Search

CN-122003071-A - Fe (Fe)2O3Nanorod array perovskite solar cell and preparation method thereof

CN122003071ACN 122003071 ACN122003071 ACN 122003071ACN-122003071-A

Abstract

The invention relates to the field of photovoltaic power generation, in particular to a Fe 2 O 3 nano rod array perovskite solar cell and a preparation method thereof. Aiming at the problems of complex process, higher cost and low production efficiency of the physical coating technology in the prior art, the preparation method of the Fe 2 O 3 nano rod array perovskite solar cell is provided. The perovskite solar cell with the Fe 2 O 3 nanorod array is prepared by preparing a Nb-TiO 2 compact layer by a hydrolysis-pyrolysis method, preparing a Fe 2 O 3 nano array by a hydrothermal method, preparing a CH 3 NH 3 PbI 3 -xBrx film by a continuous two-step deposition method and preparing a hole transport layer by a deposition method. The invention has the advantages of simple and environment-friendly process, low cost and high production efficiency.

Inventors

  • LIU CHAO
  • LI YUAN
  • FENG JIE
  • TIAN WUHONG
  • WANG YILE
  • CHENG PENG
  • WANG YU
  • Qin Yaozhuo
  • HU WENJING
  • LIU YANG
  • FU ZIYU
  • SHI GUOXING
  • QIN CAN

Assignees

  • 国网山西省电力公司长治供电公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (9)

  1. 1. The preparation method of the Fe 2 O 3 nano rod array perovskite solar cell is characterized by comprising the following steps of: (1) Etching and cleaning a conductive substrate; (2) Coating an acidic isopropanol solution of niobium pentachloride and isopropyl titanate on the conductive substrate prepared in the step (1), putting the conductive substrate into a closed hydrothermal reaction kettle, adding deionized water, heating to 160-200 ℃ and keeping the temperature for 4-12 hours to prepare a preliminary compound, carrying out heating reflux reaction in a nitrogen atmosphere, and keeping the temperature for 2-6 hours at 300-600 ℃ to enable Nb-TiO 2 to form a compact lamellar structure; (3) Coating an acidic isopropanol solution of ferric nitrate and isopropyl titanate on the Nb-TiO 2 compact layer prepared in the step (2), putting the compact layer into a closed hydrothermal reaction kettle, adding deionized water, and heating to 120-200 ℃ for 4-12 hours; (4) Preparing a CH 3 NH 3 PbI 3 -xBrx film, namely preparing a CH 3 NH 3 PbI 3 -xBrx perovskite film with a molar ratio of CH 3 NH 3 I：CH 3 NH 3 Br=85:15 on a Fe 2 O 3 nano array by adopting a two-step continuous deposition method; (5) And (3) preparing a hole transport layer, namely coating a spiro-OMeTAD solution on the dense Nb-TiO 2 layer and the CH 3 NH 3 PbI 3 -xBrx film which are prepared in the steps (1) - (4) and deposited in sequence to prepare the hole transport layer.
  2. 2. The preparation method of the perovskite solar cell is characterized in that in the step (1), zinc powder and 1-6 mol/L hydrochloric acid are used for etching a conductive substrate according to a pattern required by a perovskite solar cell structure, and then ultrasonic cleaning and nitrogen blow-drying are carried out for later use.
  3. 3. The method of claim 1, wherein in step (1), the conductive substrate is any one of ITO, FTO, AZO.
  4. 4. The method of claim 3, wherein in step (1), the conductive substrate is FTO.
  5. 5. The method according to claim 1, wherein in the step (2), the molar ratio of niobium pentachloride to isopropyl titanate is (3 to 7): 1.
  6. 6. The method according to claim 1, wherein in the step (3), the molar ratio of the ferric nitrate to the isopropyl titanate is (3-7): 1.
  7. 7. The preparation method according to claim 1, wherein in the step (4), the preparation method specifically comprises the steps of mixing methyl amine iodide CH 3 NH 3 I and lead iodide PbI 2 , dissolving the mixture in a mixed solvent of N, N-dimethylformamide DMF and dimethyl sulfoxide DMSO to form CH 3 NH 3 PbI 3 perovskite precursor liquid, coating the CH 3 NH 3 PbI 3 perovskite precursor liquid on the Fe 2 O 3 nano array prepared in the step (3), placing the CH 3 NH 3 PbI 3 perovskite film on a hot bench, sequentially annealing the CH 3 NH 3 PbI 3 perovskite film in an air atmosphere for 25-40min, annealing the CH 3 NH 3 PbI 3 perovskite film in a mixed hot vapor of DMSO, HBr and H 2 O containing air for 3-8min, annealing the CH 3 NH 3 PbI 3 perovskite film in a mixed hot vapor containing air for 10min, and annealing the CH 3 NH 3 PbI 3 -xBrx film in a mixed hot vapor of CH 3 NH 2 and H 2 O containing air, wherein the temperature of the hot bench is always kept at 100 ℃, and the cleaning process is combined with a multi-step atmosphere annealing treatment process.
  8. 8. The method according to claim 1, wherein the heat treatment is performed after the coating of the CH 3 NH 3 PbI 3 -xBrx film with the spiro-ome tad solution.
  9. 9. An Fe 2 O 3 nanorod array perovskite solar cell produced according to the production method of any one of claims 1 to 8.

Description

Fe 2O3 nano rod array perovskite solar cell and preparation method thereof Technical Field The invention relates to the field of photovoltaic power generation, in particular to a Fe 2O3 nano rod array perovskite solar cell and a preparation method thereof. Background The perovskite solar cell has the advantages of simple structure, easily-adjustable band gap, high light absorption coefficient, low preparation cost and the like, and is widely focused and researched in a large amount since first report in 2009, the photoelectric conversion efficiency of the perovskite solar cell breaks through from the original 3.8% to the current 25%, and the perovskite solar cell is close to the photoelectric conversion efficiency of a silicon-based solar cell, so that the perovskite solar cell has a good application prospect. The electron transport layer of perovskite solar cells generally has a flat plate structure, a mesoporous structure, and a one-dimensional array structure, wherein the one-dimensional array structure has a higher specific surface area and more direct radial electron transport. Compared with a flat plate structure, the one-dimensional array structure can effectively increase the contact area with the perovskite material due to the higher specific surface area, is favorable for the transmission and separation of carriers, and provides more direct and ordered radial transmission channels for electron transmission compared with a mesoporous structure, and enhances the electron injection from the perovskite material to the electron transmission material, thereby improving the photovoltaic performance of the corresponding perovskite solar cell. The Chinese patent with the application number of CN201510100147.2 discloses a preparation method of a perovskite solar cell quasi-one-dimensional TiO 2 nano-structure array skeleton layer, wherein a TiO 2 compact layer and a Ti metal film are sequentially prepared on a conductive glass substrate by adopting physical film plating technologies such as magnetron sputtering, vacuum thermal evaporation, pulse laser deposition and the like, and then the Ti metal film is oxidized into a quasi-one-dimensional TiO 2 nano-structure array serving as the skeleton layer of the perovskite solar cell by adopting a solution oxidation method. And preparing a perovskite type organic metal halide light absorption layer, a hole transmission layer and a counter electrode on the framework layer to obtain the perovskite solar cell. The quasi-one-dimensional TiO 2 nano-structure array skeleton layer prepared by the method can improve carrier transmission speed, reduce carrier recombination probability and the like, and improve carrier collection efficiency and photoelectric conversion efficiency of the perovskite solar cell. However, these physical plating techniques are complex in process, high in cost and low in production efficiency. Disclosure of Invention The invention provides an environment-friendly fire-resistant power cable, which aims to solve the problems of complex process, higher cost and low production efficiency of a physical coating technology in the prior art, has excellent fire resistance through optimization of materials and structures, and reduces the cost. In order to achieve the above purpose, the present invention adopts the following technical scheme: In a first aspect, the invention provides a method for preparing a perovskite solar cell with an Fe 2O3 nano rod array, which comprises the following steps: (1) Etching and cleaning a conductive substrate; (2) Coating an acidic isopropanol solution of niobium pentachloride and isopropyl titanate on the conductive substrate prepared in the step (1), putting the conductive substrate into a closed hydrothermal reaction kettle, adding deionized water, heating to 160-200 ℃ and keeping the temperature for 4-12 hours to prepare a preliminary compound, carrying out heating reflux reaction in a nitrogen atmosphere, and keeping the temperature for 2-6 hours at 300-600 ℃ to enable Nb-TiO 2 to form a compact lamellar structure; (3) Coating an acidic isopropanol solution of ferric nitrate and isopropyl titanate on the Nb-TiO 2 compact layer prepared in the step (2), putting the compact layer into a closed hydrothermal reaction kettle, adding deionized water, and heating to 120-200 ℃ for 4-12 hours; (4) Preparing a CH 3NH3PbI3 -xBrx film, namely preparing a CH 3NH3PbI3 -xBrx perovskite film with a molar ratio of CH 3NH3I：CH3NH3 Br=85:15 on a Fe 2O3 nano array by adopting a two-step continuous deposition method; (5) And (3) preparing a hole transport layer, namely coating a spiro-OMeTAD solution on the dense Nb-TiO 2 layer and the CH 3NH3PbI3 -xBrx film which are prepared in the steps (1) - (4) and deposited in sequence to prepare the hole transport layer. Preferably, in the step (1), the conductive substrate is etched by zinc powder and 1-6 mol/L hydrochloric acid according to a pattern required by a perovskite solar cell structure,