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A light-absorbing multilayer film for large-area perovskite solar cells and its preparation method

A light-absorbing film and solar cell technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of unsatisfactory film-forming performance and environmental stability of perovskite light-absorbing materials, and cannot meet the preparation requirements. Increased temperature aging, improved performance, and improved performance effects

Inactive Publication Date: 2018-11-27
TIANJIN VOCATIONAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are relatively few varieties of monovalent cations in perovskite light-absorbing materials, and the film-forming performance and environmental stability of perovskite light-absorbing materials are not ideal, which cannot meet the requirements for the preparation of light-absorbing layers for large-area perovskite solar cells.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Coating nano-TiO with a thickness of 20-50nm on a 100mm×100mm FTO conductive glass substrate 2 Dense layer, then coated with TiO with a particle size of 40-60nm and a thickness of 100-600nm 2 The film is finally sintered at 450-550°C to form a light-absorbing multilayer film skeleton layer. Weigh CH 3 NH 3 PB 3 Dissolve 5 g of perovskite photoelectric conversion materials in 30 g of dehydrated dimethylformamide solvent, stir for 12 hours until completely dissolved, and filter through a biscuit ceramic funnel to form a light-absorbing material with a concentration of 14.3% by mass Solution, use a wire bar coater to coat the solution on the light-absorbing layer skeleton, and form a methylamine iodide lead CH with a thickness of 400nm after the solvent evaporates. 3 NH 3 PB 3 Crystalline thin films of light-absorbing materials.

[0026] Add 300g of dimethylformamide, 63.7g (0.21mol) of hydroiodic acid with a mass percent concentration of 50% and 31.7g (0.1mol) of c...

Embodiment 2

[0030] Add 300g of dimethylformamide, 63.7g (0.21mol) of hydroiodic acid with a mass percent concentration of 50% and 31.9g (0.1mol) of zinc iodide into a glass reactor, and stir at 40-60°C until completely Dissolve, then add 12.5g (0.105mol) of benzotriazole, continue to stir and react for 16 h to obtain benzotriazole zinc iodide C 6 N 3 h 7 ZnI 4 solution; concentrated in vacuo to crystallization in the solution, adding absolute ethanol to dissolve the zinc iodide benzotriazole C in the polar solvent 6 N 3 h 7 ZnI 4 Precipitated, vacuum filtered, washed with absolute ethanol, vacuum dried to obtain refined benzotriazole zinc iodide C 6 N 3 h 7 ZnI 4 crystallization.

[0031] The iodized benzotriazole zinc C prepared above 6 N 3 h 7 ZnI 4 Crystallization 5g, be dissolved in 30g through the dimethyl formamide solvent of dehydration treatment, finely filter with bisque ceramic funnel, will be coated on the lead CH 3 NH 3 PB 3 On the light-absorbing material cry...

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Abstract

The invention relates to a perovskite solar cell light-absorbing multilayer film composed of a three-dimensional perovskite light-absorbing film / two-dimensional perovskite light-absorbing film / polyurethane complex film and a preparation method thereof. In the present invention, the composition of the two-dimensional perovskite light-absorbing film is NMX4, wherein N is an imidazole or triazole compound; M is Pb2+, Sn2+, Ge2+, Cu2+, Ni2+, Mn2+, Zn2+, Fe2+ or a mixture thereof; X is Cl- , Br‑, I‑ or mixtures thereof. In the present invention, the polyurethane complex film is a hydrophobic inorganic-organic covalent compound film formed in situ by coating an isocyanate compound solution on a two-dimensional perovskite light-absorbing film, which can be used as a hole transport layer for a perovskite solar cell . In the present invention, the polymerization reaction of isocyanate is used to remove residual raw materials and form a hole transport layer, which simplifies the preparation process of large-area perovskite solar cells.

Description

technical field [0001] The invention relates to a perovskite solar cell light-absorbing multilayer film composed of a three-dimensional perovskite light-absorbing film / two-dimensional perovskite light-absorbing film / polyurethane complex film and a preparation method thereof, belonging to new energy and new technologies material field. technical background [0002] The current photoelectric conversion efficiency of perovskite solar cells has exceeded 28%, and it is expected to reach 50% in the future, becoming a new hope for the solar cell industry. Perovskite solar cells are usually composed of five parts: transparent conductive glass, dense layer, perovskite light absorbing layer, hole transport layer, and metal back electrode. The thickness of the perovskite light-absorbing layer is generally 200-600nm, and its main function is to absorb sunlight and generate electron-hole pairs, and can efficiently transport electron-hole pairs. [0003] The most commonly used perovskit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K30/00Y02E10/549
Inventor 李建生何涛李无为
Owner TIANJIN VOCATIONAL INST