CN112993165A - Biocompatible perovskite battery component, precursor liquid and preparation method thereof - Google Patents

Biocompatible perovskite battery component, precursor liquid and preparation method thereof Download PDF

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CN112993165A
CN112993165A CN202110158738.0A CN202110158738A CN112993165A CN 112993165 A CN112993165 A CN 112993165A CN 202110158738 A CN202110158738 A CN 202110158738A CN 112993165 A CN112993165 A CN 112993165A
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perovskite
transport layer
thymine
biocompatible
battery component
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陈加坡
赵亚楠
朱桂
白华
范斌
田清勇
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Kunshan GCL photoelectric materials Co.,Ltd.
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Suzhou Gcl Nanometer Technology Co ltd
Kunshan Gcl Photoelectric Materials Co ltd
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    • H—ELECTRICITY
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    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E10/549—Organic PV cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

The invention provides a biocompatible perovskite battery component, precursor liquid and a preparation method thereof, which comprises the following steps of S1, preparing an electron transmission layer on substrate glass in a spin coating mode; s2 dissolving thymine in a perovskite precursor solution, wherein the concentration of the perovskite precursor solution is 0.8-1.5mol/L, and the concentration of the thymine is 0.5 mg/mL; coating the perovskite on the electron transport layer in a spin coating and vacuum flash evaporation mode, and annealing to obtain a perovskite thin film; the thymine effectively passivates Pb2+ defects in perovskite lattices, reduces the defect state density of the film, improves the Voc (open circuit voltage) and FF (fill factor) of a device, further improves the energy conversion efficiency and other photoelectric properties of the perovskite solar cell, and the added thymine does not influence the structure and the properties of the initial perovskite film.

Description

Biocompatible perovskite battery component, precursor liquid and preparation method thereof
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a biocompatible perovskite battery component, a precursor liquid and a preparation method thereof.
Background
Perovskite is a promising photovoltaic material of the next generation due to its excellent photoelectric characteristics of adjustable band gap, high light absorption coefficient, long carrier diffusion distance and the like. However, for perovskite solar cells, the inherent defects of perovskite polycrystalline thin films, inevitable grain boundaries, seriously hinder the commercial development thereof. In particular, a large number of compositional and structural defects such as halogen anion vacancies, cation vacancies, interstitial iodine and Pb-I inversion defects are found in the perovskite thin film during annealing, accompanied by evaporation of the organic halide and migration of I- (iodide ions), which greatly reduces the optoelectronic properties of the device. Thus, effective additives have been developed to achieve high quality perovskite films, such as caffeine, theophylline, 2-hydroxyethyl acrylate, and the like, which are widely used to bind uncomplexed Pb in the perovskite lattice2+Further, the defect state density of the film is reduced, the extraction and the transportation of current carriers are promoted, the non-radiative recombination induced by defects is inhibited, and the perovskite solar cell with higher efficiency is realized. However, the existing additives are expensive or toxic and are not suitable for mass production.
Disclosure of Invention
In order to solve the technical problem, the invention provides a preparation method of a biocompatible perovskite battery component,
s1, taking substrate glass, and preparing an electron transport layer on the substrate glass in a spin coating mode;
s2 dissolving thymine in a perovskite precursor solution, wherein the concentration of the perovskite precursor solution is 0.8-1.5mol/L, and the concentration of the thymine is 0.5 mg/mL; coating the perovskite on the electron transport layer in a spin coating and vacuum flash evaporation mode, and annealing to obtain a perovskite thin film;
s4: preparing a hole transport layer on the perovskite thin film in a spin coating mode;
s5: and preparing an electrode on the hole transport layer by a vacuum evaporation or vacuum sputtering method.
Preferably, the perovskite is MA0.25FA0.75PbI2.92Br0.08。
Preferably, the perovskite precursor solution is prepared by dissolving perovskite in a mixed solvent of DMF and NMP.
Preferably, the mixing ratio of DMF and NMP is 8-10: 1
The perovskite battery component comprises a glass substrate layer, an electron transport layer, a perovskite layer, a hole transport layer and electrodes which are sequentially arranged, wherein thymine is contained in the perovskite layer.
Preferably, the electron transport layer is SnO2And the thickness is about 28nm +/-3 nm.
Preferably, the hole transport layer is a Spiro-OMeTAD and has a thickness of about 100 nm.
A biocompatible perovskite precursor solution comprises a perovskite solution, wherein gonadal pyrimidine is mixed in the perovskite solution, and the concentration of thymine is 0.5 mg/mL.
The preparation method of the biocompatible perovskite battery component and the perovskite battery component provided by the invention have the following beneficial effects: thymidine effectively passivates Pb present in the perovskite lattice2+And the defect state density of the film is reduced, the Voc (open circuit voltage) and FF (fill factor) of the device are improved, the photoelectric properties such as energy conversion efficiency of the perovskite solar cell are further improved, and the structure and the performance of the initial perovskite film are not influenced by the added thymine.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic view of the J-V test of the present invention before and after passivation;
FIG. 2 is a photoluminescence spectrum (PL) of a perovskite thin film of the present invention before and after passivation;
FIG. 3 is a schematic structural view of a battery pack according to the present invention;
wherein, 1, a glass substrate layer; 2. an electron transport layer; 3. a perovskite layer; 4. a hole transport layer; 5. and an electrode.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
In order to solve the technical problem, the invention provides a preparation method of a biocompatible perovskite battery component,
s1, taking substrate glass, and preparing an electron transport layer 2 on the substrate glass in a spin coating mode;
s2: dissolving thymine in a perovskite precursor solution (perovskite is dissolved in a mixed solvent of DMF and NMP), wherein the perovskite precursor solution is 0.8-1.5mol/L, and the concentration of thymine is 0.5 mg/mL; coating the perovskite on the electron transport layer in a spin coating and vacuum flash evaporation mode, and annealing to obtain a perovskite thin film;
s4: preparing a hole transport layer 4 on the perovskite thin film in a spin coating mode;
s5: the electrode 5 is prepared on the hole transport layer 4 by a vacuum evaporation or vacuum sputtering method.
Preferably, the mixing ratio of DMF and NMP is 8-10, and in the embodiment, 9:1 is selected
The perovskite battery component prepared by the method comprises a glass substrate layer 1, an electron transport layer 2, a perovskite layer 3, a hole transport layer 4 and an electrode 5 which are sequentially arranged, wherein the electron transport layer 2 is SnO2A thickness of about 28nm + -3 nm, wherein the hole transport layer 4 is a Spiro-OMeTAD, a thickness of about 100nm,the electrode 5 is Au and has a thickness of 85 nm. The conductive substrate is FTO conductive glass, and the thickness of the FTO is about 500 nm; the electron transport layer 2 is SnO2The thickness is about 28nm +/-3 nm; perovskite MA0.25FA0.75PbI2.92Br0.08(MA has the structural formula CH3NH3 +FA has the formula CH (NH)2)2 +) And the thickness is 400 nm.
The ratio of DMF to NMP in example 1 was likewise changed to 8:1, and the remaining conditions and procedures were unchanged as in example 2.
Example 3 was prepared by varying the ratio of DMF to NMP in example 1 to 9:1, with the conditions and procedures unchanged.
Comparative example 4
S1, taking substrate glass, and preparing an electron transport layer 2 on the substrate glass in a spin coating mode;
s2: dissolving perovskite in a mixed solution of DMF and NMP, wherein the concentration of the perovskite is 1 mol/L; coating the perovskite on the electron transmission layer 2 in a spin coating and air draft mode, and forming a film after annealing;
s4: preparing a hole transport layer 4 on the perovskite layer 3 by a spin coating method;
s5: the electrode 5 is prepared on the hole transport layer 4 by a vacuum evaporation or vacuum sputtering method.
Preferably, the mixing ratio of DMF and NMP is 8-10: 1, and in the embodiment, 9:1 is selected
A perovskite component of conventional structure was prepared by example 4.
The perovskite frame members of examples 1 to 4 described above were subjected to J-V tests, and the results of examples 1 to 3 were similar and compared as one result among the results. Detailed description of the drawings fig. 1
The contrast effect of the device with the upright structure is shown in fig. 1, and the device structures of the two are shown in the figure. Under the condition that short-circuit currents are similar, the voltage and FF of the thymine modified device (embodiment 1-3) are respectively improved by 0.02V and 5.5%, and the efficiency is also improved by 7.3%. The voltage and FF are improved mainly due to the reduction of the number of defects in the perovskite thin film, and the reduction of ineffective recombination of current carriers in the interior of the perovskite.
The photoluminescence spectra (PL) of the perovskite thin film before and after modification are shown in fig. 2. PL intensity is related to the number of defects inherent in the film that act as nonradiative recombination centers for carriers, quenching the PL. The passivated film had a higher PL intensity, indicating a low number of internal defects in the thymine treated perovskite film.
Thymine has the molecular formula of
Figure BDA0002934825890000041
The strong Lewis acid-base action force between C-O functional group and Pb can be used to passivate unbound and incompatible Pb in perovskite by using C-O bond in thymine2+A site. Thereby reducing the defect state density of the perovskite thin film, promoting the extraction and transportation of current carriers and promoting the improvement of the efficiency of the perovskite solar cell.
Therefore, thymine is added into the perovskite precursor solution as an effective passivator to passivate the defects of the perovskite thin film and improve the Voc, FF and efficiency of the device. Proper amount of thymine is added into the perovskite precursor solution to passivate Pb defects in the perovskite film and reduce the defect state density of the film. And the added thymine additive does not influence the structure and the performance of the initial perovskite thin film. The method has the advantages of simple process, strong repeatability and reproducibility of experimental data and low cost.
Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A method for preparing a biocompatible perovskite battery component is characterized in that,
s1, taking substrate glass, and preparing an electron transport layer on the substrate glass in a spin coating mode;
s2: dissolving thymine in a perovskite precursor solution, wherein the concentration of the perovskite precursor solution is 0.8-1.5mol/L, and the concentration of the thymine is 0.5 mg/mL; coating the perovskite on the electron transport layer in a spin coating and vacuum flash evaporation mode, and annealing to obtain a perovskite thin film;
s4: preparing a hole transport layer on the perovskite thin film in a spin coating mode;
s5: and preparing an electrode on the hole transport layer by a vacuum evaporation or vacuum sputtering method.
2. The method of making a biocompatible perovskite battery component as claimed in claim 1, wherein the perovskite is MA0.25FA0.75PbI2.92Br0.08。
3. The method of making a biocompatible perovskite battery component as claimed in claim 1, wherein the perovskite precursor solution is prepared by dissolving a perovskite in a mixed solvent of DMF and NMP.
4. The method for preparing a biocompatible perovskite battery component according to claim 3, wherein the mixing ratio of DMF and NMP is 8-10: 1.
5. The perovskite battery component is characterized by comprising a glass substrate layer, an electron transport layer, a perovskite layer, a hole transport layer and an electrode which are sequentially arranged, wherein thymine is contained in the perovskite layer.
6. The perovskite cell assembly of claim 5, wherein the electron transport layer is SnO2And the thickness is about 28nm +/-3 nm.
7. The perovskite cell assembly of claim 5, wherein the hole transport layer is Spiro-OMeTAD and has a thickness of about 100 nm.
8. A biocompatible perovskite precursor solution is characterized by comprising a perovskite solution, wherein gonadal pyrimidine is mixed in the perovskite solution, and the concentration of thymine is 0.5 mg/mL.
CN202110158738.0A 2021-02-04 2021-02-04 Biocompatible perovskite battery component, precursor liquid and preparation method thereof Pending CN112993165A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108493343A (en) * 2018-04-04 2018-09-04 清华大学 The application of a kind of perovskite thin film and preparation method thereof and the film in the opto-electronic device
CN109216555A (en) * 2018-08-27 2019-01-15 电子科技大学 Perovskite-type compounds layer and battery and preparation method thereof
CN110635039A (en) * 2019-08-21 2019-12-31 厦门大学 Method for passivating perovskite and perovskite solar cell
CN110817942A (en) * 2019-11-13 2020-02-21 中国工程物理研究院化工材料研究所 Preparation method of all-inorganic perovskite precursor and battery prepared based on all-inorganic perovskite precursor
CN111430554A (en) * 2020-03-25 2020-07-17 杭州纤纳光电科技有限公司 Preparation method of perovskite thin film added with triiodide, preparation method of battery and battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108493343A (en) * 2018-04-04 2018-09-04 清华大学 The application of a kind of perovskite thin film and preparation method thereof and the film in the opto-electronic device
CN109216555A (en) * 2018-08-27 2019-01-15 电子科技大学 Perovskite-type compounds layer and battery and preparation method thereof
CN110635039A (en) * 2019-08-21 2019-12-31 厦门大学 Method for passivating perovskite and perovskite solar cell
CN110817942A (en) * 2019-11-13 2020-02-21 中国工程物理研究院化工材料研究所 Preparation method of all-inorganic perovskite precursor and battery prepared based on all-inorganic perovskite precursor
CN111430554A (en) * 2020-03-25 2020-07-17 杭州纤纳光电科技有限公司 Preparation method of perovskite thin film added with triiodide, preparation method of battery and battery

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Title
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