Mobile phone shell with gear reel type perovskite solar cell part

Abstract

The utility model belongs to the technical field of mobile phone accessories, and particularly relates to a mobile phone shell with a gear reel type perovskite solar cell part. The end part of the mobile phone shell frame body is provided with the solar thin-film battery wound on the reel, so that when the solar thin-film battery is driven, slides or pulled outwards, the light receiving area of the solar thin-film battery can be effectively expanded; the problems that the mobile phone is difficult to charge in a special scene and the solar mobile phone is small in light receiving area, low in charging power and the like are greatly solved; according to the mobile phone shell, electric energy is supplemented through solar power generation, so that the energy density of a mobile phone battery does not need to be improved, the weight and the size of a mobile phone are not increased, the portability of the mobile phone is not lost, and the requirement of a user for conveniently using the mobile phone in a natural environment is met; the perovskite solar cell also has the advantages of small mass, small thickness, bendability, good flexibility, simple manufacturing process and the like, is very suitable for being used in cooperation with a mobile phone shell, and can be popularized and applied in a large scale.

Description

Technical Field

[0001] The utility model belongs to the technical field of mobile phone accessories, and particularly relates to a mobile phone case with a gear scroll type perovskite solar cell part. Background Art

[0002] With the development of the economy, mobile phones have become an indispensable part of people's work and life. It is no longer limited to communication functions, but also has various functions such as work and entertainment applications. However, due to its lightweight design requirements, it is often difficult to have a large-capacity battery or energy storage component, resulting in a short standby time of the mobile phone and difficulty in meeting long-term use.

[0003] The existing technologies mainly improve the standby time and battery life of mobile phones by increasing the energy density of the battery or developing new energy storage technologies. However, the existing technical solutions still have some problems and limitations: First, increasing the energy density of the battery often increases the weight and volume of the mobile phone, affecting its portability; Second, it is not practical to replace the battery with a large capacity and matching the mobile phone for the purchased mobile phone. Moreover, most of the existing mobile phone accessories such as mobile phone cases only have the functions of protection or decoration, and generally have problems such as single function, limited use scenarios of the mobile phone, and no practical effect; thus, more and more mobile phone users have expectations for mobile phone cases and other accessories with more functions. In addition, the existing mobile phones and their accessories are small in volume and can only install small-area solar cell components, making it difficult to install large-area solar cell components, greatly limiting the charging efficiency and making it difficult to meet the actual demand for charging the mobile phone.

[0004] Therefore, the above situation results in a lack of solar mobile phone accessories with multiple functions and effective charging power on the market, making it impossible to effectively solve the problem of using mobile phones easily and safely in the natural environment.

[0005] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0006] The purpose of the present utility model is to overcome the above-mentioned disadvantages of the existing technologies and provide a mobile phone case with a gear scroll type perovskite solar cell part.

[0007] To achieve the above purpose, the present utility model provides the following technical solutions:

[0008] On the one hand, the present utility model provides a mobile phone case with a gear scroll type perovskite solar cell part, including:

[0009] A mobile phone case frame body, and a scroll is provided at an end of the mobile phone case frame body away from the mobile phone charging port, and both ends of the scroll are rotatably fixed on both sides of the mobile phone case frame body;

[0010] A gear assembly, which is fixed on the outer side of the mobile phone case frame and fixedly connected to one end of the reel to drive the reel to rotate;

[0011] A perovskite solar cell part, which includes perovskite solar cells. The perovskite solar cells are wound around the reel, and a charging part for charging the mobile phone is also provided on the perovskite solar cells.

[0012] Specifically, the reel is rotatably fixed inside the reel box body. The reel box body is fixedly connected to the end of the mobile phone case frame, and the reel box body is also provided with a gap to facilitate the sliding and extraction of the perovskite solar cells.

[0013] Specifically, the gear assembly includes a gear box housing, which is fixed on one side of the mobile phone case frame close to the reel. A double gear is rotatably fixed inside the gear box housing. The double gear includes a large gear and a second small gear. One end of the reel, and located outside the mobile phone case frame, is fixed with a first small gear meshing with the large gear. A driving gear for driving the second small gear to rotate is also fixed inside the gear box housing. Part of the teeth of the driving gear protrude from the gear box housing to facilitate finger-driven rotation.

[0014] Specifically, the materials of the mobile phone case frame, the reel, the gear box housing, and the reel box body include but are not limited to plastics, thermoplastic polyurethane elastomer rubbers, polyurethanes, or / and polycarbonate composite materials.

[0015] Specifically, the charging part includes an electrode connecting body connected to the electrodes of the perovskite solar cells, and a charging head elastically connected to the electrode connecting body, or the charging part is a wireless charging device; the electrode connecting body is connected to the cathode and anode electrodes of the perovskite solar cells.

[0016] Specifically, the perovskite solar cells include multiple perovskite solar sub-cells folded together. The perovskite solar sub-cells are connected by a flexible structure. After unfolding, the multiple perovskite solar sub-cells form a larger light-receiving area to improve the charging efficiency of the mobile phone; the multiple perovskite solar sub-cells are connected in series and parallel by wires.

[0017] Specifically, a metal rod is provided at one end of the perovskite solar cell away from the reel, and a magnetic strip for adsorbing the metal rod is provided at one end of the mobile phone case frame away from the reel. The magnetic strip is a permanent magnetic strip, and the metal rod is a steel metal rod.

[0018] Specifically, the mobile phone case frame is also provided with parallel grooves for facilitating the sliding of the metal rod, and the parallel grooves are correspondingly arranged with the gaps on the reel box body.

[0019] Specifically, the perovskite solar cell is a perovskite solar flexible thin film with a thickness less than 0.3 mm and a bending radius less than 2 mm.

[0020] Specifically, the perovskite solar flexible thin film includes a light absorption layer, an electron transport layer, a perovskite layer, a hole transport layer, a cathode electrode layer, and an anode electrode layer.

[0021] The light absorption layer is mostly formed by depositing a transparent conductive material on transparent glass, with a thickness of about 1 μm; the electron transport layer has a thickness of about 20–200 nm; the perovskite layer is the main material of the solar cell, with a thickness of about 200–800 nm; the hole transport layer has a thickness of about 50–200 nm; and the metal electrode layer has a thickness of about 80–150 nm.

[0022] The perovskite solar cell is a flexible thin film, so the transparent conductive glass used for the battery substrate is flexible glass, which is a bendable glass with a thickness of 0.03 mm - 2 mm. Generally, the flexible glass represented by Corning has a thickness of about 0.1 mm and is attached with a layer of laminated polymer plastic, which can make the glass bend without breaking. In the future, ultra-thin flexible glass with a thickness less than 0.03 mm may also be widely used. These glasses have good flexibility and a thickness closer to that of a plastic film.

[0023] Specifically, the light absorption layer includes but is not limited to at least one of methylammonium lead iodide (CH3NH3PbI3), methylammonium lead bromide (CH3NH3PbBr3), cesium lead chloride (CsPbCl3), cesium lead bromide (CsPbBr3), cesium lead bromochloride (CsPbBr x Cl 3-x ), lead sulfide (PbS); the electron transport layer includes but is not limited to at least one of TiO2, SnO2, methylfullerene (PCBM); the hole transport layer includes but is not limited to at least one of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS), poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), NiO x , Spiro-OMeTAD; the cathode electrode layer is a transparent conductive oxide electrode for collecting mobile free electrons, including but not limited to at least one of titanium oxide (TiO2), zinc oxide (ZnO), and vanadium pentoxide (V2O5); the cathode electrode layer is a metal electrode for collecting mobile free holes, including but not limited to at least one of gold, aluminum, silver, and copper;

[0024] Specifically, the perovskite solar thin film battery further has at least one of a first passivation layer, a second passivation layer, and an outer protective layer;

[0025] The first passivation layer includes but is not limited to at least one of cystamine dihydrochloride (CMDR) with double amino groups, amino acid L-aspartic acid (LAA), histidine, poly-4-vinylpyridine (P4VP), ethylenediamine dihydroiodide (EDAI2), and hexamethylene diisocyanate (HDI); the second passivation layer includes but is not limited to at least one of tetrabutylammonium chloride (TBAC), hexadecyltrimethylammonium hexafluorophosphate (HTAP), inorganic potassium fluoride (KF), and trimethylsulfonium bromide (TMSBr); the outer protective layer includes but is not limited to plastics.

[0026] Specifically, the perovskite solar cell is a normal-type perovskite solar cell or an inverted-type perovskite solar cell.

[0027] On the other hand, the present invention also provides a method for using a mobile phone case with a gear scroll type perovskite solar cell part, which is specifically as follows:

[0028] First, the user holds the mobile phone case and fixes the mobile phone inside the case. The index finger pushes the driving gear to rotate inside the gearbox housing through the tooth end of the driving gear exposed in the gearbox housing. Since the tooth part of the driving gear meshes with the second pinion, and the second pinion is fixed to the large gear, the driving gear drives the second pinion and the large gear to rotate; since the first pinion fixed to one end of the scroll meshes with the large gear, the large gear rotation drives the scroll to rotate; since one end of the perovskite solar cell is fixed to the scroll and the perovskite solar cell is wound around the scroll, the metal rod provided at the other end of the perovskite solar cell can slide in the parallel groove of the mobile phone case frame; the gear assembly structure makes the rotation of the gear and the sliding process of the perovskite solar cell have a certain damping.

[0029] When the driving gear rotates inside the gearbox housing, the rotation of the scroll will drive the perovskite solar cell to slide downward from the gap. Since the perovskite solar cell is wound around the scroll, the distance between them and the parallel groove of the mobile phone case frame is very small, which can prevent the perovskite solar cell from overlapping and jamming during the movement, and will make the perovskite solar cell completely cover the mobile phone. At the same time, since there is a magnetic strip at the place where the end of the mobile phone case frame close to the charging port contacts the metal rod, the metal rod can be firmly adsorbed on the magnetic strip, thus ensuring that the perovskite solar cell will not move easily;

[0030] Further, it is also possible to continue pulling or drive the perovskite solar cell to slide out and lengthen until all the perovskite solar cells in the reel are fully deployed, so that the perovskite solar cell has a larger area for receiving light. Similarly, when the phone does not need to be charged, use your finger to drive the driving gear to rotate inside the gearbox housing, thereby driving the reel to rotate, causing the perovskite solar cell to automatically retract upward and tightly wind around the reel.

[0031] Compared with the prior art, the technical solution provided by the present utility model has the following beneficial effects:

[0032] 1) The end of the mobile phone case frame of the present utility model is provided with a solar thin film battery wound around a reel. When the solar thin film battery is driven, slid or pulled outwards, the light receiving area of the solar thin film battery can be effectively expanded, greatly solving the problems of difficult mobile phone charging in special scenarios, small light receiving area of solar mobile phones, low charging power, etc.

[0033] 2) The present utility model winds the solar thin film battery around the reel for storage, and when in use, it is driven, slid or pulled outwards, which overall improves the practicality of the mobile phone case and also enables the mobile phone case to have a more practical function in addition to protecting the mobile phone and decoration.

[0034] 3) The mobile phone with a wheel reel type perovskite solar mobile phone case supplements electric energy through solar power generation, so there is no need to increase the energy density of the mobile phone battery. In this way, neither the weight nor the volume of the mobile phone is increased, and the portability of the mobile phone is not lost, effectively solving the problems of the mobile phone not being light and the limited use scenarios, and meeting the user's need to conveniently use the mobile phone in the natural environment.

[0035] 4) Further, the perovskite solar thin film battery also has the advantages of small mass, thin thickness, bendable, good flexibility, simple manufacturing process, etc., and is very suitable for use with mobile phone cases and can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principles of the present utility model.

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0039] Figure 2Schematic diagram of the structure for removing the upper cover plate of the gearbox and the reel cover plate of the present utility model;

[0040] Figure 3 is Figure 2 cross-sectional view of;

[0041] Figure 4 Schematic diagram of the gear assembly structure of the present utility model;

[0042] Figure 5 Schematic diagram of the structure of the deployable perovskite solar thin film battery of the present utility model.

[0043] Wherein: 1 is the mobile phone case frame body; 2 is the reel; 3 is the gear assembly; 31 is the gearbox housing; 32 is the driving gear; 33 is the double gear; 331 is the second small gear; 332 is the large gear; 34 is the first small gear; 35 is the through hole; 36 is the upper cover plate of the gearbox; 37 is the lower cover plate of the gearbox; 4 is the perovskite solar cell; 5 is the metal rod; 6 is the magnetic strip; 7 is the reel box body; 8 is the charging part; 81 is the electrode connector; 82 is the charging head. Detailed implementation manners

[0044] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present utility model. On the contrary, they are only examples consistent with some aspects of the present utility model detailed in the appended claims.

[0045] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0046] Embodiment

[0047] Referring to Figures 1-5 as shown, this embodiment provides a mobile phone case with a gear reel type perovskite solar cell part, including:

[0048] The mobile phone case frame body 1, at the end of the mobile phone case frame body 1 away from the mobile phone charging port, there is a reel 2, and both ends of the reel 2 are rotatably fixed on both sides of the mobile phone case frame body 1;

[0049] The gear assembly 3, the gear assembly 3 is fixed on the outside of the mobile phone case frame body 1 and is fixedly connected to one end of the reel 2 to drive the reel 2 to rotate;

[0050] The perovskite solar cell part, the perovskite solar cell part includes a perovskite solar cell 4, the perovskite solar cell 4 is wound around the reel 2, and a charging part 8 for charging the mobile phone is further provided on the perovskite solar cell 4.

[0051] Specifically, the reel 2 is rotatably fixed within the reel box body 7, the reel box body 7 is fixedly connected to the end of the mobile phone case frame body 1, and the reel box body 7 is also provided with a gap facilitating the sliding extraction of the perovskite solar cell 4.

[0052] Specifically, the gear assembly 3 includes a gearbox housing 31, the gearbox housing 31 is fixed to one side of the mobile phone case frame body 1 close to the reel 2, a double gear 33 is rotatably fixed within the gearbox housing 31, the double gear 33 includes a large gear 332 and a second small gear 331, one end of the reel 2 and located outside the mobile phone case frame body 1 is fixed with a first small gear 34 meshing with the large gear 332, a driving gear 32 for driving the rotation of the second small gear 331 is also fixed within the gearbox housing 31, or a driving motor, a part of the teeth of the driving gear 32 extends out of the gearbox housing 31 for facilitating finger-driven rotation, or the reel is driven to rotate by the forward or reverse rotation of the driving motor, the gear assembly is provided with a micro power source for supplying power to the motor, and the micro power source is powered by the perovskite solar cell 4; a button for controlling the forward or reverse rotation of the driving motor is also provided on the gearbox housing 31.

[0053] Specifically, the materials of the mobile phone case frame body 1, the reel 2, the gearbox housing 31 and the reel box body 7 include but are not limited to plastics, thermoplastic polyurethane elastomer rubbers, polyurethanes or / and polycarbonate composite materials.

[0054] Specifically, the charging part 8 includes an electrode connecting body 81 connected to the electrodes of the perovskite solar cell 4, and a charging head 82 elastically connected to the electrode connecting body 81, or the charging part is a wireless charging device; the electrode connecting body 81 is connected to the cathode and anode electrodes of the perovskite solar cell 4.

[0055] Specifically, the perovskite solar cell 4 includes multiple perovskite solar sub-cells folded together, and after folding, they are wound and stored on the reel 2. When in use, they are drawn out from the reel box body 7. The perovskite solar sub-cells are connected by a flexible structure to prevent breakage after multiple foldings and affect use. Then, the multiple perovskite solar sub-cells are unfolded to form a larger light-receiving area to improve the charging efficiency of the mobile phone; the multiple perovskite solar sub-cells are connected in series and parallel by wires; see Figure 5 as shown.

[0056] Specifically, a metal rod 5 is provided at one end of the perovskite solar cell 4 away from the reel 2, and a magnetic strip 6 for adsorbing the metal rod 5 is provided at one end of the mobile phone case frame body 1 away from the reel 2. The magnetic strip 6 is a permanent magnetic strip, and the metal rod 5 is a steel metal rod.

[0057] Specifically, the mobile phone case frame 1 is further provided with parallel grooves facilitating the sliding of the metal rod 5, and the parallel grooves are correspondingly arranged with the gaps on the reel box body.

[0058] Specifically, the perovskite solar cell 4 is a perovskite solar flexible thin film with a thickness less than 0.3 mm and a bending radius less than 2 mm.

[0059] Specifically, the perovskite solar flexible thin film includes a light absorption layer, an electron transport layer, a perovskite layer, a hole transport layer, a cathode electrode layer, and an anode electrode layer.

[0060] Specifically, the light absorption layer includes but is not limited to at least one of methylammonium lead iodide (CH3NH3PbI3), methylammonium lead bromide (CH3NH3PbBr3), cesium lead chloride (CsPbCl3), cesium lead bromide (CsPbBr3), cesium lead bromochloride (CsPbBr x Cl 3-x ), lead sulfide (PbS); the electron transport layer includes but is not limited to at least one of TiO2, SnO2, and methyl fullerenes (PCBM); the hole transport layer includes but is not limited to at least one of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), NiO x , and Spiro-OMeTAD; the cathode electrode layer is a transparent conductive oxide electrode for collecting mobile free electrons and includes but is not limited to at least one of titanium oxide (TiO2), zinc oxide (ZnO), and vanadium oxide (V2O5); the anode electrode layer is a metal electrode for collecting mobile free holes and includes but is not limited to at least one of gold, aluminum, silver, and copper;

[0061] Specifically, the perovskite solar thin film battery further has at least one of a first passivation layer, a second passivation layer, and an outer protective layer;

[0062] The first passivation layer includes but is not limited to at least one of cystamine dihydrochloride (CMDR) with diamino groups, amino acid L-aspartic acid (LAA), histidine, poly-4-vinylpyridine (P4VP), ethylenediamine dihydroiodide (EDAI2), and hexamethylene diisocyanate (HDI); the second passivation layer includes but is not limited to at least one of tetrabutylammonium chloride (TBAC), hexadecyltrimethylammonium hexafluorophosphate (HTAP), inorganic potassium fluoride (KF), and trimethylsulfonium bromide (TMSBr); the outer protective layer includes but is not limited to plastic.

[0063] Specifically, the perovskite solar cell is a perovskite solar cell with a normal p-i-n structure or an inverted n-i-p structure.

[0064] On the other hand, this embodiment also provides a method for using a mobile phone case with a gear scroll type perovskite solar cell part, which is as follows:

[0065] First, the user holds the mobile phone case and fixes the mobile phone inside the case. The index finger pushes the driving gear 32 to rotate inside the gearbox housing 31 through the exposed tooth end of the driving gear 32 in the gearbox housing 31. Since the tooth part of the driving gear 32 meshes with the second pinion 331, and the second pinion 331 is fixed to the large gear 332, the driving gear 32 drives the second pinion 331 and the large gear 332 to rotate. Since the first pinion 34 fixed to one end of the scroll 2 meshes with the large gear 332, the large gear 332 rotates to drive the scroll 2 to rotate. Since one end of the perovskite solar cell 4 is fixed to the scroll 2 and the perovskite solar cell 4 is wound around the scroll 2, the metal rod 5 provided at the other end of the perovskite solar cell 4 can slide in the parallel groove of the mobile phone case frame 1. The gear assembly structure makes the gears have a certain damping during rotation and the perovskite solar cell 4 has a certain damping during sliding.

[0066] When the driving gear 32 rotates inside the gearbox housing 31, the rotation of the scroll 2 drives the perovskite solar cell 4 to slide downward from the gap. Since the perovskite solar cell 4 is wound around the scroll 2, the distance between them and the parallel groove of the mobile phone case frame 1 is very small, which can prevent the perovskite solar cell 4 from overlapping and jamming during movement, and will make the perovskite solar cell 4 completely cover the mobile phone. At the same time, since there is a magnetic strip 6 at the place where the end of the mobile phone case frame 1 near the charging port contacts the metal rod 5, the metal rod 5 can be firmly adsorbed on the magnetic strip 6, thus ensuring that the perovskite solar cell 4 will not move easily.

[0067] Furthermore, it is also possible to continue to pull or drive the perovskite solar cell 4 to slide out and become longer until all the perovskite solar cells 4 in the scroll are pulled out, so that the perovskite solar cell 4 has a larger area for receiving light. Similarly, when it is not necessary to charge the mobile phone, use a finger to drive the driving gear 32 to rotate inside the gearbox housing 31, thereby driving the scroll 2 to rotate, so that the perovskite solar cell 4 will automatically retract upward and tightly wind around the scroll 2.

[0068] The mobile phone case with a gear scroll type perovskite solar cell part of the present utility model and its various components have preset specifications and dimensions; for example, taking the adaptation of Huawei's Mate series mobile phones as an example here, the dimensions of the various components of the mobile phone case in this solution can be set as follows: the wall thickness of the mobile phone case frame 1 is 0.5 mm; the diameter of the scroll 2 is 12 mm; the length * width * height of the gearbox housing 31 is: 33 * 8 * 16 mm; the thickness of the large gear 332 is 3 mm, the number of teeth is 40, and the module is 0.25; the thickness of the driving gear 32 is 3 mm, the number of teeth is 48, and the module is 0.25; the thickness of the first small gear 34 and the second small gear 331 is 3 mm, the number of teeth is 16, and the module is 0.25; the thickness of the perovskite solar thin film battery 4 is 0.25 mm, the length is 170 mm, and the width is 78.4 mm; the length of the metal rod 5 is 78.6 mm, and the width and height are both 0.5 mm; the length of the magnetic strip 6 is 78 mm, and the width and height are both 1 mm; after all the perovskite solar cells 4 are wound around the scroll 2, the gap between them and the inner surface of the mobile phone case frame 1, and the lower gap with the scroll box body 7 is 0.5 mm, and the gap between other components and the inner surface of the mobile phone case frame 1 is also about 0.5 mm.

[0069] On the other hand, the present embodiment also provides a preparation process for perovskite solar cells, which specifically includes:

[0070] Step 1: Prepare the perovskite thin film;

[0071] First, prepare the perovskite material. Specifically, methylammonium lead iodide (CH3NH3PbI3) can be selected as the perovskite material. This is an organic-inorganic hybrid semiconductor material with a high light absorption coefficient and carrier mobility. Then prepare the perovskite thin film: First, dissolve methylammonium lead iodide in a mixed solution of dimethyl sulfoxide (DMSO) and γ-butyrolactone (GBL) to prepare a precursor solution with a concentration of 1.5 M; then, spin-coat the precursor solution on a pre-cleaned glass substrate at a speed of 3000 rpm for 30 seconds; then, anneal the spin-coated sample on a hot plate at 100 °C for 10 minutes to form a perovskite thin film.

[0072] Step 2: Prepare the perovskite solar cell;

[0073] First, a 100-nm-thick gold layer is vacuum-evaporated on a base surface as the anode; then, a 50-nm-thick poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) layer is spin-coated on the anode as the hole transport layer; next, a perovskite thin film is introduced on the hole transport layer; a 200-nm-thick [6,6]-phenyl C61 butyric acid methyl ester (PCBM) layer is spin-coated on the perovskite thin film as the electron transport layer; finally, a 100-nm-thick aluminum layer is vacuum-evaporated on the electron transport layer as the cathode to form a perovskite thin film solar cell; among them, [6,6]-phenyl C61 butyric acid methyl ester (PCBM) is a methyl fullerene, and its solubility in organic solvents is higher than that of fullerene (C 60 ), PCBM is an n-type semiconductor with a high electron mobility and is the preferred electron transport material.

[0074] Step 3: Test the performance of the perovskite solar cell and form a module;

[0075] First, a solar simulator is used to test the optoelectronic performance of the battery, including open-circuit voltage, short-circuit current, fill factor, and photoelectric conversion efficiency, etc.; then, a universal testing machine is used to test the mechanical performance of the battery, including bending strength, folding angle, and cutting accuracy, etc.; then, an environmental test chamber is used to test the environmental adaptability of the battery, including high temperature, low temperature, high humidity, and ultraviolet aging, etc.; finally, the perovskite solar cells that meet the test standards are cut and encapsulated to form perovskite solar modules.

[0076] Furthermore, the structure, materials, and parameters of the perovskite solar cell enable it to maintain good optoelectronic performance under bending, folding, and cutting conditions. The work on its design, preparation, and optimization includes but is not limited to material selection, structure design, and optimization of the carrier transport layer, etc. In reality, crystals are affected by the growth and subsequent processing processes and will generate defects. For example, the spin-coating preparation process and the post-annealing process of perovskite (PSCs) devices will form various defects on the surface or grain boundaries of polycrystalline perovskite crystals; while positively or negatively charged defects will introduce transition energy levels in the bandgap and may form deep-level defects, which are not conducive to the extraction and migration of carriers in the perovskite thin film, and will also affect the carrier lifetime, which is an important reason for hindering the improvement of VOC (open-circuit voltage) and fill factor (FF) in PSCs. In addition, there are more or less defects in the commonly used electron transport layer (ETL) and hole transport layer (HTL) materials; the present utility model can passivate the defects of each component of PSCs to improve the efficiency and stability of the device, such as improving the carrier extraction efficiency and VOC through the energy level matching between the ETL / perovskite interface; specific passivation strategies include but are not limited to technical means such as interface treatment, introduction of additives, and dopants to improve the overall performance of PSCs.

[0077] More specifically, cystamine dihydrochloride (CMDR) with diamino groups is introduced between the TiO2 ETL and the perovskite layer. The diamino groups of CMDR can form TiN bonds with TiO2 and hydrogen bonds with I- in the perovskite, effectively inhibiting the generation of excessive Pb0 defects in PbI2; oxygen vacancies (VO) and hydroxyl defects on the SnO2 ETL will damage the uniformity of the perovskite thin film. If the multifunctional amino acid L-aspartic acid (LAA) is used to regulate the SnO2 / perovskite interface, the -COOH in LAA can coordinate the mismatched Sn4+ in SnO2, thereby reducing the VO defects in SnO2. At the same time, it can also neutralize the alkalinity of the hydroxyl groups on the SnO2 side; LAA can "connect" the SnO2 / perovskite interface through bilateral synergistic passivation, accelerating electron transfer at the interface and reducing the trap state density at the interface; for example, using multifunctional histidine as a crosslinking agent at the SnO2 ETL / perovskite interface, the strategy of promoting the tight crosslinking of SnO2 and perovskite is beneficial to electron extraction and transfer, improves the quality of the perovskite thin film, and reduces non-radiative recombination between interfaces; the crosslinking agent can also effectively adjust the interface energy level and accelerate electron transfer.

[0078] Furthermore, for perovskite solar cells with a positive p-i-n structure: poly-4-vinylpyridine (P4VP) is introduced as an intermediate layer between the perovskite / [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) interface to passivate the defects located on the surface and grain boundaries. P4VP can effectively regulate the energy level matching of the perovskite / PCBM, facilitating efficient charge extraction between interfaces and inhibiting hole transfer; a passivation strategy based on a dual interface is adopted. On the basis of the already introduced ethylenediamine dihydroiodide (EDAI2) interface passivation layer, a hexamethylene diisocyanate (HDI) interface layer is introduced to further treat the perovskite / PCBM interface; after passivation with EDAI2 / HDI, the recombination at the perovskite / PCBM interface is significantly inhibited and an extremely low non-radiative VOC loss of 0.10 V is obtained; the isocyanate group in the HDI molecule is easily crosslinked with the amine group in EDAI2 even at room temperature, and crosslinked molecules are formed on the perovskite surface, which helps to prevent the diffusion of EDA2+ cations into the perovskite, making the PSCs after EDAI2 / HDI passivation have excellent thermal stability.

[0079] Furthermore, for perovskite solar cells with an inverted n-i-p structure PSCs: the interfacial passivation material should be directly deposited on the perovskite thin film, and the solvent for dissolving the interfacial passivation material must be an inert solvent that does not damage the perovskite thin film; halide anions or pseudohalide anions can chemically react with anion vacancies or cation defects on the surface of the perovskite thin film through ionic bonds or hydrogen bonds, thereby improving the crystallinity of the perovskite thin film. A single layer of tetrabutylammonium chloride (TBAC) was introduced at the perovskite / Spiro-OMeTAD interface using a simple solution method. When TBAC is deposited on the perovskite thin film, the Cl- in TBAC will enter the perovskite lattice by occupying the I- vacancies in the perovskite thin film or acting as an interstitial, which makes TBAC have a strong interfacial dipole pointing to the outer surface of the perovskite, promoting the built-in electric field and reducing the contact barrier for hole extraction at the same time. Coating hexadecyltrimethylammonium hexafluorophosphate (HTAP) on the top of the perovskite layer achieved a terminal sealing passivation strategy, which can not only provide a good "channel" for hole extraction, but also provide a defect passivation layer for enhancing VOC and FF; PF6- in HTAP can fill the halide anion vacancies on the perovskite thin film and can anchor the uncoordinated Pb2+, which helps to improve the crystallization and morphology of the perovskite thin film; the sealing passivation strategy also effectively alleviates the problem of lead leakage.

[0080] Furthermore, when passivating the perovskite / HTL interface in the p-i-n structure, poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) is one of the most commonly used HTL materials for planar p-i-n structure PSCs; due to its high carrier mobility and high transmittance, NiO x becomes a commonly used HTL in p-i-n structure PSCs in addition to PTAA; for example, an inorganic potassium fluoride (KF) interfacial buffer layer was introduced onto the PTAA substrate to adjust the surface energy level difference at the PTAA HTL / perovskite interface. KF is used to effectively reduce the maximum valence band of PTAA, which is beneficial for hole extraction, significantly increasing the recombination resistance at the PTAA / perovskite interface, thereby suppressing the carrier recombination between interfaces; for example, a trimethylsulfonium bromide (TMSBr) interface layer was introduced between the NiO x / perovskite interface by vapor deposition to eliminate the multi-step photodegradation of the NiO x -perovskite heterojunction during device fabrication, and the formation of the PbI2 phase was inhibited through the redox reaction between NiO x and organic iodide salts, which is beneficial for the strain release and extraction of carriers at the NiO x / perovskite interface; the TMSBr interface layer also has lattice parameters matching the perovskite crystal phase and a strong trap passivation ability.

[0081] Furthermore, the additive is used to passivate the defects of the perovskite light-absorbing layer, effectively suppressing SRH non-radiative recombination by improving carrier extraction and transport; the dopant is used to directly introduce the passivator into the perovskite precursor solution, reducing the density of film trap states and suppressing carrier non-radiative recombination. However, this passivation strategy has the risk of introducing impurities into the perovskite crystal, and these impurities will affect the long-range ordered structure of the perovskite crystal; if the passivation site is turned to the carrier transport layer adjacent to the perovskite layer, the dopant engineering of single-element doping of the carrier transport layer can promote the carrier transport rate, adjust the energy level barrier between interfaces, further passivate the perovskite film defects, control the crystallization process of the perovskite film and improve the crystallinity.

[0082] The perovskite solar cell implemented through the content of this embodiment generates electricity using the photovoltaic effect of semiconductors. When an N-type (electron-type semiconductor, i.e., an impurity semiconductor with a free electron concentration much greater than the hole concentration) and a P-type (hole-type semiconductor, a semiconductor mainly conducting with positively charged holes) semiconductor are in contact, due to the difference in the carrier concentration itself, diffusion occurs, an internal built-in electric field is generated at the contact interface, and at the same time, the carriers drift under the action of the electric field. Diffusion and drift reach a dynamic equilibrium, forming a PN junction; under the irradiation of sunlight, the perovskite light-absorbing layer with a high absorption coefficient will absorb a large number of photons with energy greater than or equal to the bandgap width, causing the electrons originally bound around the atomic nucleus to be excited from the valence band top to the conduction band bottom; at the same time, a positively charged hole is additionally generated to maintain electrical neutrality, and this pair of electrons and holes bound by the Coulomb force is an exciton; due to the low exciton binding energy of perovskite, it will quickly dissociate into free electrons and holes under the action of the built-in electric field. Among them, the free electrons are transported to the cathode through the electron transport layer (ETL) and finally collected by the transparent conductive oxide (TCO) electrode; the free holes are transported to the anode through the hole transport layer (HTL) and then collected by the metal electrode; after the external mobile phone circuit is connected to the two electrodes, the component will form a current loop, thereby realizing photoelectric conversion and supplying electrical energy to the mobile phone and its battery.

[0083] More specifically, when the mobile phone case is installed on the mobile phone, the mobile phone case can not only protect the mobile phone, but also generate electricity when the perovskite solar cell 4 on the mobile phone case receives sunlight, and then import the electricity into the mobile phone battery, achieving the purpose of storing electrical energy and extending the battery life of the mobile phone; the perovskite solar cell 4, as a thin-film solar cell, is prepared on a flexible substrate to form a flexible thin-film solar cell. When the flexible thin-film solar cell is installed on the mobile phone case, it hardly increases the weight of the mobile phone case.

[0084] Further, in addition to the above-mentioned charging unit for electrically connecting the perovskite solar cell 4 to charge the mobile phone battery, this embodiment also provides a wireless charging structure, that is, a wireless transmitting coil is provided on the mobile phone case, which is matched with the wireless receiving coil provided in the mobile phone. In addition to the wireless transmitting coil, the perovskite solar cell part of the mobile phone case may further include a rectifying circuit and an inverting circuit. The rectifying circuit is used to output stable direct current, and then the inverting circuit converts the direct current into high-frequency alternating current. Then, through the resonant strong magnetic coupling between the wireless transmitting coil and the wireless receiving coil, a high-frequency alternating current is formed on the wireless receiving coil of the mobile phone, and then it is converted into direct current through the high-frequency rectifying circuit of the internal wireless charging circuit of the mobile phone to charge the battery of the mobile phone; the wireless charging circuit can be provided inside the mobile phone case together with the wireless transmitting coil, or a heat dissipation component layer can be provided or integrated. No specific limitation is made here.

[0085] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0086] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A mobile phone case with a gear scroll type perovskite solar cell part, characterized in that Comprising: A mobile phone case frame (1), at the end of the mobile phone case frame (1) away from the mobile phone charging port, there is a reel (2), and both ends of the reel (2) are rotatably fixed on both sides of the mobile phone case frame (1); A gear assembly (3), the gear assembly (3) is fixed on the outer side of the mobile phone case frame (1) and is fixedly connected to one end of the reel (2) to drive the reel (2) to rotate; A perovskite solar cell part, the perovskite solar cell part includes a perovskite solar cell chip (4), the perovskite solar cell chip (4) is wound around the reel (2), and a charging part (8) for charging the mobile phone is also provided on the perovskite solar cell chip (4).

2. The mobile phone case according to claim 1, wherein, The reel (2) is rotatably fixed inside a reel box body (7), the reel box body (7) is fixedly connected to the end of the mobile phone case frame (1), and the reel box body (7) is also provided with a gap for facilitating the sliding and extraction of the perovskite solar cell chip (4).

3. The mobile phone case according to claim 1, wherein The gear assembly (3) includes a gear box housing (31), the gear box housing (31) is fixed on one side of the mobile phone case frame (1) close to the reel (2), a double - linked gear (33) is rotatably fixed inside the gear box housing (31), the double - linked gear (33) includes a large gear (332) and a second small gear (331), one end of the reel (2) and located outside the mobile phone case frame (1) is fixed with a first small gear (34) meshing with the large gear (332), and a driving gear (32) for driving the second small gear (331) to rotate is also fixed inside the gear box housing (31), and part of the teeth of the driving gear (32) protrude out of the gear box housing (31) for facilitating finger - driven rotation.

4. The mobile phone case according to claim 1, characterized in that, The charging part (8) includes an electrode connecting body (81) connected to the electrodes of the perovskite solar cell chip (4), and a charging head (82) elastically connected to the electrode connecting body (81), or the charging part is a wireless charging device.

5. The mobile phone case according to claim 1, wherein, The perovskite solar cell chip (4) includes multiple perovskite solar sub - cell chips folded together, and the perovskite solar sub - cell chips are connected through a flexible structure; multiple perovskite solar sub - cell chips are connected in series and parallel through wires.

6. The mobile phone case according to claim 1, wherein At one end of the perovskite solar cell chip (4) away from the reel (2), there is a metal rod (5), and at one end of the mobile phone case frame (1) away from the reel (2), there is a magnetic strip (6) for adsorbing the metal rod (5).

7. The mobile phone case according to claim 6, wherein The mobile phone case frame (1) is also provided with parallel grooves for facilitating the sliding of the metal rod (5).

8. The mobile phone case according to any one of claims 1-7, characterized in that, The perovskite solar cell chip (4) is a perovskite solar flexible thin film with a thickness less than 0.3 mm.

9. The mobile phone case according to claim 8, wherein, The perovskite solar flexible thin film includes a light - absorbing layer, an electron - transporting layer, a perovskite layer, a hole - transporting layer, a cathode electrode layer, and an anode electrode layer.

10. The mobile phone case according to claim 8, characterized in that, The layer structure of the perovskite solar cell chip (4) is a normal - type perovskite solar cell structure or an inverted - type perovskite solar cell structure.

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