Perovskite solar mobile phone shell with folding part

Abstract

The utility model provides a perovskite solar cell phone shell with a folding part, which comprises a shell main body, and the shell main body is hinged with the folding part through a hinge part. A perovskite solar energy part is arranged on the shell main body and / or the folding part, and the perovskite solar energy part is used for charging a mobile phone mounted on the shell main body; the folding part is composed of one or more back folding plates, and the perovskite solar energy part is arranged on the shell main body or the folding part in an attaching or integrated preparation mode. According to the utility model, the folding part is used as an expansion part, the foldable and expandable perovskite solar cell phone shell is realized, the area of the solar panel is increased, the charging efficiency of the solar panel is improved, through the design of the hinge part and the buckle, the folding storage of the solar component is realized, the requirement of a user for conveniently using a cell phone in a natural environment is met, and meanwhile, the solar cell phone shell is light, thin, flexible and convenient to use. The manufacturing process is simple and suitable for large-scale application.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar mobile phone cases, and particularly relates to a perovskite solar mobile phone case with a folding part. Background Art

[0002] At present, mobile phones have become an indispensable part of people's lives. They are no longer limited to communication functions but also have various work and entertainment application functions, becoming one of the essential intelligent tools in people's daily lives and work. However, due to the requirement of a lightweight design, mobile phones often have difficulty in having a large-capacity battery or energy storage component, resulting in a short standby time of the device and being difficult to meet the continuous use for a long time.

[0003] Most 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 and limited use scenarios of mobile phones, etc. More and more mobile phone users have more and more practical expectations for accessories such as mobile phone cases. In addition, it is difficult to implement a large-area solar component due to the small volume of mobile phones and their accessories, and the small surface area limits the charging efficiency and it is difficult to meet the actual demand for charging the host mobile phone.

[0004] Some existing solutions are mainly optimized by the idea of solving individual problems separately. For example, by increasing the energy density of the battery, or developing new energy storage technologies to improve the standby time and battery life of the device, or by using accessories such as mobile phone cases to protect and beautify the mobile phone or only having the concept of small-area natural energy utilization or external appearance to gain attention and sales.

[0005] 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 device, affecting the portability of the device; second, no product has been designed yet that can comprehensively solve problems such as lightweight, foldability, battery life, and natural energy charging.

[0006] In view of this, this utility model is specifically proposed. Content of the Utility Model

[0007] The purpose of this utility model is to overcome the above-mentioned shortcomings of the existing technology and provide a perovskite solar mobile phone case with a folding part, including a case main body and a folding part. The case main body is hinged with the folding part through a hinge part, and the folding part is composed of one or more back folding plates; a perovskite solar part is arranged on the case main body and / or the folding part, the perovskite solar part is connected with a charging part, and the perovskite solar part charges the mobile phone installed on the case main body; and the perovskite solar part is arranged on the case main body or the folding part by means of attachment or integrated preparation.

[0008] Further, the folding part is composed of a plurality of back folding plates, and the sides of the plurality of back folding plates are sequentially hinged to form a back folding plate expansion surface for expanding the light receiving area; wherein, the back folding plate of the folding part close to the shell body is hinged to the shell body through a hinge part.

[0009] Further, the perovskite solar part is foldable, one end of which is connected to the shell body and the other end is connected to the folding part.

[0010] Further, the hinge part is composed of a fixing part and a plugging part, and the fixing part and the plugging part are respectively and correspondingly arranged on the shell body and the folding part or two adjacent back folding plates.

[0011] Further, a slot is formed on the side wall of the fixing part, a pressing component is arranged at the upper end of the plugging part, a plug board is arranged on the side surface, and an elastic component is arranged below the pressing component. By pressing the pressing component, the plug board is inserted into or withdrawn from the slot.

[0012] Further, an electrode contact of the perovskite solar part is arranged on the fixing part, and an electrode contact point of the perovskite solar part is correspondingly arranged on the plugging part.

[0013] Further, the plurality of perovskite solar parts are connected in series or in parallel, and a perovskite solar thin film battery with a thickness less than 0.5 mm is arranged on each perovskite solar part.

[0014] Further, the perovskite solar thin film battery at least includes: a metal electrode layer, a hole transport layer, a perovskite layer, an electron transport layer, and a transparent conductive glass layer.

[0015] Further, a snap groove and a snap part are respectively arranged on the corresponding sides of the hinge of the shell body and the folding part. By snapping the snap part into the snap groove, the shell body and the folding part are covered.

[0016] Further, the charging part includes a wired charging part or a wireless charging part arranged on the shell body. One end of the wired charging part is connected to the cathode and anode of the perovskite solar part, and the other end is connected to the mobile phone charging interface; the wireless charging part includes a wireless transmitting coil arranged on the shell body, which is arranged in a matching manner with the wireless receiving coil in the mobile phone.

[0017] Further, the perovskite solar thin film battery is a micron-level thin film or a film structure. Among them, the transparent conductive glass layer is mostly formed by depositing a transparent conductive material on transparent glass, including indium tin oxide (ITO), fluorine-doped tin oxide (FTO), etc., with a thickness of about 1 μm; the composition materials of the electron transport layer are mostly SnO2, C 60, PCBM, etc., with a thickness of about 20–50 nm; the perovskite layer is the main material of the solar cell, with a thickness of about 200–800 nm; the hole transport layer materials are mostly Spiro-OMeTAD, NiOx, PTAA, etc., with a thickness of about 50–200 nm; the materials of the metal electrode layer are Au, Ag, Cu, etc., with a thickness of about 80–150 nm.

[0018] Further, the perovskite solar thin film battery has at least five layers including an absorption layer, an electron transport layer, a hole transport layer, and cathode and anode electrodes, a first passivation layer, a second passivation layer, and an outer protective layer.

[0019] Further, the absorption layer includes at least one of lead methylammonium iodide (CH3NH3PbI3), lead methylammonium bromide (CH3NH3PbBr3), cesium lead chloride (CsPbCl3), cesium lead bromide (CsPbBr3), cesium lead bromochloride (CsPbBrxCl3-x), and lead sulfide (PbS);

[0020] The electron transport layer includes at least one of TiO2, SnO2, and methyl fullerenes (PCBM);

[0021] The hole transport layer includes at least one of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS), poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), NiOx, and Spiro-OMeTAD;

[0022] The cathode is a transparent conductive oxide electrode for collecting mobile free electrons and includes at least one of titanium oxide (TiO2), zinc oxide (ZnO), and vanadium pentoxide (V2O5);

[0023] The anode is a metal electrode for collecting mobile free holes and includes at least one of gold, aluminum, silver, and copper;

[0024] The first passivation layer includes at least one of bis-amino cystamine dihydrochloride (CMDR), amino acid L-aspartic acid (LAA), histidine, poly-4-vinylpyridine (P4VP), ethylenediamine dihydroiodide (EDAI2), and hexamethylene diisocyanate (HDI);

[0025] The second passivation layer includes at least one of tetrabutylammonium chloride (TBAC), hexadecyltrimethylammonium hexafluorophosphate (HTAP), inorganic potassium fluoride (KF), and trimethylsulfonium bromide (TMSBr);

[0026] The outer protective layer is at least one of plastic and glass.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] First of all, by setting the shell body, folding part, hinge part and buckling part, etc., the utility model realizes a foldable and expandable perovskite solar mobile phone shell, which not only realizes the folding and storage of solar components, but also realizes a perovskite solar component with a larger area, improves the area and charging power of the solar panel, and improves the practical function of the mobile phone shell; and the thin-film solar cell as the perovskite solar part has the advantages of small mass, extremely thin thickness, bendable, flexible, simple manufacturing process, etc., and is suitable for being made on the mobile phone shell.

[0029] Secondly, after the mobile phone circuit is connected to the wired charging part arranged on the mobile phone shell of the utility model through the charging interface, and the wired charging part is connected to the battery electrode of the perovskite solar part, a current loop will be formed in the perovskite solar part, thereby realizing photoelectric conversion and supplying electric energy to the mobile phone and its battery, which also makes the mobile phone shell have a more practical function in addition to protecting the mobile phone and decoration; the mobile phone using this mobile phone shell will have the function of generating electricity or storing electricity through solar energy, so that the energy density of the mobile phone battery does not need to be increased, neither increasing the weight and volume of the mobile phone nor losing the portability of the mobile phone, effectively using solar energy to generate electricity or supplement energy for the mobile phone, solving the problems of single function of ordinary mobile phone shells and limited use scenarios of ordinary mobile phones, meeting the user's expectation for a more practical mobile phone shell, and the demand for using the mobile phone conveniently in the natural environment.

[0030] Finally, the manufacturing process of the mobile phone shell of the utility model is simple, and the thin-film structure is especially suitable for being made on the mobile phone shell and is also conducive to large-scale application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principle of the utility model.

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic structural diagram of the perovskite solar mobile phone shell in Embodiment 1 of the utility model;

[0034] Figure 2 It is a schematic structural diagram of the perovskite solar mobile phone shell in Embodiment 2 of the utility model;

[0035] Figure 3 It is a schematic structural diagram of the perovskite solar cell phone case in Embodiment 3 of the present utility model.

[0036] Among them, 1 - cell phone case; 11 - first perovskite solar part; 12 - buckle groove; 13 - fixing part; 2 - folding part; 21 - second perovskite solar part; 22 - buckling part; 22 - inserting part; 3 - hinge part; 31 - fixing part; 32 - inserting part; 4 - wired charging part. Specific embodiments

[0037] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model. On the contrary, they are only examples of devices consistent with some aspects of the present utility model detailed in the appended claims.

[0038] 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.

[0039] Embodiment 1

[0040] The present utility model provides a perovskite solar cell phone case with a folding part. Refer to the attached Figure 1As shown, a perovskite solar cell phone case with a folding part, comprising a case body 1 hinged with a folding part 2 through a hinge part 3; a perovskite solar part is arranged on the case body 1 and / or the folding part 2, and the perovskite solar part charges the mobile phone installed on the case body 1; the folding part 2 is composed of one or more back folding plates, and the perovskite solar part is arranged on the case body 1 or the folding part 2 by means of attachment or integrated preparation. Specifically, in order to distinguish the perovskite solar parts arranged on the case body 1 and the folding part 2, the one arranged on the case body 1 is called the first perovskite solar part 11, and the one arranged on the folding part 2 is called the second perovskite solar part 21. Specifically, it includes: a case body 1, one side of which is provided with a cavity for installing a mobile phone, and the other side is provided with a first perovskite solar part 11; a back folding plate 2, hinged to the side of the case body 1 through a hinge part 3, one side of which is provided with a second perovskite solar part 21, having the same projected area as the case body 1 and serving as an extended substrate for expanding the unfolded surface area of the phone case; a hinge part 3, arranged on the case body 1 and the back folding plate 2, for the folding part 2 to be unfolded or folded with support relative to the case body 1; wherein, the back of the case body 1 is provided with the first perovskite solar part 11 and a charging part 4, and the connecting wire of the wired charging part 4 is telescopic and can be pulled out and drawn in so as to be able to stably plug into the mobile phone charging interface, and no special limitation is made here; one side of the back folding plate 2 is provided with a second perovskite solar part 21, which is connected in series or parallel with the first perovskite solar part 11; one end of the wired charging part 4 is electrically connected to the cathode and anode electrodes of the first perovskite solar part 11, and the other end is used to connect to the mobile phone charging interface to transmit the electric energy converted by the perovskite solar part to the mobile phone charging circuit and its battery.

[0041] Specifically, the shell body 1 and the folding part 2 are separately formed and are inserted or separated through the hinge part 3. Both the first perovskite solar part 11 and the second perovskite solar part 21 include perovskite solar thin-film batteries with a thickness less than 0.5 mm. The perovskite solar thin-film batteries respectively form the first perovskite solar part 11 and the second perovskite solar part 21 by means of adhesion and are integrated with the back surface of the shell body 1 and the inner surface of the folding part 2. A fixing part 31 of the hinge part 3 is provided on the back surface of the shell body 1. A slot is formed on the side wall of the fixing part 31. An inserting part 32 is provided on the back folding plate 2. A pressing component is provided at the upper end of the inserting part 32. A plug board is provided at one end that cooperates with the slot. The plug board is connected to the pressing component. An elastic component is further provided below the pressing component. A upward protrusion is provided at the head of the plug board. Correspondingly, a downward convex rib is provided on the upper wall surface of the slot. By pressing the pressing component, the plug board is inserted into or withdrawn from the slot. The electrode contact of the first perovskite solar part 11 is provided on the fixing part 31, and the electrode contact point of the second perovskite solar part 21 is provided on the inserting part 32.

[0042] More specifically, the wired charging part 4 includes an electrode connection part and a charging connector. The electrode connection part is electrically connected to the cathode and anode electrodes of the first perovskite solar part 11. The charging connector is used to connect to the mobile phone charging interface. The inserting part 32 on the folding part 2 is inserted into the slot of the fixing part 31 of the hinge part 3. The electrode contact on the fixing part 31 is in contact with the electrode contact point on the inserting part 32, which is used to realize the assembly of the shell body and the folding part 2, and the series or parallel connection of the cathode and anode electrodes of the first perovskite solar part 11 and the second perovskite solar part 21. When the folding part 2 is unfolded, the perovskite solar part receives light and converts it into electrical energy.

[0043] More specifically, a buckle groove 12 is provided on the other side of the shell body 1 connected to the folding part 2, and a buckle part 22 is provided on one side of the folding part 2. The buckle part 22 is buckled into the buckle groove 12 to cover the shell body 1 and the folding part 2, and stably close the folding part 2 and the shell body 1. The shell body 1 and the folding part 2 are made of elastic materials; the hinge part 3 and the buckle part 22 have elastic forces; the elastic force of the hinge part 3 is used for the natural folding of the shell body 1 to which the folding part 2 is connected; the elastic force of the buckle part 22 is used for the elastic engagement and release of the shell body 1 and the folding part 2; the engagement of the buckle part 22 and the buckle groove 12 is used for the stable fitting of the folding part 2 and the shell body 1; the release of the buckle part 22 and the buckle groove 12, with a little external force to overcome the elastic force of the hinge part 3, enables the folding part 2 and its second perovskite solar part 21 to unfold for receiving more light for higher-power solar power generation. The hinge part 3 has an elastic force and the opening angle is not less than 180°.

[0044] Specifically, there are at least two hinge parts 3. The fixing part 31 and the insertion part 32 on the hinge part 3 are integrally formed with the shell body 1 and the folding part 2 at the same time; the shell body 1 and its hinge part 3 are formed of rubber material; the insertion part of the folding part 2 is made of plastic and is not easy to break, and can be used for a long time. The shell body 1 and the folding part 2 are easy to disassemble and assemble. The material or component of the elastic force adopts at least one of natural rubber, synthetic rubber, polyurethane or ethylene-vinyl acetate copolymer.

[0045] Specifically, natural rubber, as an important elastic support material, has excellent elasticity and wear resistance. The elastic parts made of it have good anti-aging and durability. Synthetic rubber is a material with excellent elasticity and mechanical properties, and it has good acid resistance, alkali resistance, oil resistance, and heat resistance. The elastic parts made of it have stronger wear resistance and longer service life. Polyurethane is a new type of polymer material with very good elasticity, toughness, and durability. It is one of the materials with the best stability and highest cost performance among elastic materials. The elastic parts made of it have characteristics such as light weight, high strength, fatigue resistance, anti-aging, and corrosion resistance. Ethylene-vinyl acetate copolymer is a solid at room temperature and has good buffering, earthquake resistance, heat insulation, and moisture-proof properties. At the same time, the properties of ethylene-vinyl acetate copolymer are greatly related to the content of vinyl acetate. When the content of vinyl acetate increases, the resilience, flexibility, adhesiveness, stress crack resistance, and impact performance of ethylene-vinyl acetate copolymer will all increase. When the content of vinyl acetate is 45%-55%, ethylene-vinyl acetate copolymer has good elasticity. The elastic parts made of natural rubber, synthetic rubber, polyurethane, or ethylene-vinyl acetate copolymer can provide good deformation recovery ability and can restore the elastic zone to a flat and supporting state.

[0046] Specifically, the buckle part 22 is snapped into the buckle groove 12 for stable closed storage. When solar charging is required, the buckle part 22 is opened and a little external force is applied to unfold the folding part 2 and its second perovskite solar part 21, so that more light can be received.

[0047] Specifically, the perovskite solar thin film battery has at least five layers including a light absorption layer, an electron transport layer, a hole transport layer, and cathode and anode electrodes, a first passivation layer, a second passivation layer, and an outer protective layer.

[0048] More specifically, the light-absorbing layer includes at least one of methylammonium lead iodide (CH3NH3PbI3), methylammonium lead bromide (CH3NH3PbBr3), cesium lead chloride (CsPbCl3), cesium lead bromide (CsPbBr3), cesium lead bromide chloride (CsPbBrxCl3-x), and lead sulfide (PbS); the electron transport layer includes at least one of TiO2, SnO2, and methylfullerene (PCBM); the hole transport layer includes at least one of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), NiOx, and Spiro-OMeTAD; the cathode is a transparent conductive oxide electrode for collecting mobile free electrons and includes at least one of titanium oxide (TiO2), zinc oxide (ZnO), and vanadium oxide (V2O5); the anode is a metal electrode for collecting mobile free holes and includes at least one of gold, aluminum, silver, and copper; the first passivation layer includes at least one of bis-amino cystamine dihydrochloride (CMDR), amino acid L-aspartic acid (LAA), histidine, poly-4-vinylpyridine (P4VP), ethylenediamine dihydroiodide (EDAI2), and hexamethylene diisocyanate (HDI); the second passivation layer includes at least one of tetrabutylammonium chloride (TBAC), hexadecyltrimethylammonium hexafluorophosphate (HTAP), inorganic potassium fluoride (KF), and trimethylsulfonium bromide (TMSBr); the outer protective layer is at least one of plastic and glass.

[0049] According to an embodiment of the present invention, the preparation process of the perovskite solar cell includes:

[0050] Step 1: Prepare a perovskite thin film.

[0051] First, prepare the perovskite material. Specifically, methylammonium lead iodide (CH3NH3PbI3) can be selected as the perovskite material, which 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.

[0052] Step 2: Prepare the perovskite solar cell.

[0053] First, a 100-nm-thick gold layer is vacuum-evaporated on a substrate surface as the anode; then, a 50-nm-thick poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) layer is spin-coated on the anode as the hole transport layer; next, a perovskite thin film is introduced onto the hole transport layer; a 200-nm-thick 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, which has a higher solubility in organic solvents than fullerene (C60). PCBM is an n-type semiconductor with a high electron mobility and is the preferred electron transport material.

[0054] Step 3: Test the performance of the perovskite solar cell and form a module.

[0055] First, a solar simulator is used to test the optoelectronic performance of the cell, 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 cell, including bending strength, folding angle, and cutting accuracy, etc.; then, an environmental test chamber is used to test the environmental adaptability of the cell, 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.

[0056] More specifically, the structure, materials, and parameters of the perovskite solar module 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, 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. Defects with positive or negative charges 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. This 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. This solution can passivate the defects of each component of PSCs to improve the efficiency and stability of the device. For example, the carrier extraction efficiency and VOC can be improved by 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.

[0057] More specifically, cystamine dihydrochloride (CMDR) with diamino groups is introduced between the TiO2 ETL and the perovskite layer. The diamino groups of CMDR can not only form TiN bonds with TiO2, but also form hydrogen bonds with I- in the perovskite, effectively inhibiting the generation of excessive Pb0 defects in PbI2; The oxygen vacancies (VO) and hydroxyl defects on the SnO2 ETL will damage the uniformity of the perovskite 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, accelerate the electron transfer at the interface, and reduce the trap state density at the interface. For example, using multifunctional histidine as the crosslinking agent at the SnO2 ETL / perovskite interface, the strategy of promoting the tight crosslinking of SnO2 and perovskite is beneficial to the extraction and transfer of electrons, improves the quality of the perovskite film, and reduces the non-radiative recombination between interfaces; The crosslinking agent can also effectively adjust the interface energy level and accelerate the electron transfer.

[0058] More specifically, for the 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 between the perovskite and PCBM, facilitate efficient charge extraction between interfaces and inhibit 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; The recombination at the perovskite / PCBM interface after EDAI2 / HDI passivation 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.

[0059] More specifically, for n-i-p type PSCs: The interfacial passivation material should be directly deposited on the perovskite film, and the solvent used to dissolve the interfacial passivation material must be an inert solvent that does not damage the perovskite film. Halide anions or pseudohalide anions can chemically react with anion vacancies or cation defects on the surface of the perovskite film through ionic bonds or hydrogen bonds, thereby improving the crystallinity of the perovskite 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 film, the Cl- in TBAC enters the perovskite lattice by occupying the I- vacancies in the perovskite film or acting as an interstitial, which gives TBAC 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 the top of the perovskite layer with hexadecyltrimethylammonium hexafluorophosphate (HTAP) achieved a terminal sealing passivation strategy, which not only provided a good "channel" for hole extraction but also provided a defect passivation layer for enhancing VOC and FF; the PF6- in HTAP can fill the halide anion vacancies on the perovskite film and can anchor the uncoordinated Pb2+, contributing to the improvement of the crystallization and morphology of the perovskite film; the sealing passivation strategy also effectively alleviated the problem of lead leakage.

[0060] More specifically, 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, NiOx has become 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 was used to effectively reduce the maximum valence band of PTAA, facilitating hole extraction, significantly increasing the recombination resistance at the PTAA / perovskite interface, and thus suppressing interfacial carrier recombination. For example, a trimethylsulfonium bromide (TMSBr) interface layer was introduced between the NiOx / perovskite interface by vapor deposition to eliminate the multi-step photodegradation of the NiOx-perovskite heterojunction during device fabrication, and to inhibit the formation of the PbI2 phase through the redox reaction between NiOx and organic iodide salts, facilitating the strain release and extraction of carriers at the NiOx / perovskite interface; the TMSBr interface layer also has lattice parameters matching those of the perovskite crystal and a strong trap passivation ability.

[0061] More specifically, additives are used to passivate the defects of the perovskite light-absorbing layer, effectively suppressing SRH non-radiative recombination by improving carrier extraction and transport; dopants are 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.

[0062] The perovskite solar cell prepared by the above method 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 come into contact, due to the concentration difference of carriers themselves, diffusion occurs, an internal built-in electric field is generated at the contact interface, and at the same time, 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 band gap, exciting electrons originally bound around the atomic nucleus 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 electron-hole pairs 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.

[0063] More specifically, the mobile phone case is assembled onto the mobile phone. The mobile phone case can not only protect the mobile phone, but also generate electricity when exposed to sunlight. The electricity is introduced into the mobile phone battery through the solar components on the mobile phone case, achieving the purpose of storing electrical energy and extending the battery life of the mobile phone. As a thin-film solar cell, the perovskite solar cell can be prepared on a flexible substrate to form a flexible thin-film solar cell. Attaching the flexible thin-film solar cell to the outer surface of the mobile phone case can make it fit the mobile phone case better, and at the same time, it will not increase the hardness of the mobile phone case, ensuring that the mobile phone case can be normally assembled onto the mobile phone. One end of the wired charging part 4 in this Embodiment 1 is connected to the positive and negative electrodes of the thin-film solar cell through the electrode connection part, and the other end is in electrical contact with the battery circuit of the mobile phone through the charging connector to achieve connection, ensuring that the perovskite solar cell module charges the mobile phone battery.

[0064] According to the embodiment of the present utility model, in addition to the above-mentioned wired charging part 4 realizing the charging of the mobile phone battery by the thin-film solar cell through the charging cable, this embodiment also provides a wireless charging structure, that is, a wireless transmitting coil is arranged on the shell body 1, which is matched with the wireless receiving coil arranged in the mobile phone. In addition to the wireless transmitting coil, the solar cell module 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 of 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 wireless charging circuit inside the mobile phone to charge the battery inside the mobile phone. The wireless charging circuit can be arranged inside the mobile phone case together with the wireless transmitting coil, or a heat dissipation component layer can be arranged or integrated, and no specific limitation is made here.

[0065] Embodiment 2

[0066] The present utility model provides a perovskite solar mobile phone case with a folding part, as shown in the attached Figure 2 shown.

[0067] The difference between this embodiment and Embodiment 1 lies only in that this embodiment is provided with a plurality of folding parts 2, and a second perovskite solar part 21 is respectively pasted or integrally prepared on each folding part 2. One of the folding parts 2 is hinged to the side surface of the shell body 1 through the hinge part 3. When the plurality of folding parts 2 are unfolded, each adjacent two of the remaining folding plates 2 are hinged through the hinge part 3. After the plurality of folding plates 2 are unfolded, that is, the folding part 2 at the leftmost end is connected to the right end of the shell body 1 through the hinge part 3. A buckle groove 12 is provided at the left end of the shell body 1, and a buckle part 21 matching the buckle groove 12 is provided at the rightmost side of the folding part 2 at the rightmost end. The plurality of folding parts 2 can be disassembled according to actual situations. When storage is needed, after folding the plurality of folding parts 2 in sequence, the buckle part 21 is buckled into the buckle groove 12, thereby realizing the storage of the perovskite solar part.

[0068] Embodiment 3

[0069] The present utility model provides a perovskite solar mobile phone case with a folding part, as shown in the attached Figure 3 figure.

[0070] The difference between this embodiment and Embodiment 1 lies only in that the mobile phone case in this embodiment includes:

[0071] The perovskite solar part is a first perovskite solar part 11, and the first perovskite solar part 11 is integrally formed and foldable. One end thereof is connected to the shell body 1, and the other end is connected to the folding part 2.

[0072] In this embodiment, when the mobile phone needs to be charged with a higher power, the buckle part 22 on the folding part 2 is opened. Since the plug-in part 32 can also be taken out and separated from the shell body 1, the other side of the first perovskite solar part 11 arranged on the folding part 2 is driven by the folding part 2 to be unfolded; the large area is pulled open by the foldable long-strip perovskite solar cell to charge the mobile phone; when storage is needed after charging is completed, the perovskite solar cell is folded in the form of a memorial or a folding fan. Due to the ultra-thin characteristic of the perovskite solar cell, the overall thickness after folding is still very thin, and the folding part 2 can be stably covered again through the hinge part 3 and the buckle to form protection for the perovskite solar cell.

[0073] The perovskite solar cell thin film used in the present utility model is a micron-level thin film or a film structure, which at least includes: a metal electrode layer, a hole transport layer, a perovskite layer, an electron transport layer, and a transparent conductive glass layer, and the transparent conductive glass layer is arranged on the outermost layer of the perovskite solar thin film battery. The thickness ranges of each layer are as follows: Among them, the transparent conductive glass is mostly formed by depositing a transparent conductive material on the transparent glass, including indium tin oxide (ITO), fluorine-doped tin oxide (FTO), etc., with a thickness of about 1 μm; the electron transport layer is mostly composed of materials such as SnO2, C 60 , PCBM, etc., with a thickness of about 20–50 nm; the perovskite layer is the main material of the solar cell, with a thickness of about 200–800 nm; the hole transport layer materials are mostly Spiro-OMeTAD, NiOx, PTAA, etc., with a thickness of about 50–200 nm; the material of the metal electrode layer is Au, Ag, Cu, etc., with a thickness of about 80–150 nm. Since the perovskite solar cell in our solution is a flexible thin film, 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 there is a layer of laminated polymer plastic on the outside, 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. The transparent conductive glass used for the perovskite solar cell substrate must be selected as flexible glass. For example, a bendable glass with a thickness of 0.03 mm - 2 mm can be used. For example, the flexible glass currently produced by flexible glass manufacturers represented by Corning has a thickness of about 0.1 mm, and there is a layer of laminated polymer plastic on the outside, which can make the glass bend without breaking. With the progress of technology, in the future, ultra-thin flexible glass or transparent substrate materials with a thickness less than 0.03 mm will be widely produced. These materials have good flexibility and a thickness closer to that of a plastic film, and will become a better choice for the perovskite solar cell substrate described in this solution.

[0074] The above embodiments of the present utility model realize a foldable and expandable perovskite solar mobile phone case by setting a shell main body 1, a folding part 2 and a hinge part 3. It not only realizes the folding and storage of solar components, but also realizes a relatively large area of perovskite solar modules, improving the area and charging power of the solar panel and enhancing the practical function of the mobile phone case. The thin-film solar cell as the perovskite solar part has the advantages of small mass, extremely thin thickness, bendability, flexibility, and simple manufacturing process, etc., and is suitable for being made on the mobile phone case. When the mobile phone circuit is connected to the solar cell electrode connected by the wired charging part 4 of the mobile phone case of the present utility model, the solar part will form a current loop, thereby realizing photoelectric conversion and supplying electric energy to the mobile phone and its battery, and also endowing the mobile phone case with a more practical function in addition to protecting the mobile phone and decoration, etc. The mobile phone using this mobile phone case will have the function of generating electricity or storing electricity through solar energy, so that there is no need to increase the energy density of the battery, neither increasing the weight and volume of the mobile phone nor losing the portability of the mobile phone, effectively using solar energy to generate electricity or replenish energy for the mobile phone, solving problems such as the inconvenience of the mobile phone and the limited use scenarios, meeting the user's demand for conveniently using the mobile phone in the natural environment. At the same time, the manufacturing process is simple, and the thin-film structure is especially suitable for being made on the mobile phone case, which is also conducive to large-scale application.

[0075] The above are only specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. 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 utility model.

[0076] It should be understood that the present utility model 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 utility model is only limited by the appended claims.

Claims

1. A perovskite solar cell phone case with a folding part, characterized in that, It includes a shell body (1) and a folding part (2). The shell body (1) is hinged with the folding part (2) through a hinge part (3). The folding part (2) is composed of one or more back folding plates. A perovskite solar part is arranged on the shell body (1) and / or the folding part (2). The perovskite solar part is connected with a charging part, and the perovskite solar part charges a mobile phone installed on the shell body (1). And the perovskite solar part is arranged on the shell body (1) or the folding part (2) by means of attachment or integrated preparation.

2. The perovskite solar mobile phone shell with a folding part according to claim 1, wherein the folding part (2) is composed of a plurality of back folding plates. The sides of the plurality of back folding plates are sequentially hinged to form a back folding plate expansion surface for expanding the light receiving area. Among them, the back folding plate of the folding part (2) close to the shell body (1) is hinged with the shell body (1) through the hinge part (3).

3. The perovskite solar mobile phone shell with a folding part according to claim 1, wherein the perovskite solar part is foldable. One end of it is connected to the shell body (1), and the other end is connected to the folding part (2).

4. The perovskite solar mobile phone shell with a folding part according to any one of claims 1-3, wherein the hinge part (3) is composed of a fixing part (31) and a plugging part (32). The fixing part (31) and the plugging part (32) are respectively and correspondingly arranged on the shell body (1) and the folding part (2) or two adjacent back folding plates.

5. The perovskite solar mobile phone shell with a folding part according to claim 4, wherein a slot is opened on the side wall of the fixing part (31). a pressing component is arranged at the upper end of the plugging part (32), a plug board is arranged on the side, and an elastic component is arranged below the pressing component. By pressing the pressing component, the plug board is inserted into or pulled out of the slot.

6. The perovskite solar mobile phone shell with a folding part according to claim 4, wherein an electrode contact of the perovskite solar part is arranged on the fixing part (31), and an electrode contact point of the perovskite solar part is correspondingly arranged on the plugging part (32).

7. The perovskite solar mobile phone shell with a folding part according to claim 1, wherein a plurality of the perovskite solar parts are connected in series or in parallel, and a perovskite solar thin film battery with a thickness less than 0.5 mm is arranged on each of the perovskite solar parts.

8. The perovskite solar mobile phone shell with a folding part according to claim 7, wherein the perovskite solar thin film battery at least includes: a metal electrode layer, a hole transport layer, a perovskite layer, an electron transport layer, and a transparent conductive glass layer.

9. The perovskite solar cell phone case with a folding part according to claim 1, characterized in that, A snap groove (12) and a snap part (22) are respectively arranged on the corresponding sides where the shell body (1) and the folding part (2) are hinged. By snapping the snap part (22) into the snap groove (12), the shell body (1) and the folding part (2) are covered.

10. The perovskite solar cell phone case with a folding part according to claim 1, characterized in that, The charging part includes a wired charging part (4) or a wireless charging part arranged on the shell main body (1). One end of the wired charging part (4) is connected to the cathode and anode of the perovskite solar part, and the other end is connected to the mobile phone charging interface. The wireless charging part includes a wireless transmitting coil arranged on the shell main body (1), which is arranged to match the wireless receiving coil in the mobile phone.

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