Transparent display screen with perovskite solar cell charging function and preparation method thereof

Abstract

The invention relates to the field of solar cell power generation and light-emitting display, in particular to a transparent display screen with a perovskite solar cell charging function and a preparation method of the transparent display screen. The display screen comprises a transparent substrate, the upper side and the lower side of the transparent substrate are provided with a light-emitting display module and a double-sided perovskite solar cell module respectively, and a touch screen, a polaroid and a transparent packaging module are further arranged on the light-emitting display module in a stacked mode. The light-emitting display module and the double-sided perovskite solar cell module are respectively connected with the same charging and discharging control unit and the same electricity storage unit, and the charging and discharging control unit is connected with the electricity storage unit. The perovskite double-sided perovskite solar cell module and the light-emitting display module are integrated, so that integration of power generation and display is realized, and transparency of the perovskite solar cell and the light-emitting display module is realized; moreover, the light-emitting display module can be used as a display unit and also can be used as a light source of the perovskite solar cell, so that self power supply of the display screen is realized.

Description

Technical Field

[0001] The present invention relates to the fields of solar cell power generation and light-emitting display, and particularly to a transparent display screen with a perovskite solar cell charging function and a preparation method thereof. Background Art

[0002] As an interface for human-computer interaction, the display screen plays a crucial role. With the development of technology and people's pursuit of quality of life, transparent display screens have become a hot topic.

[0003] However, some display screens need to be carried around, and the capacity of the storage battery cannot meet the long-term energy supply of the display screen. It is necessary to carry a charging device, or perhaps find a place with mains power for charging, which brings inconvenience to people's lives.

[0004] Solar energy is an inexhaustible and clean energy source. It can convert light energy into electrical energy through solar cells for the display screen to use, and is expected to solve the problem of long-term energy supply for the display screen.

[0005] However, at present, most solar cells exist in the form of solar power banks, which are inconvenient to carry. How to integrate the solar cell and the display screen into one, and increase the transparency of the solar cell and the display screen, is one of the difficult problems that those skilled in the art urgently need to solve.

[0006] Although perovskite solar cells can be made into batteries with relatively high transparency, which provides the possibility for integrating solar cell charging and transparent display. However, how to integrate the solar cell and the transparent display screen into one to improve the portability and convenience of people using the transparent display screen, the prior art has still not found a solution so far. Summary of the Invention

[0007] The invention purpose of the present invention is: to solve the problems existing in the prior art, that is, how to integrate the solar cell and the transparent display screen into one to improve the portability and convenience of people using the transparent display screen. The present invention provides a transparent display screen with a perovskite solar cell charging function and a preparation method thereof.

[0008] To solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0009] A transparent display screen with a perovskite solar cell charging function includes a transparent substrate. A light-emitting display module and a double-sided perovskite solar cell module are respectively arranged on the upper and lower sides of the transparent substrate. The light-emitting display module and the double-sided perovskite solar cell module share the same transparent substrate. A touch screen, a polarizer and a transparent encapsulation module are also stacked on the upper surface of the light-emitting display module;

[0010] The light-emitting display module and the double-sided perovskite solar cell module are also respectively connected to the same charge-discharge control unit, and the charge-discharge control unit is also connected to a power storage unit.

[0011] As an improvement to the technical solution of the transparent display screen with the perovskite solar cell charging function of the present invention, the double-sided perovskite solar cell module includes a first transparent electrode conductive layer, a first electron transport layer, a perovskite photoactive layer, a first hole transport layer, and a first transparent top electrode that are stacked.

[0012] The light-emitting display module includes a second transparent electrode conductive layer, a second hole transport layer, a light-emitting display screen, a second electron transport layer, and a second transparent top electrode that are stacked.

[0013] As an improvement to the technical solution of the transparent display screen with the perovskite solar cell charging function of the present invention, the double-sided perovskite solar cell module is a normal structure or an inverted structure, and / or the light-emitting display module is a forward structure or an inverted structure;

[0014] As an improvement to the technical solution of the transparent display screen with the perovskite solar cell charging function of the present invention, when the double-sided perovskite solar cell is a normal structure, the double-sided perovskite solar cell includes the first transparent electrode conductive layer, the first electron transport layer, the perovskite photoactive layer, the first hole transport layer, and the first transparent top electrode that are sequentially stacked;

[0015] When the double-sided perovskite solar cell is an inverted structure, the double-sided perovskite solar cell includes the first transparent electrode conductive layer, the first hole transport layer, the perovskite photoactive layer, the first electron transport layer, and the first transparent top electrode that are sequentially stacked;

[0016] When the light-emitting display module is a forward structure, the light-emitting display module includes the second transparent electrode conductive layer, the second hole transport layer, the light-emitting display screen, the second electron transport layer, and the second transparent top electrode that are sequentially stacked;

[0017] When the light-emitting display module is an inverted structure, the light-emitting display module includes the second transparent electrode conductive layer, the second electron transport layer, the light-emitting display screen, the second hole transport layer, and the second transparent top electrode that are sequentially stacked.

[0018] As an improvement to the technical solution of the transparent display screen with the perovskite solar cell charging function of the present invention, the first transparent electrode conductive layer and the transparent top electrode in the double-sided perovskite solar cell module are respectively connected to the second transparent electrode conductive layer and the second transparent top electrode in the light-emitting display module through the charge and discharge control unit.

[0019] As an improvement to the technical solution of the transparent display screen with the perovskite solar cell charging function of the present invention, the structure of the perovskite photoactive layer is ABX3, where A is one or more of Cs, MA, and FA, B is one or more of Pb, Sn, Ge, Bi, In, and Sb, and X is one or more of I, Br, and Cl.

[0020] As an improvement to the technical solution of the transparent display screen with the perovskite solar cell charging function of the present invention, the light-emitting display screen includes red, green, and blue primary color modules, and the materials thereof are one or more of cadmium-based quantum dots, indium phosphide-based quantum dots, zinc selenide-based quantum dots, zinc sulfide quantum dots, copper indium sulfide quantum dots, silver indium sulfide quantum dots, perovskite quantum dots, and organic light-emitting materials.

[0021] As an improvement to the technical solution of the transparent display screen with the perovskite solar cell charging function of the present invention, the materials of the first transparent electrode conductive layer and the second transparent electrode conductive layer are one or more of indium tin oxide, fluorine-doped tin oxide, and aluminum-doped zinc oxide;

[0022] The materials of the first transparent top electrode and the second transparent top electrode are transparent copper grids, transparent silver grids, or transparent electrodes with a dielectric / metal / dielectric structure.

[0023] As an improvement to the technical solution of the transparent display screen with the perovskite solar cell charging function of the present invention, the materials of the first electron transport layer are one or more of SnO2, TiO2, ZnS, PCBM, C60, and ICBA;

[0024] The materials of the first hole transport layer are one or more of PEDOT:PSS, Spiro-OMeTAD, PTAA, NiOx, TPE, P3TH, and CuSCN;

[0025] The materials of the second electron transport layer are one or more of ZnO, yttrium-doped ZnO, lithium-doped ZnO, fluorine-doped ZnO, Alq3, Almq3, DVPBi, TAZ, OXD, PBD, and BND;

[0026] The materials of the second hole transport layer are one or more of PEDOT:PSS, PVK, TPD, NPB, CBP, TCTA, HAT-CN, and MoOx.

[0027] A method for preparing a transparent display screen with a perovskite solar cell charging function, and preparing the transparent display screen with a perovskite solar cell charging function as described above, including the following steps:

[0028] S1. Prepare a light-emitting display module:

[0029] S11. Clean and dry the transparent substrate, and perform ultraviolet ozone treatment or plasma treatment;

[0030] S12. Sputter a second transparent electrode conductive layer on one side of the transparent substrate by magnetron sputtering;

[0031] S13. Prepare a second hole transport layer, a light-emitting display screen, and a second electron transport layer in sequence on the second transparent electrode conductive layer by spin coating, thermal evaporation, or magnetron sputtering, or prepare a second electron transport layer, a light-emitting display screen, and a second hole transport layer in sequence;

[0032] S14. Prepare a second transparent top electrode by thermal evaporation or magnetron sputtering to obtain a light-emitting display module;

[0033] S2. Prepare a solar cell module:

[0034] S21. Encapsulate and protect the side of the transparent substrate with the light-emitting display module, and clean the other side of the transparent substrate;

[0035] S22. Sputter a first transparent electrode conductive layer on one side of the transparent substrate by magnetron sputtering;

[0036] S23. Prepare a first hole transport layer, a perovskite photoactive layer, and a first electron transport layer in sequence on the transparent electrode conductive layer by spin coating, doctor blading, slot die coating, thermal evaporation, or magnetron sputtering, or prepare a first electron transport layer, a perovskite photoactive layer, and a first hole transport layer in sequence;

[0037] S24. Prepare a first transparent top electrode by thermal evaporation or magnetron sputtering to obtain a solar cell module;

[0038] S3. Connect the light-emitting display module and the solar cell module to a storage unit through a charge-discharge control unit, and encapsulate them with a transparent encapsulation module to obtain a transparent display screen with a perovskite solar cell charging function.

[0039] Advantages of the present invention:

[0040] 1. In the present invention, a perovskite double-sided perovskite solar cell module and a light-emitting display module are integrated into one, achieving the integration of power generation and display. At the same time, the perovskite solar cell and the light-emitting display module are made transparent, solving the problem in the prior art that a transparent display screen must be externally powered. Moreover, the light-emitting display module can serve as both a display unit and a light source for the perovskite solar cell, realizing the self-power supply of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 FIG. is a schematic structural diagram of a transparent display screen with a perovskite solar cell charging function according to the present invention;

[0042] Figure 2 FIG. is a schematic structural diagram of a first embodiment of a transparent display screen with a perovskite solar cell charging function according to the present invention;

[0043] Figure 3 FIG. is a schematic structural diagram of a second embodiment of a transparent display screen with a perovskite solar cell charging function according to the present invention;

[0044] Figure 4 FIG. is a schematic structural diagram of a third embodiment of a transparent display screen with a perovskite solar cell charging function according to the present invention;

[0045] Figure 5 FIG. is a schematic structural diagram of a fourth embodiment of a transparent display screen with a perovskite solar cell charging function according to the present invention;

[0046] DESCRIPTION OF REFERENCE NUMERALS: 1 - transparent substrate; 2 - double-sided perovskite solar cell module; 3 - light-emitting display module; 4 - touch screen; 5 - polarizer; 6 - transparent encapsulation module; 7 - charge and discharge control unit; 8 - electricity storage unit; 9 - first transparent electrode conductive layer; 10 - first electron transport layer; 11 - perovskite photoactive layer; 12 - first hole transport layer; 13 - first transparent top electrode; 14 - second transparent top electrode; 15 - second electron transport layer; 16 - light-emitting display screen; 17 - second hole transport layer; 18 - second transparent electrode conductive layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the technical solutions 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0048] As Figure 1As shown in the figure, a transparent display screen with the charging function of a perovskite solar cell includes a transparent substrate 1. A light-emitting display module 3 and a double-sided perovskite solar cell module 2 are respectively arranged on the upper and lower sides of the transparent substrate 1. The light-emitting display module 3 and the double-sided perovskite solar cell module 2 share the same transparent substrate 1. A touch screen 4, a polarizer 5 and a transparent encapsulation module 6 are also stacked on the upper surface of the light-emitting display module 3;

[0049] The light-emitting display module 3 and the double-sided perovskite solar cell module 2 are also respectively connected to the same charge-discharge control unit 7, and the charge-discharge control unit 7 is also connected to a power storage unit 8, wherein the electric energy of the power storage unit 8 is obtained by converting solar energy into electric energy.

[0050] In the present invention, the double-sided perovskite solar cell module 2 and the light-emitting display module 3 are integrated into one body, realizing the integration of power generation and display. At the same time, the perovskite solar cell and the light-emitting display module 3 are made transparent; moreover, the light-emitting display module 3 can not only be used as a display unit, but also exist as a light source of the perovskite solar cell, realizing the self-power supply of the display screen.

[0051] Further, the double-sided perovskite solar cell module 2 includes a first transparent electrode conductive layer 9, a first electron transport layer 10, a perovskite photoactive layer 11, a first hole transport layer 12, and a first transparent top electrode 13 which are stacked; wherein, the perovskite photoactive layer 11 is used to absorb the light in the surrounding environment and generate carriers, and the first electron transport layer 10 and the first hole transport layer 12 are used for the transport of carriers.

[0052] The light-emitting display module 3 includes a second transparent electrode conductive layer 18, a second hole transport layer 17, a light-emitting display screen 16, a second electron transport layer 15 and a second transparent top electrode 14 which are stacked. Among them, the light-emitting display screen 16 is used for the recombination of carriers, thereby realizing the functions of light emission and display, and the second electron transport layer 15 and the second hole transport layer 17 are used for the transport of carriers.

[0053] Preferably, the first transparent electrode conductive layer and the transparent top electrode in the double-sided perovskite solar cell module 2 are respectively connected to the second transparent electrode conductive layer and the second transparent top electrode 14 in the light-emitting display module 3 through the charge-discharge control unit 7.

[0054] The working process of the present invention is as follows: When the transparent display screen is not turned on, both sides of the double-sided perovskite solar cell module 2 can receive the light from the surrounding environment, convert the light energy into electrical energy, and through the charge and discharge controller, part of the electrical energy is directly supplied to the transparent display screen, and part of the electrical energy is directly stored in the power storage unit 8 for standby of the transparent display screen; When the transparent display screen is turned on, both sides of the double-sided perovskite solar cell module 2 can not only receive the light from the surrounding environment, but also receive the light emitted by the light-emitting display module 3, convert the light energy into electrical energy, and through the charge and discharge controller, part of the electrical energy is directly supplied to the transparent display screen, and part of the electrical energy is directly stored in the power storage unit 8 for standby of the transparent display screen; That is, the light-emitting display module 3 can be used as a light source for the solar cell module to generate electricity, and at the same time, it also consumes the electricity generated by the solar cell as an energy usage unit.

[0055] Furthermore, the double-sided perovskite solar cell module 2 is a normal structure or an inverted structure, and / or, the light-emitting display module 3 is a normal structure or an inverted structure.

[0056] Specifically, when the double-sided perovskite solar cell is a normal structure, the double-sided perovskite solar cell includes a first transparent electrode conductive layer 9, a first electron transport layer 10, a perovskite photoactive layer 11, a first hole transport layer 12, and a first transparent top electrode 13 that are sequentially stacked;

[0057] When the double-sided perovskite solar cell is an inverted structure, the double-sided perovskite solar cell includes a first transparent electrode conductive layer 9, a first hole transport layer 12, a perovskite photoactive layer 11, a first electron transport layer 10, and a first transparent top electrode 13 that are sequentially stacked;

[0058] When the light-emitting display module 3 is a normal structure, the light-emitting display module 3 includes a second transparent electrode conductive layer 18, a second hole transport layer 17, a light-emitting display screen 16, a second electron transport layer 15, and a second transparent top electrode 14 that are sequentially stacked;

[0059] When the light-emitting display module 3 is an inverted structure, the light-emitting display module 3 includes a second transparent electrode conductive layer 18, a second electron transport layer 15, a light-emitting display screen 16, a second hole transport layer 17, and a second transparent top electrode 14 that are sequentially stacked.

[0060] The present invention also provides a preparation method of a transparent display screen with a perovskite solar cell charging function, which is used to prepare the transparent display screen with a perovskite solar cell charging function as described above, and includes the following steps:

[0061] S1. Prepare the light-emitting display module 3:

[0062] S11. Clean and dry the transparent substrate 1, and perform ultraviolet ozone treatment or plasma treatment;

[0063] S12. Sputter a second transparent electrode conductive layer 18 on one side of the transparent substrate 1 by magnetron sputtering method;

[0064] S13. Prepare a second hole transport layer 17, a light-emitting display screen 16, and a second electron transport layer 15 in sequence on the second transparent electrode conductive layer 18 by spin coating method, thermal evaporation method or magnetron sputtering method, or prepare a second electron transport layer 15, a light-emitting display screen 16, and a second hole transport layer 17 in sequence;

[0065] S14. Prepare a second transparent top electrode 14 by thermal evaporation or magnetron sputtering method, that is, obtain the light-emitting display module 3;

[0066] S2. Prepare a double-sided perovskite solar cell module 2:

[0067] S21. Protect and encapsulate the side of the transparent substrate 1 provided with the light-emitting display module 3, and clean the other side of the transparent substrate 1;

[0068] S22. Sputter a first transparent electrode conductive layer 9 on one side of the transparent substrate 1 by magnetron sputtering method;

[0069] S23. Prepare a first hole transport layer 12, a perovskite photoactive layer 11, and a first electron transport layer 10 in sequence on the first transparent electrode conductive layer 9 by spin coating method, doctor blade coating method, slot die coating method, thermal evaporation method or magnetron sputtering method, or prepare a first electron transport layer 10, a perovskite photoactive layer 11, and a first hole transport layer 12 in sequence;

[0070] S24. Prepare a first transparent top electrode 13 by thermal evaporation or magnetron sputtering method, that is, obtain the double-sided perovskite solar cell module 2;

[0071] S3. Connect the light-emitting display module 3 and the double-sided perovskite solar cell module 2 to the electricity storage unit 8 through the charge and discharge control unit 7, and encapsulate them with the transparent encapsulation module 6, then a transparent display screen with a perovskite solar cell charging function can be obtained.

[0072] As the first embodiment of the present invention, as Figure 1 and Figure 2 shown, the double-sided perovskite solar cell module 2 is a formal structure, and the light-emitting display module 3 is an upright structure.

[0073] That is, the double-sided perovskite solar cell includes a first transparent electrode conductive layer 9, a first electron transport layer 10, a perovskite photoactive layer 11, a first hole transport layer 12, and a first transparent top electrode 13 that are sequentially stacked; the light-emitting display module 3 includes a second transparent electrode conductive layer 18, a second hole transport layer 17, a light-emitting display screen 16, a second electron transport layer 15, and a second transparent top electrode 14 that are sequentially stacked.

[0074] In this embodiment, the preparation processes of the double-sided perovskite solar cell module 2 and the light-emitting display module 3 are as follows:

[0075] S1. Prepare the light-emitting display module 3:

[0076] S11. Clean and dry the transparent substrate 1, and perform ultraviolet ozone treatment or plasma treatment.

[0077] S12. Sputter ITO on one side of the transparent substrate 1 by magnetron sputtering as the second transparent electrode conductive layer 18.

[0078] S13. Prepare PEDOT:PSS on the second transparent electrode conductive layer 18 by spin coating as the second hole transport layer 17. According to different mask patterns, spin coat InP / ZnSe / ZnS, InP / GaP / ZnS, and InP / ZnS red, green, and blue quantum dots as the light-emitting display screen 16, and then spin coat ZnO as the second electron transport layer 15.

[0079] S14. Evaporate an Ag grid as the second transparent top electrode 14 by evaporation process in cooperation with a mask; thus, the light-emitting display module 3 is obtained.

[0080] S2. Prepare the double-sided perovskite solar cell module 2:

[0081] S21. Package and protect the side of the transparent substrate 1 with the light-emitting display module 3, and clean the other side of the transparent substrate 1.

[0082] S22. Sputter ITO on one side of the substrate by magnetron sputtering as the first transparent electrode conductive layer 9.

[0083] S23. Prepare PEDOT:PSS on the first transparent electrode conductive layer 9 by spin coating as the first hole transport layer 12, prepare the FAPbI3 perovskite active layer by spin coating, and prepare C60 as the first electron transport layer 10 by thermal evaporation.

[0084] S24. Prepare a DMD structure transparent top electrode 1 of ITO / Ag / ITO by magnetron sputtering method; thus, the double-sided perovskite solar cell module 2 is obtained.

[0085] S3. Connect the light-emitting display module 3 and the double-sided perovskite solar cell module 2 to the electricity storage unit 8 through the charge and discharge control unit 7, and encapsulate them with the transparent encapsulation module 6, then a transparent display screen with the function of charging by the perovskite solar cell can be obtained.

[0086] As the second implementation manner of the present invention, as Figure 1 and Figure 3 shown, the double-sided perovskite solar cell module 2 is of a reverse structure, and the light-emitting display module 3 is of an inverted structure.

[0087] That is, the double-sided perovskite solar cell includes a first transparent electrode conductive layer 9, a first hole transport layer 12, a perovskite photoactive layer 11, a first electron transport layer 10, and a first transparent top electrode 13 that are sequentially stacked; the light-emitting display module 3 includes a second transparent electrode conductive layer 18, a second electron transport layer 15, a light-emitting display screen 16, a second hole transport layer 17, and a second transparent top electrode 14 that are sequentially stacked.

[0088] In this implementation manner, the preparation processes of the double-sided perovskite solar cell module 2 and the light-emitting display module 3 are as follows:

[0089] S1. Prepare the light-emitting display module 3:

[0090] S11. Clean and dry the transparent glass substrate, and perform ultraviolet ozone treatment or plasma treatment;

[0091] S12. Use magnetron sputtering to sputter ITO on one side of the substrate as the second transparent electrode conductive layer 18;

[0092] S13. Use spin coating to prepare ZnO as the second electron transport layer 15 on the second transparent electrode conductive layer 18, use inkjet printing to prepare InP / ZnSe / ZnS, InP / GaP / ZnS, InP / ZnS red, green, and blue quantum dots as the light-emitting display screen 16, and then spin coat Poly-TPD as the second hole transport layer 17;

[0093] S14. Use evaporation process in cooperation with a mask to evaporate Ag grid as the second transparent top electrode 14; that is, the light-emitting display module 3 is obtained;

[0094] S2. Prepare the double-sided perovskite solar cell module 2:

[0095] S21. Encapsulate and protect the side of the transparent substrate 1 with the light-emitting display module 3, and clean the other side of the transparent substrate 1;

[0096] S22. Use magnetron sputtering to sputter FTO on one side of the substrate as the first transparent electrode conductive layer 9;

[0097] S23. Prepare SnO2 as the first electron transport layer 10 on the first transparent electrode conductive layer 9 by spin coating, prepare the CsPbI3 perovskite active layer by spin coating, and prepare Spiro-OMeTAD as the first hole transport layer 12 by spin coating;

[0098] S24. Prepare the first transparent top electrode 13 with the DMD structure of ITO / Ag / ITO by magnetron sputtering method, that is, obtain the double-sided perovskite solar cell module 2;

[0099] S3. Connect the light-emitting display module 3 and the double-sided perovskite solar cell module 2 to the electricity storage unit 8 through the charge and discharge control unit 7, and package them with the transparent encapsulation module 6, then a transparent display screen with the function of charging the perovskite solar cell can be obtained.

[0100] As the third implementation mode of the present invention, as Figure 1 and Figure 4 shown, the double-sided perovskite solar cell module 2 is of an inverted structure, and the light-emitting display module 3 is of a normal structure.

[0101] That is, the double-sided perovskite solar cell includes a first transparent electrode conductive layer 9, a first hole transport layer 12, a perovskite photoactive layer 11, a first electron transport layer 10, and a first transparent top electrode 13 which are sequentially stacked;

[0102] The light-emitting display module 3 includes a second transparent electrode conductive layer 18, a second hole transport layer 17, a light-emitting display screen 16, a second electron transport layer 15, and a second transparent top electrode 14 which are sequentially stacked.

[0103] In this implementation mode, the preparation processes of the double-sided perovskite solar cell module 2 and the light-emitting display module 3 are as follows:

[0104] S1. Prepare the light-emitting display module 3:

[0105] S11. Clean and dry the transparent glass substrate, and perform ultraviolet ozone treatment or plasma treatment;

[0106] S12. Sputter ITO on one side of the substrate by magnetron sputtering method as the second transparent electrode conductive layer 18;

[0107] S13. Prepare a mixture of PEDOT:PSS and PVK as the second hole transport layer 17 on the second transparent electrode conductive layer 18 by spin coating. According to different mask patterns, spin coat CsPbI3, CsPbBr3, and CsPbCl3 red, green, and blue quantum dots as the light-emitting display screen 16 respectively, and then spin coat yttrium-doped ZnO as the second electron transport layer 15;

[0108] S14. Use the evaporation process in combination with a shadow mask to evaporate an Al grid as the second transparent top electrode 14, thus obtaining the light-emitting display module 3;

[0109] S2. Prepare a double-sided perovskite solar cell module 2:

[0110] S21. Protect and encapsulate one side of the transparent substrate 1 with the light-emitting display module 3, and clean the other side of the transparent substrate 1;

[0111] S22. Use magnetron sputtering to sputter ITO on one side of the substrate as the first transparent electrode conductive layer 9;

[0112] S23. Prepare NiO as the first hole transport layer 12 on the first transparent electrode conductive layer 9 by magnetron sputtering, prepare the FASnI3 perovskite active layer by spin coating, and prepare C60 as the first electron transport layer 10 by thermal evaporation;

[0113] S24. Use magnetron sputtering to prepare the first transparent top electrode 13 with a DMD structure of ITO / Ag / ITO, thus obtaining the double-sided perovskite solar cell module 2;

[0114] S3. Connect the light-emitting display module 3 and the double-sided perovskite solar cell module 2 to the electricity storage unit 8 through the charge and discharge control unit 7, and encapsulate them with the transparent encapsulation module 6, then a transparent display screen with the function of charging by a perovskite solar cell can be obtained.

[0115] As the fourth embodiment of the present invention, as Figure 1 and Figure 5 shown, the double-sided perovskite solar cell module 2 is a formal structure, and the light-emitting display module 3 is an inverted structure.

[0116] The double-sided perovskite solar cell includes a first transparent electrode conductive layer 9, a first electron transport layer 10, a perovskite photoactive layer 11, a first hole transport layer 12, and a first transparent top electrode 13 stacked in sequence; the light-emitting display module 3 includes a second transparent electrode conductive layer 18, a second electron transport layer 15, a light-emitting display screen 16, a second hole transport layer 17, and a second transparent top electrode 14 stacked in sequence.

[0117] In this embodiment, the preparation processes of the double-sided perovskite solar cell module 2 and the light-emitting display module 3 are as follows:

[0118] S1. Prepare the light-emitting display module 3:

[0119] S11. Clean and dry the transparent glass substrate, and perform ultraviolet ozone treatment or plasma treatment;

[0120] S12. Use magnetron sputtering to sputter ITO on one side of the substrate as the second transparent electrode conductive layer 18;

[0121] S13. Use spin coating to prepare PEDOT:PSS on the second transparent electrode conductive layer 18 as the second hole transport layer 17. According to different mask patterns, spin coat InP / ZnSe / ZnS, InP / GaP / ZnS, and InP / ZnS red, green, and blue quantum dots as the light-emitting display screen 16, and then spin coat ZnO as the second electron transport layer 15;

[0122] S14. Use evaporation process in combination with a mask to evaporate an Ag grid as the second transparent top electrode 14, thus obtaining the light-emitting display module 3;

[0123] S2. Prepare a double-sided perovskite solar cell module 2:

[0124] S21. Protect and encapsulate the side of the transparent substrate 1 with the light-emitting display module 3, and clean the other side of the transparent substrate 1;

[0125] S22. Use magnetron sputtering to sputter ITO on one side of the substrate as the first transparent electrode conductive layer 9;

[0126] S23. Use spin coating to prepare SnO2 on the first transparent electrode conductive layer 9 as the first electron transport layer 10, use spin coating to prepare the MA0.1FA0.9PbI3 perovskite active layer, and use thermal evaporation to prepare Spiro-oMeTAD as the first hole transport layer 12;

[0127] S24. Use magnetron sputtering to prepare the DMD structure first transparent top electrode 13 of ITO / Ag / ITO, thus obtaining the double-sided perovskite solar cell module 2;

[0128] S3. Connect the light-emitting display module 3 and the double-sided perovskite solar cell module 2 to the electricity storage unit 8 through the charge and discharge control unit 7, and encapsulate them with the transparent encapsulation module 6, then a transparent display screen with the function of perovskite solar cell charging can be obtained.

[0129] In some embodiments of the present invention, the structure of the perovskite photoactive layer 11 is ABX3, where A is one or more of Cs, MA, and FA, B is one or more of Pb, Sn, Ge, Bi, In, and Sb, and X is one or more of I, Br, and Cl. The diversity and tunability of this structure bring many beneficial effects to the perovskite photoactive layer, mainly including that the perovskite material has excellent light absorption ability and charge transport performance, and can achieve high photoelectric conversion efficiency. By selecting appropriate combinations of ions at the A, B, and X positions, the energy band structure can be further optimized, the light absorption efficiency and carrier mobility can be improved, and thus the photoelectric performance of the device can be enhanced.

[0130] In some embodiments of the present invention, the light-emitting display screen 16 includes red, green, and blue primary color modules, and the materials thereof are one or more of cadmium-based quantum dots, indium phosphide-based quantum dots, zinc selenide-based quantum dots, zinc sulfide quantum dots, copper indium sulfide quantum dots, silver indium sulfide quantum dots, perovskite quantum dots, and organic light-emitting materials. These materials can provide the three primary colors of red, green, and blue, ensuring the color richness and accuracy of the display device. Through precise color mixing and combination, high color saturation and wide color gamut can be achieved, bringing a more real and vivid visual experience to users. Moreover, these quantum dot materials and organic light-emitting materials usually have high luminous efficiency and can achieve high-brightness light emission at a lower voltage or current, so as to better serve as the light source of the perovskite solar cell to achieve self-power supply of the display screen.

[0131] In some embodiments of the present invention, the materials of the first transparent electrode conductive layer 9 and the second transparent electrode conductive layer 18 are one or more of indium tin oxide, fluorine-doped tin oxide, and aluminum-doped zinc oxide;

[0132] The materials of the first transparent top electrode 13 and the second transparent top electrode 14 are transparent copper grids, transparent silver grids, or transparent electrodes with a dielectric / metal / dielectric structure.

[0133] These materials all have good visible light transmittance and conductivity. Among them, the transmittance of ITO and FTO in the visible light wavelength range can reach more than 85%, and at the same time, they have good conductivity, which is particularly important for devices that need to meet both transparent and conductive requirements (such as touch screens, solar cells, etc.). Moreover, by adjusting the composition and preparation process of the materials, their optoelectronic properties can be further optimized.

[0134] Moreover, for the selection of the materials of the first transparent top electrode 13 and the second transparent top electrode 14, although copper and silver are metals, through fine grid design and manufacturing technology, it can be ensured that the electrodes still have good transparency while maintaining high conductivity; in addition, the transparent electrode with a metal / dielectric structure has excellent transparency and good conductivity. Through the use of transparent dielectric materials and fine metal layers, the D / M / D structure can ensure that the electrodes maintain high transparency in a wide wavelength range. At the same time, the metal layer provides the necessary conductivity, while the dielectric layer helps to protect the metal layer from oxidation or damage.

[0135] In some embodiments of the present invention, the materials of the first electron transport layer 10 are one or more of SnO2, TiO2, ZnS, PCBM, C60, and ICBA, which helps to achieve efficient charge transport and collection.

[0136] The material of the first hole transport layer 12 is one or more of PEDOT:PSS, Spiro-OMeTAD, PTAA, NiOx, TPE, P3TH, CuSCN, all of which can achieve good conductivity and light transmittance, ensure the extraction rate and mobility of holes, thereby improving the performance of the device and increasing the photoelectric conversion efficiency.

[0137] The material of the second electron transport layer 15 is one or more of ZnO, yttrium-doped ZnO, lithium-doped ZnO, fluorine-doped ZnO, Alq3, Almq3, DVPBi, TAZ, OXD, PBD, BND; among them, =12 has excellent conductivity, which can help electrons to be quickly transported in the solar cell, reduce the electron generation and recombination effect, thereby increasing the efficiency of the solar cell; by doping different elements, such as yttrium, lithium and fluorine, the electron transport performance of =12 can be further adjusted. These dopants can change the energy band structure, conductivity and mobility of =12 and other properties to meet different application requirements; Alq3, Almq3, DVPBi, TAZ, OXD, PBD, BND all have good electron transport performance and stability, or can be combined and optimized with materials such as =12 to further improve the performance and stability of optoelectronic devices, and can also help electrons to be quickly transported to the electrode, increasing the photoelectric conversion efficiency of the battery.

[0138] The material of the second hole transport layer 17 is one or more of PEDOT:PSS, PVK, TPD, NPB, CBP, TCTA, HAT-CN, MoOx. These materials all have good hole transport performance and excellent film-forming properties, which are beneficial to improving the interfacial contact between devices. Among them, PEDOT:PSS as the hole transport layer can effectively transport the photo-generated holes from the active layer to the electrode, while ensuring that sunlight can fully penetrate into the active layer; PVK has good hole transport performance and good film-forming properties, and it can be blended with other materials: PVK can be blended with other materials (such as TAPC) for use to optimize the device performance. PVK is also easy to form a uniform and smooth film, which is beneficial to improving the interfacial contact of the device, and is suitable for the integration of double-sided perovskite solar cell modules and light-emitting display modules, and even transparent display screens, to reduce the thickness of the transparent display screen; TPD has good hole transport performance.

[0139] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A transparent display screen with a perovskite solar cell charging function, characterized in that: A transparent substrate is included, wherein a light-emitting display module and a double-sided perovskite solar cell module are respectively arranged on the upper and lower sides of the transparent substrate, the light-emitting display module and the double-sided perovskite solar cell module share the same transparent substrate, and a touch screen, a polarizer and a transparent packaging module are stacked on the light-emitting display module; The light-emitting display module and the double-sided perovskite solar cell module are also respectively connected to the same charge and discharge control unit, and the charge and discharge control unit is also connected to a power storage unit.

2. The transparent display screen with perovskite solar cell charging function according to claim 1, characterized in that: The double-sided perovskite solar cell module comprises a first transparent electrode conductive layer, a first electron transport layer, a perovskite photoactive layer, a first hole transport layer, and a first transparent top electrode which are stacked; The light-emitting display module comprises a second transparent electrode conductive layer, a second hole transport layer, a light-emitting display screen, a second electron transport layer and a second transparent top electrode which are stacked.

3. The transparent display screen with perovskite solar cell charging function according to claim 2, characterized in that: The double-sided perovskite solar cell module is a regular structure or a reverse structure, and / or the light-emitting display module is a normal structure or an inverted structure.

4. The transparent display screen with perovskite solar cell charging function according to claim 3, characterized in that: When the double-sided perovskite solar cell is a formal structure, the double-sided perovskite solar cell includes the first transparent electrode conductive layer, the first electron transport layer, the perovskite photoactive layer, the first hole transport layer and the first transparent top electrode which are stacked in sequence; When the double-sided perovskite solar cell is a transverse structure, the double-sided perovskite solar cell includes the first transparent electrode conductive layer, the first hole transport layer, the perovskite photoactive layer, the first electron transport layer and the first transparent top electrode which are sequentially stacked; When the light-emitting display module is in a positive structure, the light-emitting display module includes the second transparent electrode conductive layer, the second hole transport layer, the light-emitting display screen, the second electron transport layer and the second transparent top electrode which are stacked in sequence; When the light-emitting display module is an inverted structure, the light-emitting display module includes the second transparent electrode conductive layer, the second electron transport layer, the light-emitting display screen, the second hole transport layer and the second transparent top electrode which are stacked in sequence.

5. The transparent display screen with perovskite solar cell charging function according to claim 2, characterized in that: The first transparent electrode conductive layer and the transparent top electrode in the double-sided perovskite solar cell module are respectively connected to the second transparent electrode conductive layer and the second transparent top electrode in the light-emitting display module through the charge and discharge control unit.

6. The transparent display screen with perovskite solar cell charging function according to claim 2, characterized in that: The structure of the perovskite photoactive layer is ABX3, A is one or more of Cs, MA, FA, B is one or more of Pb, Sn, Ge, Bi, In, Sb, and X is one or more of I, Br, Cl.

7. The transparent display screen with perovskite solar cell charging function according to claim 2, characterized in that: The light-emitting display screen includes red, green and blue primary color modules, and its materials are one or more of cadmium-based quantum dots, indium phosphide-based quantum dots, zinc selenide-based quantum dots, zinc sulfide quantum dots, copper indium sulfide quantum dots, silver indium sulfide quantum dots, perovskite quantum dots, and organic light-emitting materials.

8. The transparent display screen with perovskite solar cell charging function according to claim 2, characterized in that: The material of the first transparent electrode conductive layer and the second transparent electrode conductive layer is one or more of indium tin oxide, fluorine-doped tin oxide, and aluminum-doped zinc oxide; The materials of the first transparent top electrode and the second transparent top electrode are a transparent copper grid, a transparent silver grid or a transparent electrode of a dielectric / metal / dielectric structure.

9. The transparent display screen with perovskite solar cell charging function according to claim 2, characterized in that: The material of the first electron transport layer is one or more of SnO2, TiO2, ZnS, PCBM, C60, and ICBA; The material of the first hole transport layer is one or more of PEDOT:PSS, Spiro-OMeTAD, PTAA, NiOx, TPE, P3TH, and CuSCN; The material of the second electron transport layer is one or more of ZnO, yttrium-doped ZnO, lithium-doped ZnO, fluorine-doped ZnO, Alq3, Almq3, DVPBi, TAZ, OXD, PBD, and BND; The material of the second hole transport layer is one or more of PEDOT:PSS, PVK, TPD, NPB, CBP, TCTA, HAT-CN, and MoOx.

10. A method for preparing a transparent display screen with a perovskite solar cell charging function, characterized in that: The preparation of a transparent display screen with a perovskite solar cell charging function as claimed in any one of claims 1 to 9 comprises the following steps: S1. Preparation of light-emitting display module: S11, cleaning and drying the transparent substrate, and performing ultraviolet ozone treatment or plasma treatment; S12, sputtering a second transparent electrode conductive layer on one side of the transparent substrate by a magnetron sputtering method; S13, sequentially preparing a second hole transport layer, a light-emitting display screen, and a second electron transport layer on the second transparent electrode conductive layer by spin coating, thermal evaporation, or magnetron sputtering, or sequentially preparing a second electron transport layer, a light-emitting display screen, and a second hole transport layer; S14, preparing a second transparent top electrode by thermal evaporation or magnetron sputtering, thereby obtaining a light-emitting display module; S2. Preparation of solar cell module: S21, encapsulating and protecting the side of the transparent substrate provided with the light-emitting display module, and cleaning the other side of the transparent substrate; S22, sputtering a first transparent electrode conductive layer on one side of the transparent substrate by a magnetron sputtering method; S23, sequentially preparing a first hole transport layer, a perovskite photoactive layer, and a first electron transport layer on the transparent electrode conductive layer by spin coating, blade coating, slit coating, thermal evaporation, or magnetron sputtering, or sequentially preparing a first electron transport layer, a perovskite photoactive layer, and a first hole transport layer; S24, preparing a first transparent top electrode by thermal evaporation or magnetron sputtering, thereby obtaining a solar cell module; S3, connecting the light-emitting display module and the solar cell module to the power storage unit through a charge and discharge control unit, and encapsulating them with a transparent encapsulation module, thereby obtaining a transparent display screen with a perovskite solar cell charging function.

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