1524 results about "Hole transport layer" patented technology

An organic light-emitting device comprises an anode, a cathode and an organic layer formed between the anode and the cathode, and the organic layer comprises a hole injection layer, a hole transmission area, an electron blocking layer, a light-emitting area and an electron transmission area. The hole transport region comprises a first material and a second material, the first material and the second material are sequentially evaporated to form two hole transport layers, and the first material is selected from a compound shown in the formula 1; and the second material is selected from a compound shown in a formula 2. According to the invention, the first material with a high refractive index is used as the first hole transport layer, the second material with a low refractive index is used as the second hole transport layer, and the structures of the first material and the second material are respectively limited at the same time. The invention overcomes the limitation of a single material or a simple mixed material in the aspects of hole transport and luminous efficiency. .

The invention belongs to the technical field of solar cells, and relates to a perovskite laminated cell and a preparation method thereof, the perovskite laminated cell can reduce light parasitic absorption, the perovskite laminated cell comprises a bottom crystalline silicon cell, the bottom crystalline silicon cell comprises a substrate, the substrate comprises a first surface and a second surface which are opposite to each other, a first tunneling oxide layer and a first composite passivation layer are sequentially arranged on the first surface in the direction perpendicular to and away from the first surface, and the first composite passivation layer comprises first doped crystalline silicon conductive regions and first wide-band gap conductive regions which are alternately arranged in the direction parallel to the first surface; the top perovskite cell is arranged on the first composite passivation layer and is electrically connected with the bottom crystalline silicon cell, and the top perovskite cell comprises a hole transport layer, a perovskite active absorption layer, an electron transport layer, an interface buffer layer, a transparent conductive layer and an anti-reflection layer which are sequentially far away from the first composite passivation layer; and a first electrode in electrical contact with the transparent conductive layer.

The invention provides a preparation method and application of a quantum dot light-emitting diode based on interface modification, and belongs to the technical field of quantum dot materials. The preparation method comprises the following steps: (1) spin-coating PEDOT: PSS-4083 on ITO (Indium Tin Oxide) to obtain a hole injection layer; (2) spin-coating polyvinyl carbazole on the hole injection layer in the step (1) to obtain a hole transport layer; (3) spin-coating pyridine on the hole transport layer in the step (2) to obtain a modification layer; (4) spin-coating ZnCdS / ZnS quantum dot normal octane on the modification layer in the step (3) to obtain a quantum dot film; and (5) spin-coating an Mg-doped ZnO ethanol solution on the quantum dot film in the step (4), and performing high-vacuum evaporation to obtain the quantum dot light-emitting diode. Compared with an original device, the EQE of the prepared quantum dot light emitting diode is improved by 16.5%, and the highest brightness is improved by 12.5%.

The invention relates to a compound, a preparation method, a hole transport layer material, a photovoltaic device and a photovoltaic module. R1 and R4 are respectively and independently selected from amino and derivatives thereof, hydroxyl and derivatives thereof, methoxyl and derivatives thereof, sulfydryl and derivatives thereof, methylthio and derivatives thereof, thiophene groups and derivatives thereof, phosphate groups and derivatives thereof, carboxylic acid groups and derivatives thereof, and sulfonic acid groups and derivatives thereof; r2 and R3 are independently selected from alkyl, a phosphate group and derivatives thereof, a carboxylic acid group and derivatives thereof, a sulfonic acid group and derivatives thereof, and trimethoxysilyl propyl and derivatives thereof. The material is beneficial to improving the photoelectric conversion efficiency of photovoltaic devices and photovoltaic modules.

The invention relates to the technical field of preparation of organic photoelectric materials, in particular to an organic light-emitting device and a display or lighting device comprising the organic light-emitting device. A hole transport layer compound of the device is obtained by taking a phenyl and alkyl fixed substituted fluorenyl structure as a core fragment and taking a benzo five-membered ring and a limited substituted benzene ring as two side chains of amido, and is matched with a limiting material of a light-emitting auxiliary layer to manufacture an OLED (Organic Light Emitting Diode) element; the light-emitting efficiency and the working life of the organic light-emitting device are effectively improved, and the application prospect is very good.

The invention provides a perovskite solar cell, a preparation method thereof and a photovoltaic module. The perovskite solar cell comprises a first electrode, a hole transport layer, a perovskite layer, an electron transport layer and a second electrode which are stacked in sequence. The material of the hole transport layer comprises a biomolecular material which is fixed on a self-assembly monomolecular layer material through an intermolecular force, and the biomolecular material comprises one or more of guanine, adenine, thymine, uracil, cytosine, hydroxymethylcytosine, xanthine, hypoxanthine, 6-mercaptopurine and corrin. According to the perovskite cell provided by the invention, the biomolecular material with a plurality of nitrogen heterocyclic structures and amino groups is added to generate multipoint hydrogen-bond interaction and pi-pi accumulation with the tail end of the SAM, so that the orderliness of molecular arrangement is improved, and the dipole direction and strength of the whole interface are regulated and controlled; and a coordination bond or hydrogen bond network is formed by the coordination compound and uncoordinated cations or anions in perovskite, so that interface defects are effectively passivated, and the thermal stability and the humid and hot life of a device are enhanced.

The invention discloses a perovskite solar cell and a preparation method thereof, and belongs to the technical field of perovskite solar cells. SAM molecules are introduced between the hole transport layer and the perovskite active layer, the photoelectric conversion efficiency of the perovskite solar cell is improved, an interface modification layer comprising a sheet-shaped P-type semiconductor material is further introduced at the interface of the hole transport layer and the SAM layer, the interface of the hole transport layer / the SAM layer / the perovskite active layer is improved, and the photoelectric conversion efficiency of the perovskite solar cell is improved. The hole transport layer and the perovskite active layer are separated from each other, the energy level difference between the functional layers is reduced, the carrier extraction and transmission of an interface are enhanced, the sheet structure of the sheet P-type semiconductor material can cooperate with the compact SAM layer to block the direct contact between the hole transport layer and the perovskite active layer, and the hole transport efficiency is improved. And the reduction reaction of halide ions in an interinterface hole transport material and a perovskite material is effectively prevented.

The invention discloses an organic light-emitting device and a light-emitting device, one side of the organic light-emitting device close to an anode is provided with two hole transport layers which are arranged according to a high-low refractive index relationship, the material of the first hole transport layer is as shown in a formula 1, and the material of the second hole transport layer is as shown in a formula 2. According to the organic light-emitting device and the light-emitting device, through matching optimization of device film layer materials and structural combination of film layers with different refractive indexes, the stability of the materials and transmission of current carriers are guaranteed, meanwhile, light field distribution is improved through optimization of an optical microcavity structure, the photon extraction efficiency of the device is improved, and the light-emitting efficiency of the device is improved. The ineffective loss of photon energy in the organic layer is reduced, so that the performance of the organic light-emitting device and the light-emitting device comprising the organic light-emitting device is improved in the aspects of light-emitting efficiency, starting voltage, light-emitting service life and the like. Formula 1 and Formula 2.

The invention discloses an indolocarbazole compound, a perovskite solar cell and a preparation method, and belongs to the technical field of perovskite solar cells, the indolocarbazole compound provided by the invention is an organic small molecule material and has an asymmetric molecular structure, and an asymmetric conjugated structure system of the indolocarbazole compound enhances the molecular dipole moment and improves the photoelectric conversion efficiency. And the energy level matching is optimized. Meanwhile, benzene ring groups on side chains of molecules of the organic hole transport layer can further inhibit excessive aggregation of the molecules, uniform coverage is achieved, and efficient transport of carriers is achieved. Therefore, when the indolocarbazole compound organic small molecule material is used as a hole transport layer material for a perovskite solar cell, the energy levels of the highest occupied molecular orbital HOMO and the lowest unoccupied molecular orbital LUMO of the indolocarbazole compound organic small molecule material provided by the invention can be well matched with the energy level of an active layer material; therefore, the collection efficiency of current carriers is greatly improved, and the filling factor and the photoelectric conversion efficiency are improved.

The invention discloses a carbazole phosphonate-thiophene copolymer as well as a preparation method and application thereof. The structural formula of the carbazole phosphonate-thiophene copolymer is shown as a formula (I), according to the invention, the carbazole phosphonate compound and the thiophene compound are copolymerized, and the obtained copolymer is used for preparing the hole transport layer of the perovskite solar cell, so that the perovskite solar cell has relatively high photoelectric conversion efficiency, and the relatively high photoelectric conversion efficiency can be kept in a humid and hot environment.

The invention discloses a full-perovskite laminated solar cell based on narrow-band-gap buried interface modification and a preparation method and application of the full-perovskite laminated solar cell. According to the preparation method of the full-perovskite laminated solar cell based on narrow-band-gap buried interface modification, hydrazine sulfate and lead iodide are introduced to serve as an interface modification layer between a narrow-band-gap perovskite layer and a hole transport layer, and through the synergistic effect of the hydrazine sulfate and the lead iodide, surface defects of the hole transport layer can be effectively passivated; moreover, the hole mobility can be improved remarkably, and the photoelectric conversion efficiency of the cell is improved based on the preparation method of the full-perovskite laminated solar cell. The full-perovskite laminated solar cell has high photovoltaic performance and can be widely applied to the photoelectric field.

The invention discloses a perovskite / crystalline silicon laminated cell based on polycrystalline silicon tunnel junction and interface modification, and belongs to the field of photovoltaic technology. The laminated cell is sequentially provided with a crystal silicon bottom cell, a polycrystalline silicon tunnel junction, an interface modification layer and a perovskite top cell from bottom to top. The polycrystalline silicon tunnel junction comprises an n-type polycrystalline silicon layer, an intrinsic layer and a p-type polycrystalline silicon layer from bottom to top; the doping concentration of the n-type polycrystalline silicon layer is gradually reduced towards the intrinsic layer, and the doping concentration of the p-type polycrystalline silicon layer is increased towards the direction far away from the intrinsic layer; the interface modification layer is arranged between the p-type polycrystalline silicon layer and the perovskite top cell; and the interface modification layer is adjacent to an electron transport layer of the perovskite top cell. Through the change design of the doping concentration of the polycrystalline silicon tunneling junction and the design of the interface modification layer and the hole transport layer, the problem of interface compatibility between the polycrystalline silicon tunneling layer and the perovskite top cell and the problem of poor stability of the laminated cell are solved, and the performance of the laminated cell is comprehensively improved.

The invention discloses a perovskite solar cell based on a cross-linked interface passivation layer, and relates to the technical field of photovoltaic cell materials. The perovskite solar cell sequentially comprises a transparent conductive substrate, an electron transport layer, a perovskite light absorption layer, a crosslinking interface passivation layer, a hole transport layer and a metal electrode from bottom to top, and the cross-linked interface passivation layer is made of a 4-[10-(4-{(1, 2, 2-trifluorovinyl) oxy} phenyl)-10H-phenoxazine-2-yl] phenylphosphonic acid material. The cross-linked interface passivation layer can significantly improve the photovoltaic performance and stability, the intrinsic stability of the device is greatly enhanced by the cross-linked network, and in a double-85 aging test of 85 DEG C / 85% RH, the time required for attenuating the efficiency of the device to 80% of an initial value can exceed 1000 hours.

The invention relates to the technical field of solar cells, in particular to a full back contact type series perovskite solar cell and a preparation method thereof. The solar cell sequentially comprises a glass substrate, a perovskite light absorption layer, a patterned hole transport layer, a patterned electron transport layer, an insulating layer, a patterned electrode layer, a packaging adhesive film and backboard glass from a light incidence side to a back side, the patterned hole transport layers and the electron transport layers are located on the same horizontal plane and are alternately distributed at intervals, and charge collection in the cell unit and electrical series connection between adjacent units are achieved through the same patterned electrode layer. According to the invention, the glass substrate side is used as a light incident surface, the front electrode shading is eliminated, and the carrier recombination loss is effectively reduced in combination with the back contact structure; meanwhile, the preparation process is greatly simplified through the integrated coplanar electrode and the patterning design, the series resistance and the production cost are reduced, and the photoelectric conversion efficiency, the production yield and the industrial application prospect of the cell are remarkably improved.

The invention discloses a hole transport layer, a preparation method thereof and a solar cell. The hole transport layer comprises an SAM (single self-assembled monomolecular layer) material and a buried material, and the buried material comprises F-type phosphate group-containing molecules. According to the invention, the technical problems of poor coverage of a hole transport material SAM on a transparent conductive oxide (TCO) substrate and weak transmission capability in a perovskite cell or a laminated cell in the prior art can be solved. The hole transport layer is more uniform, the interface transmission loss is smaller, and the filling factor and the conversion efficiency are remarkably improved when the hole transport layer is used for the solar cell.

The invention provides an organic electrochemical transistor regulated and controlled by a grating electrode and a preparation method of the organic electrochemical transistor, and belongs to the technical field of photoelectric detection and organic electrochemical transistors. The organic electrochemical transistor comprises a transparent substrate, a detector anode, a hole transport layer, a photosensitive layer, a semiconductor active layer, an electron transport layer, a detector cathode, a packaging layer, a transistor grid electrode, a transistor source electrode, a transistor drain electrode and an electrolyte. A QPD and an OECT are integrated above the transparent substrate. The invention also provides a preparation method of the organic electrochemical transistor. Through the illumination effect, the photo-generated voltage generated by the QPD serves as a grid regulation and control signal, and higher current variation for different illumination intensities is achieved. The preparation process is remarkably simplified, the responsivity, the detectivity and the linear dynamic range of the device are improved, the stability and the low power consumption characteristic are improved, and a new solution is provided for application of a photoelectric-electrochemical fusion device in the fields of flexible electronics, wearable detection, biosensing and the like.

The invention belongs to the technical field of photovoltaic solar materials, and discloses a method for modifying a calcium iron ore solar cell by a small molecule buried interface, which is used for solving the problems of low photoelectric conversion efficiency and poor stability of a perovskite solar cell. Halogenated monothiadiazole or halogenated polythiadiazole molecules are used as a buried interface layer and are led between the hole transport layer and the perovskite layer. The interface layer generates uniform film covering on the hole transport layer, so that non-covalent bond interaction is formed, and spreading and expansion of a perovskite precursor solution are facilitated. N atoms in the BSC and the BFS are combined with Pb < 2 + > to passivate the bottom surface defect of the perovskite, and F atoms in the BFS can form hydrogen bonds with FAI, so that the electronic performance of the perovskite thin film is influenced. Due to good film quality and interface contact, non-radiative recombination between interfaces is effectively inhibited, carrier transport of the device is improved, and therefore the efficiency and stability of the perovskite solar cell device are enhanced.

The invention provides a preparation method of a perovskite solar cell, and belongs to the field of perovskite solar cells, and the preparation method comprises the following steps: S1, pretreating a transparent conductive substrate; s2, spin-coating the surface of the transparent conductive substrate with a nanoparticle dispersion liquid, and carrying out annealing treatment to obtain a flattened transparent conductive substrate; soaking the leveled transparent conductive substrate in a hydrogen peroxide solution with the concentration of 1-3%, washing and drying, and then carrying out ultraviolet ozone treatment to obtain a hydroxyl modified leveled transparent conductive substrate; s3, spin-coating a hole transport layer on the surface of the hydroxyl modified and flattened transparent conductive substrate; s4, spin-coating a perovskite light absorption layer on the surface of the hole transport layer; s5, spin-coating an electron transport layer on the surface of the perovskite light absorption layer; and S6, evaporating an electrode layer on the surface of the electron transport layer. According to the invention, the photoelectric conversion efficiency of the perovskite solar cell is significantly improved through leveling and hydroxylation treatment of the substrate.

The embodiment of the invention provides a connecting layer, a composite layer, a solar cell and a laminated cell. The connecting layer comprises a first transparent conductive layer and a hole transport layer which are stacked; and the hole transport layer is an alloy film containing Ga, Al, In, Sn, O and N elements. Component regulation and control are carried out on the hole transport layer, P-type doping is realized by utilizing a co-doping strategy, the hole concentration of a traditional tin oxide material layer is improved, long wavelength absorption is not remarkably increased, and in addition, multi-component doping can also avoid that a single component is easy to separate out and split phases.

The invention relates to an upper interface modified inverted perovskite solar cell and a preparation method thereof. The solar cell sequentially comprises a transparent conductive substrate, a hole transport layer, a perovskite absorption layer, a mixed salt ion passivation layer, an electron transport layer, a hole barrier layer and a counter electrode from bottom to top, the structural formula of the perovskite absorption layer is APbX3; the mixed salt ion passivation layer is made of micromolecular organic matter and inorganic salt. The photoelectric conversion efficiency and the stability of the obtained perovskite solar cell are remarkably improved, the commercialization progress of perovskite is promoted, and the perovskite solar cell has a wide application prospect.

The invention relates to the technical field of solar cells, in particular to a perovskite solar cell based on a mixed self-assembly monomolecular layer and a preparation method of the perovskite solar cell. The perovskite solar cell based on the hybrid self-assembly monomolecular layer comprises a hybrid self-assembly monomolecular hole transport layer; the mixed self-assembly monomolecular hole transport layer contains polymerized SAM and monomolecular SAM; the mass ratio of the polymerized SAM to the monomolecular SAM is (1-10): 1. Two self-assembled monomolecular materials with different end groups are mixed to serve as the hole transport layer, and meanwhile, the photoelectric property and the mechanical property of the flexible f-PSCs are optimized; according to the flexible perovskite solar cell, agglomeration of a traditional SAM material is reduced, the coverage degree difference of the SAM material on the substrate is improved, meanwhile, the adhesive force between the perovskite layer and the flexible substrate is improved, and the photovoltaic performance and mechanical stability of the flexible perovskite solar cell are improved.

The invention discloses a perovskite / crystalline silicon laminated solar cell, a preparation method thereof and a photovoltaic module. The perovskite / crystalline silicon laminated solar cell provided by the invention comprises a perovskite top cell, a crystalline silicon bottom cell and a composite layer used for connecting the perovskite top cell and the crystalline silicon bottom cell, the perovskite top cell comprises a composite hole transport layer, the composite hole transport layer comprises a first hole transport layer and a second hole transport layer, and the first hole transport layer is in contact with the composite layer; the first hole transport layer is obtained by sputtering a nickel oxide target material by introducing H2 in an oxygen-free sputtering atmosphere, and the second hole transport layer is obtained by sputtering the nickel oxide target material in a hydrogen-free atmosphere. According to the perovskite / crystalline silicon laminated solar cell provided by the invention, the composite hole transport layer can realize better contact matching with the middle composite layer, better charge extraction and collection are carried out on the perovskite light absorption layer, and meanwhile, the perovskite / crystalline silicon laminated solar cell has better conductivity.

The invention relates to a solar cell and a preparation method thereof. The solar cell comprises a light absorption layer, a hole modification layer and a hole transmission layer which are arranged in a stacked mode. The hole modification layer is located between the light absorption layer and the hole transmission layer; the material of the hole modification layer comprises at least one of self-assembled monomolecular layer materials and at least one of polyoxometallate. According to the solar cell, the hole extraction capability of the hole transport layer can be improved, the hole mobility of an interface is improved, and the high photoelectric conversion efficiency of the solar cell is further achieved.

The invention discloses a trans-perovskite solar cell and a preparation method thereof. The trans-perovskite solar cell comprises a conductive substrate, a hole transport layer, a passivation layer, a perovskite absorption layer, an electron transport layer and a back electrode layer which are arranged in sequence, the hole transport layer is made of nickel oxide; the passivation layer is made of cerium oxide, and the thickness of the passivation layer is 2-5nm; the light incidence direction of the solar cell is from one side of the conductive substrate to one side of the back electrode layer. Ce < 3 + > in cerium oxide is preferentially combined with dangling bonds on the surface of NiOx to form Ce-O-Ni bonds, so that interface defects are eliminated; the cerium oxide energy level is located between the perovskite and the hole transport layer, so that an energy level buffering effect is achieved, and the photoelectric conversion efficiency is improved; the Ce < 3 + > / Ce < 4 + > valence state conversion characteristic of cerium oxide can efficiently absorb and convert ultraviolet photons and prevent the ultraviolet photons from damaging a perovskite lattice structure; the fluorite structure of CeO gamma forms an ion diffusion barrier to block Ni < 2 + > from migrating to a perovskite layer and protect the perovskite structure.

The invention provides a silicon / perovskite / GaInP three-junction laminated solar cell and a preparation method thereof, and belongs to the technical field of solar cells. The cell adopts a multi-layer stacked structure and sequentially comprises a GaInP cell, a transparent conductive adhesive, a perovskite top electrode, an anti-reflection layer, a transparent conductive electrode, an electron transport layer, a perovskite layer, a hole transport layer, a silicon cell and a back electrode from top to bottom. The GaInP cell is mechanically stacked and integrated with the lower perovskite / silicon cell through the transparent conductive adhesive, spectrum splitting and current matching are completed on the premise of not depending on epitaxial growth, the solar spectrum absorption range is remarkably widened, and the photon utilization rate is improved. According to the cell structure and the preparation method provided by the invention, the perovskite / silicon / gallium indium arsenide three-junction laminated solar cell which is efficient, stable and flexible and can be prepared in a large area can be realized.

The invention relates to a perovskite solar cell, a preparation method thereof and a photovoltaic module. The perovskite solar cell comprises a hole transport layer, the hole transport layer comprises a metal oxide layer, and the grain size of the metal oxide layer is 5-10 nm; the self-assembly molecular layer is arranged on the first surface of the metal oxide layer, and the hydroxyl coverage rate of the first surface is 7%-25%. According to the perovskite solar cell, the defects of the hole transport layer and the defects of the self-assembly molecular layer can be improved at the same time, and the film layer binding force between the hole transport layer and the self-assembly molecular layer is enhanced, so that the carrier transport efficiency in the perovskite solar cell is effectively improved, and the photoelectric property is improved.

The invention provides a high-stability electron transport layer and a perovskite solar cell. A preparation method of the electron transport layer comprises the following steps: evaporating a layer of fullerene (C60) on a substrate on which a hole transport layer and a perovskite thin film layer are prepared; a layer of graphite-like phase carbon nitride (g-C3N4) is spin-coated on the C60; and finally, depositing a layer of tin oxide (ALD-SnO2) by utilizing atomic layer deposition. The g-C3N4 has good electrical conductivity, not only can fill some gaps between C60 and ALD-SnO2, but also can interact with C60 and ALD-SnO2, so that the C60 and ALD-SnO2 are attached more tightly, and the interface stability is improved. The prepared high-stability electron transport layer is applied to a perovskite solar cell device, and the stability of a perovskite solar cell is remarkably improved.

The invention discloses a functional formamidine salt treated perovskite solar cell and a preparation method thereof. The solar cell comprises a transparent conductive substrate, an electron transport layer, a perovskite active layer, a perovskite modification layer, a hole transport layer and a metal counter electrode which are sequentially arranged from bottom to top, the perovskite light absorption layer is made of lead iodide formamidine perovskite; and the perovskite modification layer is a low-dimensional passivation layer which grows in a vertical orientation manner and is obtained by carrying out in-situ reaction on functional organic formamidine salt and the three-dimensional perovskite light absorption layer. According to the method, the surface defects of the three-dimensional perovskite thin film are effectively passivated, so that non-radiative recombination is effectively inhibited, and the charge transfer capability is improved; meanwhile, the interface energy level matching degree is optimized, and hole extraction is promoted. The preparation method provided by the invention is simple and easy to realize, has high repeatability, and effectively improves the photoelectric conversion efficiency and stability of the perovskite solar cell.

The invention relates to the technical field of electrochromism, in particular to an electrochromism device which comprises a perovskite battery and an electrochromism device which are arranged in a stacked mode. The perovskite cell comprises a bottom electrode layer, an electron transport layer, a perovskite layer, a hole transport layer and a top electrode layer which are stacked in sequence. The electrochromic device comprises a top electrode layer, an electrochromic layer, an electrolyte layer and a counter electrode layer which are sequentially arranged in a stacked mode. The top electrode layer is a common transparent electrode of the perovskite cell and the electrochromic device, and the bottom electrode layer and the counter electrode layer are electrically connected through an on-off element; the open-circuit voltage of the perovskite cell is greater than the color-changing voltage of the electrochromic device. According to the electrochromic device, integration of the perovskite battery and the electrochromic device is achieved, color changing can be achieved under the condition that the electrochromic device is not connected with an external power source, self-power-supply and self-driving are achieved, and portable scene application is facilitated.

The invention relates to the technical field of perovskite solar cell functional thin film packaging, in particular to a solar cell with a perovskite active layer packaged by a double-sided thin film and a preparation method of the solar cell. Al2O3 is used for depositing a layer of Al2O3 thin film between the perovskite active layer and a P-type carrier transport layer (hole transport layer HTL); a layer of SiO2 thin film is deposited between a perovskite active layer and an N-type carrier transport layer (electron transport layer ETL), and a double-sided thin film wrapping layer is formed by an Al2O3 thin film and the SiO2 thin film; through the design and preparation method of the Al2O3 / SiO2 double-sided thin film packaging perovskite active layer, the core stability problem of the perovskite active layer is effectively solved. The double-sided packaging structure can efficiently block water and oxygen permeation, and the perovskite is prevented from being decomposed due to water and oxygen erosion; meanwhile, diffusion of metal electrode ions to a perovskite layer and migration of halogen ions in perovskite to the electrode can be inhibited, bidirectional damage is reduced, and the sensitivity of perovskite to water and oxygen and performance degradation caused by interface ion migration are relieved fundamentally.