10 results about "Perovskite solar cell" patented technology

The invention relates to the field of a solar cell, and particularly to an organic-inorganic hybrid perovskite solar cell. The invention provides a tin-doped CH3NH3SnxPb1-xI3 perovskite solar cell, wherein an active layer is a tin-doped CH3NH3SnxPb1-xI3 perovskite film. The tin-doped CH3NH3SnxPb1-xI3 perovskite film has a planar heterojunction structure. The invention provides a method for preparing the tin-doped CH3NH3SnxPb1-xI3 perovskite solar cell according to a one-step method in which multiple solvent processing procedures are utilized. A high-quality perovskite film is obtained, and high photoelectric conversion efficiency is realized.

The invention discloses a planar undoped heterojunction-perovskite laminated cell and a preparation method thereof, and relates to the technical field of solar cells. The cell comprises a perovskite top-layer solar cell and a heterojunction bottom-layer solar cell which are connected together, wherein the perovskite top-layer solar cell comprises a front metal electrode layer, a first transparentconductive oxide layer, a hole transport layer, a perovskite light absorption layer and an electron transport layer which are sequentially arranged from top to bottom; the perovskite light absorptionlayer comprises a perovskite layer A, a perovskite layer B and a perovskite layer C which are sequentially arranged from top to bottom; the forbidden band width of the perovskite layer A is 2.4 to 3.0ev; the forbidden band width of the perovskite layer B is 2.0-2.6 ev, the forbidden band width of the perovskite layer C is 1.9-2.2 ev; and the forbidden band widths of the perovskite layer A, the perovskite layer B and the perovskite layer C are sequentially reduced. The perovskite solar cell has the advantages that the photoelectric conversion efficiency exceeds 28%, the open-circuit voltage ishigh, and the generating capacity is increased.

The invention discloses a perovskite solar cell and a preparation method. The solar cell comprises a transparent substrate layer, a transparent anode layer, a layer gradient hole transport layer, a perovskite light absorption layer, an electron transport layer, an electron buffer layer and a metal cathode layer, which are arranged from bottom up, wherein the above layers are mainly prepared by anevaporation process. The solar cell provided by the invention has high open circuit voltage VOC and photoelectric conversion efficiency PCE, the maximum efficiency reaching 16.8%, the open circuit voltage reaching 1.05V and good stability.

The invention provides a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises the steps of spin coating a ZnO precursor on the surface of a transparent conductive electrode to form an electron transport layer; Forming an absorbing layer on the electron transport layer, forming the absorbent layer comprises: PbI2 is dissolved in a mixed solution of dimethylformamide (DMF) and dimethyl sulfoxide (DMSO), then adding guanidine isothiocyanate, stirring and dissolving, then spin coating the mixed solution of PbI2 and guanidine isothiocyanate onto the electrontransport layer for first baking, then immersing in isopropyl alcohol (IPA) solution of CH3NH3I for second baking; forming a hole transport layer on the absorbing layer; A metal electrode is for on that hole transport layer. The perovskite solar cell provided by the invention optimizes the stability of the solar cell and improves the hysteresis effect of the solar cell.

The invention discloses an electron transport material with a core-shell structure and a perovskite solar cell containing the electron transport material. The core of the electron transport material with the core-shell structure is zinc oxide, and the shell is tin oxide. The perovskite solar cell comprises an electron transport layer, a perovskite layer and a hole transport layer, the electron transport layer comprises a compact zinc oxide seed crystal layer and a nanorod array mesoporous layer on the compact zinc oxide seed crystal layer, and the mesoporous layer is the electron transport material with the core-shell structure.

The invention relates to a metal barrier layer, which is a film layer containing at least one active metal ion of Ca, Mg, Al, Mn, Zn, Cr, Fe, Ni, Sn, Sb and Bi, wherein the thickness of the metal barrier layer is 1-30 nm, and the metal barrier layer has light transmission. The invention further discloses a perovskite solar cell using the metal barrier layer, and a preparation method of the perovskite solar cell. According to the invention, the metal barrier layer effectively prevents the metal on the upper layer from permeating to the lower layer to react with perovskite, delays the decomposition of the perovskite film, effectively reduces the chemical corrosion of perovskite to the top metal back electrode, improves the stability of the solar cell, and solves a technical problem that the perovskite solar cell is lower in stability in the air.

Provided is a device for improving perovskite film formation uniformity, including a grinder and a sheeter, wherein the grinder grinds a perovskite precursor into a powder, the sheeter presses the ground precursor powder into a precursor sheet, the sheeter includes a mold for pressing the precursor powder and a heating device, and the heating device heats a lower mold. A method of using the above device for improving perovskite film formation uniformity, and a method of preparing a perovskite solar cell are also provided. The precursor sheet prepared herein not only solves the problems of uneven particle size and uneven spreading at the bottom of the evaporation source or incomplete coverage, but also prevents splashing during vacuuming and aeration, and meanwhile, since the precursor powder is compacted, it is more conducive to the uniform conduction of heat during the heating and evaporation process, thereby improving the heat energy use efficiency.