating, or slot coating.
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| CN116669449A (en) * | 2023-08-02 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Perovskite solar cell, preparation method thereof and electric equipment |
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Cited By (1)
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| CN116669449A (en) * | 2023-08-02 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Perovskite solar cell, preparation method thereof and electric equipment |
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