1813 results about "Electron transport layer" patented technology

The invention discloses a thiapyran molecule modified solar cell and a preparation method thereof. The cell sequentially comprises an ITO (Indium Tin Oxide) conductive glass layer, a 4-aminotetrahydro-2H-thiapyran-1, 1-dioxide hydrochloride modified [4-(3, 6-dimethoxy-9H-carbazole-9-yl) butyl] phosphonic acid hole transport layer, a Cs0.05 (FA < 0.77 > MA < 0.23 >) < 0.95 > Pb < (I < 0.77 > Br < 0.23 >) 3 wide-band gap perovskite thin film, a phenethyl ammonium iodide passivation layer, an electron transport layer of [6, 6]-phenyl-C61-butyric acid isomethyl ester, a 2, 9-dimethyl-4, 6, 7-tetrahydro-2H-thiapyran-1, 1-dioxide hydrochloride modified [4-(3, 6-dimethoxy-9H-carbazole-9-yl) butyl] the hole barrier layer is made of 1, 7-biphenyl-1, 10-phenanthroline; the electrode layer is made of metal Ag; according to the scheme, the hole transport layer is modified through thiapyran molecules, agglomeration of the hole transport layer is relieved, and a more compact and more uniform self-assembled single layer is generated by inducing favorable crystal orientation. A good bottom interface is obtained based on thiapyran molecule modification, and ordered growth of high-quality perovskite crystal grains is promoted. In addition, the energy level of the hole transport layer is effectively adjusted through thiapyran molecule treatment, and the extraction and transmission of carriers by the hole transport layer are enhanced.

The present disclosure provides a perovskite cell and a preparation method therefor, and a photovoltaic module. The perovskite cell comprises a substrate, and a perovskite layer (3) and an electron transport layer which are sequentially arranged on the substrate, wherein the electron transport layer comprises a C60 layer, and the C60 layer is arranged close to the perovskite layer, wherein the perovskite layer (3) comprises a perovskite material and 1,3-diaminopropane dihydroiodide, and / or the perovskite cell further comprises a passivation layer (4) arranged between the perovskite layer and the C60 layer, and the passivation layer (4) comprises 1,3-diaminopropane dihydroiodide.

The embodiment of the invention provides a perovskite cell, a preparation method thereof and a laminated cell. The perovskite cell comprises a conductive substrate, an inorganic hole transport layer, an organic hole transport layer, a perovskite absorption layer, an electron transport layer and an electrode which are sequentially arranged in a preset direction. Wherein the organic hole transport layer comprises a first hole transport material and a second hole transport material; the first hole transport material comprises a carbazole hole material with a phosphate group; the second hole transport material includes (2-(pyrene-1-yl) ethyl) phosphonic acid. The perovskite cell provided by the embodiment of the invention has a good buried bottom passivation effect, so that energy levels between the hole transport layer and the perovskite absorption layer can be better matched, the carrier extraction rate is improved, the overall cell parameters are improved, and the problem of poor performance of the perovskite cell is solved. The embodiment of the invention also provides a preparation method of the perovskite cell and a laminated cell applying the perovskite cell.

The invention relates to the technical field of preparation of organic photoelectric materials, in particular to an electron transport material, an OLED with the electron transport material and an organic light-emitting device with the electron transport material. According to the electron transport material disclosed by the invention, triazinyl is taken as a framework, phenyl and cyano-substituted biphenyl is taken as a specific substituent group, methyl, adamantyl, phenyl and pyridyl are limited to be matched, and the electron transport material is used as a material for forming an electron transport layer to manufacture an organic electroluminescent device, so that the evaporation process of the device can be smoothly carried out; and the light-emitting efficiency of the organic light-emitting device is effectively improved, and the application prospect is very good.

The invention provides a method for improving the efficiency of a perovskite solar cell, and relates to the technical field of solar cells, the cell structure sequentially comprises a bottom substrate, a transparent electrode, a hole transport layer, a perovskite light absorption layer, an interface modification layer, an electron transport layer, a buffer layer and a metal electrode from bottom to top; a new additive 4-(2-aminoethyl) benzenesulfonic acid hydrochloride is introduced into the perovskite light absorption layer, the additive is introduced into the perovskite light absorption layer by being dissolved in a perovskite precursor solution, and the dosage of the additive is 0.1-1.5 mg / mL. Based on the method, the defect density of shallow energy level and deep energy level of perovskite is reduced, a more intrinsic perovskite absorption layer is formed through induction, balance extraction of electrons and holes is promoted, and then the open-circuit voltage and efficiency of the solar cell are remarkably improved.

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 discloses a perovskite light emitting diode, and belongs to the technical field of perovskite light emitting / displaying. The perovskite light-emitting diode comprises a substrate with a transparent electrode, a ZnO electron transport layer, a perovskite light-emitting layer, a hole transport layer, an anode buffer layer and an anode which are arranged in sequence. Wherein the ZnO electron transport layer is a ZnO film subjected to surface modification by adopting an organic silicon cross-linking agent (containing a functional group capable of reacting with amino to form a cross-linked network structure). The surface of the ZnO film is modified by adopting the organic silicon cross-linking agent containing the functional group which can react with the amino group to form the cross-linked network structure, and the cross-linked network structure is formed through the reaction of the functional group and the amino group, so that the mechanical property of the perovskite film is remarkably improved. The method not only enhances the flexibility and crack resistance of the perovskite thin film, but also effectively improves the binding force between the perovskite thin film and the ZnO substrate, and provides powerful support for wide application of the perovskite material in flexible devices.

The invention relates to a preparation method of a local ITO interconnected perovskite-TOPCon laminated cell, which comprises the following steps: taking an n-type monocrystalline silicon wafer as a substrate, cleaning and texturing, diffusing boron on the back to form a P + emitter, oxidizing at high temperature, and treating the surface through acid etching and alkali polishing; sequentially preparing a tunneling oxide layer and a phosphorus-doped polycrystalline silicon layer on the front surface, annealing and crystallizing, depositing an aluminum oxide film and a multi-layer silicon nitride film on the back surface after cleaning, and depositing a single-layer silicon nitride film on the front surface; preparing a back metal electrode, etching according to a designed pattern to remove a local silicon nitride film on the front surface, sequentially preparing an ITO interconnection layer, a hole transport layer, a perovskite layer, a passivation layer, an electron transport layer and an ITO transparent conductive layer on the front surface, and finally preparing a front metal electrode and solidifying to form a contact electrode. According to the invention, the problems of back corrosion risk, effective area loss and tedious process in the existing method are solved, full-size manufacturing is realized, the cell performance is improved, and industrialization is easier.

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 present disclosure provides a display substrate and a display device, which belong to the field of display technology and are intended to improve the light-emitting performance of the display substrate. The display substrate comprises: a substrate, on which a plurality of sub-pixels are arranged, and the sub-pixels comprise: a first electrode, a first light-emitting layer, a charge generation layer, a second light-emitting layer, an electron transport layer, and a second electrode; a first distance exists between a surface of the second light-emitting layer close to the charge generation layer and a surface of the electron transport layer close to the second electrode, a second distance exists between a surface of the first electrode close to the first light-emitting layer and a surface of the first light-emitting layer facing away from the charge generation layer, and a third distance exists between a surface of the first light-emitting layer facing away from the charge generation layer and a surface of the second light-emitting layer close to the charge generation layer; an absolute value of a difference between the third distance and the first distance and a ratio between an absolute value of a difference between the third distance and the second distance are within a first preset range.

The invention provides a trans-perovskite solar cell containing a fluorine arene phosphoric acid function compensation layer and a preparation method thereof, and the solar cell comprises a conductive substrate, a hole transport layer, a self-assembly monomolecular layer, a function compensation layer, a light active layer, an electron transport layer, a hole blocking layer and a back electrode which are sequentially stacked from bottom to top. The material of the function compensation layer is fluorine-containing aromatic hydrocarbon phosphoric acid. The fluorine-containing aromatic phosphoric acid provided by the invention can make up the anchoring defect on the basis of a self-assembled monomolecular layer, and can effectively passivate the defect at the bottom of perovskite through a plurality of active sites at the same time; the problem of non-ideal performance and stability caused by excessive defects at the self-assembled monomolecular layer / perovskite buried bottom interface of the trans-perovskite solar cell is solved, and a valuable scheme is provided for commercialization of the trans-perovskite solar cell in the future.

According to the perovskite solar cell and the preparation method thereof, the hole transport layer, the perovskite layer, the electron transport layer and the metal electrode are sequentially prepared on the ITO substrate, PDADI is added in the hole transport layer and the mixed SAM solution, the uniform coverage rate of the SAM on the ITO substrate is increased, the interface energy level is optimized, hole extraction is promoted, and the hole transport layer and the perovskite layer are integrated. The non-radiative recombination of an interface is reduced, the surface wettability of the hole transport layer is improved, a film with higher quality and a film with low defect density are formed, and the efficiency and the stability of a perovskite solar cell device are improved. For a perovskite solar cell, PDADI is added into an SAM solution to be mixed to serve as a hole transport layer to prepare an inverted perovskite device, PDADI is added into the mixed SAM solution, the uniform coverage rate of SAM on an ITO substrate is increased, the interface energy level is optimized, hole extraction is promoted, and non-radiative recombination of an interface is reduced.

The invention discloses an organic light-emitting device which comprises a first electrode, a second electrode and an organic layer located between the first electrode and the second electrode, and the organic layer at least comprises a light-emitting layer and an electron transport layer structure. Wherein the light-emitting layer comprises a mixture of compounds shown in the following formula I and having different deuteration rates; and the structure of the electron transport layer comprises a compound shown in the following formula II. The service life of the blue light-emitting device can be remarkably prolonged by matching the structures of the light-emitting layer and the electron transport layer.

The invention relates to the technical field of preparation of organic solar cells, in particular to an organic solar cell based on a halogenated additive, and the structure level of a forward device of the solar cell sequentially comprises a transparent conductive substrate, a hole transport layer, an organic active layer, an electron transport layer and a metal electrode from bottom to top, the organic active layer comprises a polymer donor PM6, a non-fullerene electron acceptor L8-BO and a halogenated additive DFBB. Through addition of a halogenated additive DFBB, strong non-covalent bonding is formed by unique sigma-hole interaction of the halogenated additive DFBB and a receptor L8-BO, and meanwhile, the molecular stacking orientation of the active layer can be accurately regulated and controlled by the polymer electrostatic potential extreme value of the halogenated additive DFBB. The halogenated additive DFBB preferentially generates strong sigma-hole interaction with acceptor molecules, ordered accumulation of L8-BO is remarkably enhanced, meanwhile, the crystallization behavior of the donor PM6 is balanced through the synergistic halogen effect, a bicontinuous interpenetrating network structure is formed, and the photo-generated exciton yield is improved.

The invention relates to a perovskite cell with a self-assembly monomolecular layer and a preparation method, and a perovskite assembly with the self-assembly monomolecular layer is suitable for being arranged on an external substrate, and comprises a transparent conductive layer, a hole transport layer, a perovskite active layer, an electron transport layer, a hole barrier layer, a back electrode and the self-assembly monomolecular layer. Wherein the self-assembled monomolecular layer is arranged between the hole transport layer and the perovskite active layer, a solution of a precursor of the self-assembled monomolecular layer comprises phosphorylcholine chloride and Me-4PACz, and a solvent of the precursor of the self-assembled monomolecular layer is a mixed solvent of ethanol and isopropanol; according to the invention, the phosphorylcholine chloride and the Me-4PACz are introduced, so that the interface performance, the photoelectric conversion efficiency and the long-term stability of the perovskite cell are remarkably optimized.

The present invention relates to the technical field of solar cell packaging, and in particular, to a packaging layer structure of a perovskite solar cell module and a packaging method therefor. The packaging layer structure is obtained by means of a vapor deposition method, has a simple process flow, is easy to manufacture, and reduces the production costs. The uppermost second inorganic layer of a perovskite solar cell module achieves the effect of blocking oxygen, and a protection layer between the second inorganic layer and a metal electrode layer achieves the effect of protecting the structure and efficiency of a device. A first inorganic layer is provided between an electron transport layer and the metal electrode layer, so as to inhibit the increase in the defect state density and non-radiative recombination caused by internal ion migration, thereby increasing an open-circuit voltage, and thus playing a positive role in improving the energy conversion efficiency of the perovskite solar cell module, and also blocking water. In addition, for a perovskite cell module packaged using the packaging method provided in the present invention, the stability of water and oxygen is greatly improved, and the working stability of the perovskite cell module is also improved.

The invention provides an interface regulation and control method of a perovskite solar cell, a trans-perovskite solar cell and a preparation method of the trans-perovskite solar cell. The interface regulation and control method comprises the following steps: arranging a first metal oxide nanoparticle layer between a hole transport layer and a transparent conductive film glass layer; and a second metal oxide nanoparticle layer is arranged between the hole transport layer and the perovskite light absorption layer. The trans-perovskite solar cell comprises a transparent conductive film glass layer, a first metal oxide nanoparticle layer, a hole transport layer, a second metal oxide nanoparticle layer, a perovskite light absorption layer, an electron transport layer and an electrode. According to the interface regulation and control method provided by the invention, the surface wettability of the hole transport layer is improved, the arrangement uniformity of the hole transport layer is improved, and finally the photoelectric conversion efficiency of the perovskite solar cell is improved.

The invention provides a perovskite solar cell and a preparation method thereof, a laminated solar cell and a photovoltaic module. The perovskite solar cell comprises a transparent conductive layer, a hole transport layer, a perovskite layer, an electron transport layer and an electrode layer which are stacked, wherein the hole transport layer comprises a hole transport material; the hole transport material is a polymer with the following chemical structural general formula: # imgabs0 #, in which X is O or S, 501lt; nlt; the invention also relates to a method. According to the perovskite solar cell, the hole transport material with relatively high hole mobility is introduced into the hole transport layer, and the hole transport layer does not need to be doped with any additive, so that the photoelectric conversion efficiency and the stability of the perovskite solar cell can be improved.

The invention discloses a Van der Waals material and polymer synergistically enhanced perovskite solar cell. The perovskite solar cell structurally comprises a conductive substrate layer, a hole transport layer, a perovskite light absorption layer, a polymer layer, a Van der Waals material monomolecular layer, an electron transport layer, a hole barrier layer and a back electrode from bottom to top in sequence, according to the Van der Waals material and polymer synergistically enhanced perovskite solar cell prepared by the invention, through the synergistic effect of the Van der Waals material and polymer double-layer structure, the photo-induced perovskite lattice expansion is significantly inhibited, and the stress damage of a crystal boundary region is reduced; meanwhile, the double-layer structure effectively obstructs diffusion of halide ions and provides a physical protection barrier for the perovskite thin film, so that efficient and stable preparation of the perovskite solar cell is realized.

The invention provides a perovskite solar cell. The perovskite solar cell comprises a conductive substrate; a hole transport layer; a polymer hydrophobic layer; the polymer hydrophobic layer is formed by polymer ionic liquid; a perovskite thin film layer; an electron transport layer; an electrode layer; the polymer ionic liquid comprises a structure as shown in a formula (I). Compared with the prior art, the polymer ionic liquid provided by the invention has hydrophobicity and can effectively block invasion of water vapor to a perovskite layer when being applied; secondly, a monomer in the polymer ionic liquid contains imidazole, C-H in the monomer can form hydrogen bonds with halogen atoms in the perovskite, the interaction between a polymer chain and the perovskite is enhanced, and the phase change of the perovskite is inhibited; in addition,-SO3-at one end of the polymer ionic liquid can be combined with Pb < 2 + > in perovskite through electrostatic interaction, phase change of the polymer ionic liquid is further inhibited, and Pb leakage is reduced.

The invention discloses a perovskite solar cell with all film layers prepared based on a controllable magnetron sputtering method. A perovskite solar cell with all film layers prepared based on a controllable magnetron sputtering method comprises a transparent conductive layer, an electron transport layer, a perovskite photoactive layer, a hole transport layer and a top electrode layer, and the transparent conductive layer, the electron transport layer, the perovskite photoactive layer, the hole transport layer and the top electrode layer are prepared by adopting the magnetron sputtering method. All the film layers of the perovskite solar cell provided by the invention are prepared by the magnetron sputtering method, so that other equipment is prevented from being added, and controllable preparation of all the film layers of the perovskite solar cell by the magnetron sputtering method is realized.

The purpose of the present invention is to provide a photoelectric conversion element that shows excellent photoelectric conversion characteristics and has low variation.　A photoelectric conversion element 10 according to one mode of the present invention has a structure in which a first electrode 12, a hole transport layer 13, a photoelectric conversion layer 14, an electron transport layer 15, and a second electrode 16 are layered in that order. The photoelectric conversion layer 14 includes a perovskite compound. The hole transport layer 13 includes an insulating compound and a monomolecular hole transport material. The hole transport material includes a compound represented by the chemical formula (I). (I): Ar1–(L1–X1)n. In the chemical formula (I), Ar 1 is a structure that includes an aromatic ring, atoms that constitute the aromatic ring may include heteroatoms, and Ar1 may have a substituent other than –L1–X1. n is an integer 1 or greater, and if n is 2 or greater, the structures represented by –L1–X1 may be mutually identical or different. L1 is a divalent linking group linking Ar1 and X1 or is a single bond. X1 is a group capable of chemical bonding or hydrogen bonding with a p-type metallic oxide semiconductor.

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 relates to the technical field of perovskite cells, provides a perovskite cell and a preparation method thereof, a laminated cell and a photovoltaic module, and at least can improve the efficiency of the perovskite cell. The perovskite cell comprises a transparent conductive substrate, a hole transport layer, a perovskite absorption layer, an electron transport layer and an electrode, the hole transport layer comprises a hole transport material, and the chemical formula of the hole transport material is # imgabs0 #

The invention provides a mixed halogen perovskite photovoltaic device based on mesophase regulation and a preparation method thereof. The device structure sequentially comprises a substrate, a bottom electrode layer, a hole transport layer, a self-assembly molecular layer, a perovskite layer, an interface modification layer, an electron transport layer, a buffer layer and a top electrode layer from bottom to top, when the perovskite layer is prepared, the used perovskite solution is formed by partially replacing DMSO with DMI in the perovskite solution. According to the method, the problem of non-uniform crystallization of halogen is solved through solvent engineering, and in the spin-coating stage, volatilization of DMF and DMSO can stably form a uniform DMI-PbX2 copolymerized intermediate phase. And in the annealing stage, the high-boiling-point DMI is slowly volatilized to promote the synchronous phase change of the DMI-PbX2 adduct. Due to slow crystallization speed and synchronous phase change, a halide phase WBG perovskite thin film with large crystal grains, low defects and uniformity is obtained.

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 is suitable for the technical field of solar cells, and provides a perovskite solar cell module and a preparation method thereof. The perovskite solar cell module comprises an anode, a hole transport layer, a perovskite layer, an electron transport layer and a cathode which are sequentially laminated. An optical active material used for preparing the perovskite layer is metal halide perovskite, and the specific chemical formula is Cs0. 15FA0. 85PbI3; and a cathode interface material used for preparing the cathode interface layer is quinacridone derivative (DCNQA-PyBr). According to the invention, DCNQA-PyBr is used as the cathode interface material to be applied to the perovskite (such as a Cs0. 15FA0. 85PbI3 system) solar cell module, the thick film processing of the cathode interface material can be realized, the energy conversion efficiency of the perovskite solar cell module is improved, and the cathode interface material is suitable for large-scale production and can meet the requirement of large-area industrial production.

The invention relates to a method for regulating and controlling the performance of PeLEDs by waiting time before spin-coating, which comprises the following steps: step 1, dropwise adding a perovskite precursor solution to a zinc-magnesium-oxygen electron transport layer which is prepared in advance and has acetate on the surface, standing and waiting for 8-15 seconds on the electron transport layer, the perovskite precursor solution and the electron transport layer are subjected to a pre-reaction; 2, carrying out spin-coating film formation on the perovskite precursor solution subjected to the pre-reaction treatment, and then carrying out annealing treatment on the perovskite film; the perovskite thin film is an FAPbBr3 thin film; the perovskite precursor comprises FABr and PbBr2, and the molar ratio of the FABr to the PbBr2 is greater than 2: 1. According to the method, the perovskite thin film with a smooth surface is prepared by using specific waiting time before spin coating, so that local electric injection nonuniformity is inhibited, the efficiency roll-off of the device is reduced, and the brightness of about 590000 cd m <-2 > is finally realized.

The invention provides a perovskite quantum dot perovskite thin film laminated solar cell structure and a preparation method thereof, and belongs to the technical field of perovskite laminated solar cells. Comprising a perovskite quantum dot top cell and a perovskite thin film bottom cell. The perovskite quantum dot perovskite thin film laminated solar cell structurally comprises a glass substrate, a transparent conductive film layer, a hole transport layer, a perovskite thin film layer, an electron transport layer, a buffer layer, a middle layer, a hole transport layer, a perovskite quantum dot layer, an electron transport layer, a buffer layer, a transparent electrode and a metal grid line electrode from bottom to top in sequence. According to the perovskite quantum dot perovskite thin film laminated solar cell prepared by the invention, the light absorption spectrum range is widened and the photoelectric conversion efficiency is improved through the laminated structure. The perovskite quantum dot perovskite thin film laminated solar cell prepared by the invention is simple in preparation method, low in cost and easy for large-scale preparation, and has remarkable commercial potential.