A tin-based perovskite solar cell powered RFID electronic tag

Abstract

The application discloses a kind of tin-based perovskite solar cell powered RFID electronic tags, the electronic tag includes tin-based perovskite solar cell, tag antenna, tag chip and substrate, tin-based perovskite solar cell, tag antenna, tag chip are connected and arranged on the substrate, the power supply output end of tin-based perovskite solar cell is connected with the power supply input end of tag chip and is arranged;The tag antenna is connected with the radio frequency input end of tag chip and is arranged.The application uses environment-friendly tin-based perovskite material to prepare solar cell, as RFID electronic tag power supply.Compared with traditional battery, tin-based solar cell is high in resource utilization rate, simultaneously prolongs the service life of RFID electronic tag, and meets the concept of green, environmental protection and high efficiency.

Description

Technical Field

[0001] This invention belongs to the field of solar cell application technology, and in particular to an RFID electronic tag powered by a tin-based perovskite solar cell. Background Technology

[0002] Radio Frequency Identification (RFID) technology is a type of automatic identification technology that uses wireless radio frequency for non-contact, two-way data communication. It reads and writes data to recording media (electronic tags or RFID cards) using radio frequency to achieve target identification and data exchange. It is considered one of the most promising information technologies of the 21st century. RFID technology can be divided into three categories based on the power supply method of its tags: passive RFID, active RFID, and semi-active RFID. Active and semi-active RFID both require a power source. Although RFID electronic tags consume little energy, continuous power supply presents challenges due to wired connections or battery replacement issues, leading to increased costs and operational inconvenience. Indoor photovoltaics can solve this problem. Indoor photovoltaics collect indoor solar energy and convert it into electrical energy to power indoor electronic tags. In the field of indoor photovoltaics, the performance of existing silicon solar cells is not ideal. Perovskite solar cells have attracted attention due to their excellent photoelectric conversion efficiency, with lead-containing perovskite indoor photovoltaic efficiencies exceeding 35% (Adv. Mater., 2021, 33, 2100770; Adv. Energy Mater., 2018, 8, 1801509; Adv. Mater., 2022, 34, 2200320). However, the use of the toxic heavy metal Pb remains an unavoidable obstacle. Developing lead-free perovskite indoor photovoltaics is a major trend in the future development of electronic tag technology. Although the development of lead-free tin-based perovskite solar cells has only been around for a little over a decade, its photovoltaic power generation efficiency has increased from 3% to 14.81%. Tin-based perovskite materials combine the advantages of high efficiency and low-cost preparation, showing great potential for the future. In addition, tin-based perovskite materials have an adjustable bandgap, exhibit excellent indoor photovoltaic performance with a wide bandgap, and tin is non-toxic and harmless to the environment and human body. These characteristics perfectly meet the application requirements of RFID electronic tag power batteries.

[0003] A search revealed no patent publications related to this invention's patent application. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an RFID electronic tag powered by a tin-based perovskite solar cell.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] An RFID electronic tag powered by a tin-based perovskite solar cell is disclosed. The electronic tag includes a tin-based perovskite solar cell, a tag antenna, a tag chip, and a substrate. The tin-based perovskite solar cell, the tag antenna, and the tag chip are connected and disposed together on the substrate. The power output terminal of the tin-based perovskite solar cell is connected to the power input terminal of the tag chip. The tag antenna is connected to the radio frequency input terminal of the tag chip.

[0007] The tin-based perovskite solar cell comprises, from bottom to top, a transparent conductive cathode glass, a hole transport layer, a tin-based perovskite active layer, an electron transport layer, a modification layer, and a metal anode, which are connected in sequence.

[0008] Furthermore, the hole transport layer of the tin-based perovskite solar cell is prepared by spin-coating a PEDOT:PSS solution with a mass concentration of 1.3–1.7 wt%.

[0009] Furthermore, the electron transport layer of the tin-based perovskite solar cell is prepared by spin-coating an organic electron transport material solution with a concentration of 20 mg / ml. -1 Alternatively, the electron transport layer is a C-type material deposited using vacuum evaporation. 60 It was obtained.

[0010] Furthermore, the organic electron transport material is ICBA or PCBM.

[0011] Furthermore, the modification layer of the tin-based perovskite solar cell is a 2,9-dimethyl-4,7-biphenyl-1,10-o-phenanthroline (BCP) thin film;

[0012] Alternatively, the transparent conductive cathode glass ITO of the tin-based perovskite solar cell may be used, and the metal anode may be a metal electrode Ag or Al.

[0013] Furthermore, the precursor solution for the tin-based perovskite active layer of the tin-based perovskite solar cell is prepared by dissolving phenylethylamine hydrobromide (PEABr), formamidinium hydrobromide (FABr), stannous iodide (SnI2), and stannous fluoride (SnF2) in dimethyl sulfoxide (DMSO), with a molar concentration of 0.85 mmol / ml.

[0014] The molar ratio of phenylethylamine hydrobromide (PEABr): formamidine hydrobromide (FABr): stannous iodide (SnI2): stannous fluoride (SnF2) is 0.1:0.9:1:0.1.

[0015] Furthermore, the fabrication of the tin-based perovskite solar cell includes the following steps:

[0016] (1) Clean the transparent conductive cathode glass with detergent and water using ultrasonic cleaning for 15 minutes, then rub it clean with clean rubber gloves. Then clean it with deionized water, ethanol, acetone and isopropanol in sequence, 15 minutes each, to remove impurities and organic residues from the surface of the ITO glass.

[0017] (2) After cleaning the transparent conductive cathode glass, dry it with a nitrogen gun and put it into an ultraviolet-ozone cleaner for 20 minutes. This will have a photosensitive oxidative decomposition effect on the organic matter remaining on the surface of the ITO glass, decompose the organic matter on the surface, and convert it into functional groups with high hydrophilicity (such as -OH, -CHO, -COOH, etc.) to enhance the spreadability of the surface.

[0018] (3) Coat the PEDOT:PSS solution by rotating at 6000 rpm for 40 seconds and anneal at 140℃ for 20 min;

[0019] (4) Take the precursor solution of the tin-based perovskite active layer and spin-coat it at 1000 rpm for 10 s, then spin at 5000 rpm for 30 s; at the 22nd second of the 30 s stage, drop toluene onto the surface. The volume ratio of precursor solution to toluene is 1:3. Anneal the substrate at 80℃ for 10 min.

[0020] (5) The electron transport layer material solution was rotated at 1000 rpm for 20-30 s and then annealed at 70 °C for 10 min; the BCP solution was rotated at 6000 rpm for 30 s and the prepared film was thermally annealed at 70 °C for 10 min; all precursors were filtered with a 0.22 μm polytetrafluoroethylene filter before rotation coating; finally, a 120 nm Ag layer was deposited using a vacuum evaporation system.

[0021] Furthermore, in step (5), when the BCP solution is an isopropanol solution of BCP, it is a saturated solution; when the BCP solution is a trifluoroethanol solution of BCP, the concentration of BCP is 1 mg / ml. -1 ;

[0022] In step (5), the electron transport layer material solution has a concentration of 20 mg / ml. -1 ICBA chlorobenzene solution.

[0023] Furthermore, the molar ratio of anions in the tin-based perovskite solar cell is iodide ions (I₂). - ): Bromine ion (Br) - The ratio of active layer to active layer is 2:1, and the band gap of active layer is 1.65 eV.

[0024] Furthermore, the tag antenna is a dipole antenna, a loop antenna, or a microstrip patch antenna.

[0025] The advantages and positive effects of this invention are as follows:

[0026] 1. This invention uses environmentally friendly tin-based perovskite materials to fabricate solar cells as power sources for RFID electronic tags. Compared with traditional batteries, tin-based solar cells have higher resource utilization rates and extend the lifespan of RFID electronic tags, aligning with the principles of green, environmentally friendly, and high-efficiency operation.

[0027] 2. This invention employs a wide-bandgap tin-based perovskite solar cell, perfectly suited to the application scenarios of electronic tags. Compared to silicon solar cells, the bandgap of tin-based perovskite materials is adjustable, and the wide-bandgap tin-based perovskite solar cells exhibit excellent indoor photovoltaic performance, solving the problem of insufficient performance of traditional solar cells in indoor settings.

[0028] 3. In the RFID electronic tag of this invention, tin is an environmentally friendly element. Using tin-based perovskite solar cells can further improve the performance of the RFID electronic tag, and it is non-toxic and harmless to the environment and human body.

[0029] 4. This invention yields a stable, non-toxic, and harmless tin-based perovskite solar cell. This invention expands the application scenarios of semi-active tags, enabling them to operate for extended periods without battery replacement, and also improves the communication distance between passive and semi-active tags. Figure 6 At the same time, environmentally friendly materials are used to avoid environmental pollution during the production process.

[0030] 5. In this invention, the hole transport layer of the tin-based perovskite solar cell is a PEDOT:PSS thin film, and the electron transport layer is ICBA, PCBM, or C. 60 Organic electron transport layer material thin films, which have energy levels that match the active layer, are beneficial for carrier transport and improve battery performance.

[0031] The modification layer of the tin-based perovskite solar cell is a dimethyl-4,7-biphenyl-1,10-o-phenanthroline (BCP) film, which can reduce the performance loss caused by direct contact between the organic electron transport layer and the metal electrode, while hindering the migration of metal ions and increasing the stability of the cell.

[0032] The active layer precursor solution for tin-based perovskite solar cells is prepared by dissolving phenylethyl hydrobromide (PEABr): formamidinium hydrobromide (FABr): stannous iodide (SnI2): stannous fluoride (SnF2) in dimethyl sulfoxide (DMSO). PEABr can improve the crystallinity of tin-based perovskite, while SnF2 can optimize the cell performance. Attached Figure Description

[0033] Figure 1This is a schematic diagram of the structural connection of an RFID electronic tag according to the present invention; wherein, the tag chip is an EM4325 chip, the tag antenna is an ultra-high frequency antenna, and the substrate is a glass substrate;

[0034] Figure 2 This is a schematic diagram of a single tin-based perovskite solar cell device in Embodiment 1 of the present invention (from bottom to top in the figure: 5 transparent conductive cathode glass, 6 hole transport layer, 7 tin-based perovskite active layer, 8 electron transport layer, 9 modification layer and 10 metal anode).

[0035] Figure 3 The current density-voltage characteristic curve of a single tin-based perovskite solar cell device in Example 2 of this invention under one solar light intensity is shown.

[0036] Figure 4 The current density-voltage characteristic curve of a single tin-based perovskite solar cell device in Example 2 of this invention is shown in a common indoor scenario (1062 lux).

[0037] Figure 5 This refers to the number of signals emitted per minute by the tag in Example 2 of this invention when it is driven by a tin-based perovskite solar cell in a common indoor setting (1062 lux).

[0038] Figure 6 This is a comparison between the farthest distance at which the tag in Embodiment 2 of the present invention can measure signals when driven by a tin-based perovskite solar cell in a common indoor scene (1062 lux) and the farthest distance at which the standard tag can measure signals in the same scene. Detailed Implementation

[0039] The present invention will be further described below with reference to the embodiments. The following embodiments are descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0040] The various experimental operations involved in the specific embodiments are all conventional techniques in the field. For parts not specifically annotated in this document, those skilled in the art can refer to various commonly used reference books, scientific and technological documents or related instructions and manuals prior to the filing date of this invention to carry out the operations.

[0041] An RFID electronic tag powered by a tin-based perovskite solar cell is disclosed. The electronic tag includes a tin-based perovskite solar cell 1, a tag antenna 2, a tag chip 4, and a substrate 3. The tin-based perovskite solar cell, the tag antenna, and the tag chip are connected and disposed together on the substrate. The power output terminal of the tin-based perovskite solar cell is connected to the power input terminal of the tag chip. The tag antenna is connected to the radio frequency input terminal of the tag chip.

[0042] The tin-based perovskite solar cell comprises, from bottom to top, a transparent conductive cathode glass 5, a hole transport layer 6, a tin-based perovskite active layer 7, an electron transport layer 8, a modification layer 9, and a metal anode 10, which are connected in sequence.

[0043] Preferably, the hole transport layer of the tin-based perovskite solar cell is prepared by spin-coating a PEDOT:PSS solution with a mass concentration of 1.3 to 1.7 wt%.

[0044] Preferably, the electron transport layer of the tin-based perovskite solar cell is prepared by spin-coating an organic electron transport material solution with a concentration of 20 mg / ml. -1 Alternatively, the electron transport layer is a C-type material deposited using vacuum evaporation. 60 It was obtained.

[0045] Preferably, the organic electron transport material is ICBA or PCBM.

[0046] Preferably, the modification layer of the tin-based perovskite solar cell is a 2,9-dimethyl-4,7-biphenyl-1,10-o-phenanthroline (BCP) film;

[0047] Alternatively, the transparent conductive cathode glass ITO of the tin-based perovskite solar cell may be used, and the metal anode may be a metal electrode Ag or Al.

[0048] Preferably, the precursor solution for the tin-based perovskite active layer of the tin-based perovskite solar cell is prepared by dissolving phenylethylamine hydrobromide (PEABr), formamidinium hydrobromide (FABr), stannous iodide (SnI2), and stannous fluoride (SnF2) in dimethyl sulfoxide (DMSO), and the molar concentration of the product is 0.85 mmol / ml.

[0049] The molar ratio of phenylethylamine hydrobromide (PEABr): formamidine hydrobromide (FABr): stannous iodide (SnI2): stannous fluoride (SnF2) is 0.1:0.9:1:0.1.

[0050] Preferably, the fabrication of the tin-based perovskite solar cell includes the following steps: a transparent conductive cathode glass 5, a hole transport layer 6, a tin-based perovskite active layer 7, an electron transport layer 8, a modification layer 9, and a metal anode.

[0051] (1) Clean the transparent conductive cathode glass with detergent and water using ultrasonic cleaning for 15 minutes, then rub it clean with clean rubber gloves. Then clean it with deionized water, ethanol, acetone and isopropanol in sequence, 15 minutes each, to remove impurities and organic residues from the surface of the ITO glass.

[0052] (2) After cleaning the transparent conductive cathode glass, dry it with a nitrogen gun and put it into an ultraviolet-ozone cleaner for 20 minutes. This will have a photosensitive oxidative decomposition effect on the organic matter remaining on the surface of the ITO glass, decompose the organic matter on the surface, and convert it into functional groups with high hydrophilicity (such as -OH, -CHO, -COOH, etc.) to enhance the spreadability of the surface.

[0053] (3) Coat the PEDOT:PSS solution by rotating at 6000 rpm for 40 seconds and anneal at 140℃ for 20 min;

[0054] (4) Take the precursor solution of the tin-based perovskite active layer and spin-coat it at 1000 rpm for 10 s, then spin at 5000 rpm for 30 s; at the 22nd second of the 30 s stage, drop toluene onto the surface. The volume ratio of precursor solution to toluene is 1:3. Anneal the substrate at 80℃ for 10 min.

[0055] (5) The electron transport layer material solution was rotated at 1000 rpm for 20-30 s and then annealed at 70 °C for 10 min; the BCP solution was rotated at 6000 rpm for 30 s and the prepared film was thermally annealed at 70 °C for 10 min; all precursors were filtered with a 0.22 μm polytetrafluoroethylene filter before rotation coating; finally, a 120 nm Ag layer was deposited using a vacuum evaporation system.

[0056] Preferably, in step (5), when the BCP solution is an isopropanol solution of BCP, it is a saturated solution; when the BCP solution is a trifluoroethanol solution of BCP, the concentration of BCP is 1 mg / ml. -1 ;

[0057] In step (5), the electron transport layer material solution has a concentration of 20 mg / ml. -1 ICBA chlorobenzene solution.

[0058] Preferably, the molar ratio of anions in the tin-based perovskite solar cell is iodide ions (I₂). - ): Bromine ion (Br) - The ratio of active layer to active layer is 2:1, and the band gap of active layer is 1.65 eV.

[0059] Preferably, the tag antenna is a dipole antenna, a loop antenna, or a microstrip patch antenna.

[0060] Specifically, the relevant preparation and testing methods are as follows:

[0061] Example 1

[0062] An RFID electronic tag powered by a tin-based perovskite solar cell, such as Figure 1As shown, the electronic tag includes a tin-based perovskite solar cell 1, a tag antenna 2, a tag chip 4, and a substrate 3. The tin-based perovskite solar cell, the tag antenna, and the tag chip are connected and disposed on the substrate. The power output terminal of the tin-based perovskite solar cell is connected to the power input terminal of the tag chip. The tag antenna is connected to the radio frequency input terminal of the tag chip.

[0063] Specifically, the RFID electronic tag includes a tin-based perovskite solar cell, a tag antenna, a tag chip (EM4325), and a substrate, which is a glass substrate. The tin-based perovskite solar cell is first prepared on the glass substrate by spin coating. The positive and negative electrodes of the tin-based perovskite cell are formed by Ag vapor deposition. Then, the power output terminal is connected to the input terminal of the EM4325 chip, and the antenna output terminal is directly connected to the signal input terminal of the EM4325 chip. The tag antenna is an ultra-high frequency antenna with an operating frequency of 920MHz, and the material is copper.

[0064] The chip used in this invention can be replaced according to actual working performance requirements, and no specific restrictions are imposed on its application.

[0065] In this invention, the tin-based perovskite solar cell will affect the performance parameters of the RFID electronic tag. The specific area of ​​the tin-based perovskite solar cell used can be changed according to the requirements. There are no restrictions on the application of the technology in this invention.

[0066] The tag antenna in this invention can be a dipole antenna, a loop antenna, or a miniature patch antenna, and the material can be Ag, Cu, Al, etc. There are no restrictions on the application of the technology in this invention.

[0067] The substrate of this invention can be used as a coating substrate for tin-based perovskite materials, and can be made of materials such as glass and PVC. There are no limitations on the application of this invention.

[0068] Example 2

[0069] Tin-based perovskite solar cells as described above, such as Figure 2 As shown, the device structure of the tin-based perovskite solar cell includes, from bottom to top, a transparent conductive cathode glass 5, a hole transport layer 6, a tin-based perovskite active layer 7, an electron transport layer 8, a modification layer 9, and a metal anode 10, which are connected in sequence. The specific fabrication steps are as follows:

[0070] Step 1: Pre-treat the transparent conductive cathode substrate of the perovskite solar cell.

[0071] (1.1) Clean the transparent conductive cathode substrate with sheet resistance of 15Ω with detergent and water for 15 minutes, then rub it clean with clean rubber gloves. Then clean it with deionized water, ethanol, acetone and isopropanol in sequence, each step for 15 minutes.

[0072] (1.2) The cleaned transparent conductive cathode substrate was dried with nitrogen gas and placed in an ultraviolet-ozone cleaner for 20 minutes to obtain the pretreated transparent conductive cathode substrate.

[0073] Step 2: Fabricate the hole transport layer of PEDOT:PSS material.

[0074] (2.1) A PEDOT:PSS solution with a concentration of 1.3 to 1.7 wt% was used to coat the PEDOT:PSS solution by rotating at 6000 rpm for 40 seconds, and then annealed at 140°C in air for 20 min before being quickly transferred to an N2 atmosphere.

[0075] Step 3: Fabricate the active layer of the tin-based perovskite solar cell.

[0076] (3.1) Phenethyl hydrobromide (PEABr): formamidinium hydrobromide (FABr): stannous iodide (SnI2): stannous fluoride (SnF2) were dissolved in dimethyl sulfoxide (DMSO) in a molar ratio of 0.1:0.9:1:0.1, and PEA... 0.1 FA 0.9 The molar concentration of SnI₂Br is 0.85 mmol / ml. -1 A tin-based perovskite precursor solution was obtained.

[0077] (3.2) In a N2 atmosphere, using a spin coater, 200 μL of the active layer precursor solution was first spin-coated at 1000 rpm for 10 s, and then at 5000 rpm for 30 s. At the 22nd second of the 30 s phase, 600 μL of toluene was dropped onto the surface to obtain a uniform tin-based perovskite crystal film, which was then annealed at 80 °C for 10 min.

[0078] Step 4: Fabricate the electron transport layer of ICBA material.

[0079] (4.1) A concentration of 20 mg / ml was used. -1 An ICBA chlorobenzene solution was coated by spin coating at 1000 rpm for 20 seconds in an N2 atmosphere using a spin coater, followed by annealing at 70°C for 10 minutes to obtain an electron transport layer.

[0080] Step 5: Create a finishing layer of BCP material.

[0081] (5.1) The saturated BCP solution in isopropanol was coated by spin coating at 6000 rpm for 30 s in N2 atmosphere, and the prepared film was then heat-annealed at 70 °C for 10 min.

[0082] Step six: Fabricate the anode of Ag material.

[0083] (6.1) A vacuum evaporation equipment is used, with a chamber vacuum degree of 10. -5 Under Pa conditions, with At a certain rate, Ag with a thickness of 70-100 nm was deposited on the prepared hole transport layer as an anode to complete the fabrication of tin-based perovskite solar cells.

[0084] Preferably, the anion ratio of the tin-based perovskite solar cell is iodide ions (I₂). - ): Bromine ion (Br) - The ratio of active layer band gap is 1.65 eV, and the ratio is 2:1.

[0085] Preferably, the BCP-modified film can be prepared by spin coating using isopropanol or trifluoroethanol as solvents, or by vacuum evaporation under a chamber vacuum condition of 10. -5 Under Pa conditions, with At a rate of [missing information], a 5 nm thick BCP thin film was deposited on the electron transport layer.

[0086] Preferably, the electron transport layer of the tin-based perovskite solar cell is prepared by spin-coating a solution of ICBA, PCBM, or other organic electron transport materials at a concentration of 20 mg / ml. Alternatively, it can be prepared by vacuum evaporation of C... 60 It was obtained.

[0087] Figure 3 The current density-voltage curve of the tin-based perovskite solar cell in Example 2 is shown under a solar intensity (AM1.5G). It can be seen that the tin-based perovskite solar cell maintains an efficiency of about 10% under AM1.5G, which is the leading efficiency of tin-based perovskite solar cells in the current system.

[0088] Figure 4 The current density-voltage curve of the tin-based perovskite solar cell in Example 2 under a common indoor scenario (1062 lux) shows that the tin-based perovskite solar cell maintains an efficiency of about 15% under a light intensity of 1062 lux, which is sufficient to meet the working requirements of RFID electronic tags.

[0089] Figure 5 The number of signals transmitted per minute by the tag in Example 2 when it is driven by a tin-based perovskite solar cell in a common indoor setting (1062 lux) is approximately 9 times per minute. It can be seen that the tag can fully meet the daily working needs of RFID tags.

[0090] Figure 6This comparison of Example 2, showing the farthest measurable signal distance of the tag driven by a tin-based perovskite solar cell in a common indoor environment (1062 lux), and the farthest measurable signal distance of a standard tag in the same environment, shows that the tag driven by the tin-based perovskite solar cell has a maximum distance of approximately 6 meters, while the standard tag has a maximum distance of approximately 1 meter. This demonstrates that the introduction of tin-based perovskite solar cells can significantly enhance the tag's signal transmission distance, thereby enhancing its application functionality.

[0091] It should be noted that, Figure 3 The sunlight source in the image is a xenon lamp with a luminous intensity of 100 mW·cm⁻¹. -2 It is calibrated by a standard spectrometer. Figure 4 , Figure 5 and Figure 6 The indoor light source is a conventional LED light source with a color temperature of 3000K and a luminous intensity of 300uW / cm. -2 It is calibrated by a standard spectrometer.

[0092] Although embodiments of the invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations, and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the scope of the invention is not limited to the contents disclosed in the embodiments.

Claims

1. An RFID electronic tag powered by a tin-based perovskite solar cell, characterized in that: The electronic tag includes a tin-based perovskite solar cell, a tag antenna, a tag chip, and a substrate. The tin-based perovskite solar cell, the tag antenna, and the tag chip are connected and disposed together on the substrate. The power output terminal of the tin-based perovskite solar cell is connected to the power input terminal of the tag chip. The tag antenna is connected to the radio frequency input terminal of the tag chip. The tin-based perovskite solar cell comprises, from bottom to top, a transparent conductive cathode glass, a hole transport layer, a tin-based perovskite active layer, an electron transport layer, a modification layer, and a metal anode, which are connected in sequence. The hole transport layer of the tin-based perovskite solar cell is prepared by spin-coating a PEDOT:PSS solution with a mass concentration of 1.3~1.7 wt%. The electron transport layer of the tin-based perovskite solar cell is prepared by spin-coating an organic electron transport material solution with a concentration of 20 mg / ml. -1 Alternatively, the electron transport layer is a C-type material deposited using vacuum evaporation. 60 Prepared; The organic electron transport materials are ICBA and PCBM; The modification layer of the tin-based perovskite solar cell is a 2,9-dimethyl-4,7-biphenyl-1,10-o-diazaphenanthroline BCP thin film. The transparent conductive cathode glass ITO of the tin-based perovskite solar cell is used, and the metal anode is a metal electrode Ag or Al. The precursor solution for the tin-based perovskite active layer of the tin-based perovskite solar cell is prepared by dissolving phenylethylamine hydrobromide, formamidinium hydrobromide, stannous iodide, and stannous fluoride in dimethyl sulfoxide, with a molar concentration of 0.85 mmol / ml. The molar ratio of phenylethylamine hydrobromide: formamidinium hydrobromide: stannous iodide: stannous fluoride is 0.1:0.9:1:0.

1. The fabrication of the tin-based perovskite solar cell includes the following steps: (1) Clean the transparent conductive cathode glass with detergent and water using ultrasonic cleaning for 15 minutes, then rub it clean with clean rubber gloves. Then clean it with deionized water, ethanol, acetone and isopropanol in sequence, 15 minutes each, to remove impurities and organic residues from the surface of the ITO glass. (2) After the cleaned transparent conductive cathode glass is dried with a nitrogen gun, it is placed in an ultraviolet-ozone cleaner for 20 minutes to perform photosensitive oxidation decomposition on the organic matter remaining on the ITO glass surface, decompose the organic matter on the surface, and convert it into functional groups with high hydrophilicity to enhance the spreadability of the surface. (3) Coat the PEDOT:PSS solution by rotating at 6000 rpm for 40 seconds and anneal at 140°C for 20 min; (4) Take the precursor solution of the tin-based perovskite active layer and spin-coat it at 1000 rpm for 10 s, then spin at 5000 rpm for 30 s; at the 22nd second of the 30s stage, drop toluene onto the surface. The volume ratio of precursor solution to toluene is 1:

3. Anneal the substrate at 80℃ for 10 min. (5) The electron transport layer material solution was rotated at 1000 rpm for 20-30 s and then annealed at 70 °C for 10 min; the BCP solution was spin-coated at 6000 rpm for 30 s and the prepared film was thermally annealed at 70 °C for 10 min; all precursors were filtered with a 0.22 μm polytetrafluoroethylene filter before spin coating; finally, a 120 nm Ag layer was deposited using a vacuum evaporation system. In step (5), when the BCP solution is an isopropanol solution of BCP, it is a saturated solution; when the BCP solution is a trifluoroethanol solution of BCP, the concentration of BCP is 1 mg / ml. -1 ; In step (5), the electron transport layer material solution has a concentration of 20 mg / ml. -1 ICBA chlorobenzene solution; The molar ratio of anions in the tin-based perovskite solar cell is iodide ions: bromide ions = 2:1, and the band gap of the active layer is 1.65 eV.

2. The RFID electronic tag according to claim 1, characterized in that: The tag antenna is a dipole antenna, a loop antenna, or a microstrip patch antenna.

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