Large-area composite light absorption layer of perovskite solar cell and preparation method thereof

A technology for solar cells and light-absorbing layers, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of poor film-forming performance of perovskite light-absorbing materials and inability to meet engineering coating requirements, and achieve good space Hole carrier transport performance, compensating film-forming performance and stability, smooth and smooth surface

Inactive Publication Date: 2017-02-15
TIANJIN VOCATIONAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the photoelectric conversion efficiency data of perovskite solar cells are constantly being refreshed, there are still relatively few types of organic cations in perovskite-type light-absorbing materials. Engineering Coating Requirements for Light Absorbing Layers of 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 thin film is finally sintered at 450-550° C. to form the skeleton layer of the light absorbing layer. Weigh CH 3 NH 3 PB 3 Dissolve 5 g of perovskite-type light-absorbing 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 light-absorbing material solution on the light-absorbing layer skeleton, and form a methylamine iodide lead CH with a thickness of 300nm 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 ...

Embodiment 2

[0029] 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 thin film is finally sintered at 450-550° C. to form the skeleton layer of the light absorbing layer. Weigh formamidine bromide lead CH(NH 2 ) 2 PbBr 3 Dissolve 5 g of perovskite-type light-absorbing materials in 30 g of dehydrated dimethyl sulfoxide solvent, stir for 12 hours until completely dissolved, filter through a biscuit ceramic funnel, and use a stainless steel wire rod applicator to spread the light-absorbing material solution Coated on the skeleton of the light-absorbing layer, the solvent evaporates to form lead formamidine bromide CH(NH) with a thickness of 500nm 2 ) 2 PbBr 3 Crystalline thin films of light-absorbing materials.

[0030] Add 200g of dimethyl sulfoxide, 63.7g (0.21mol) of hydroiodic acid with a mass percent concentration of 50% and 46.1g (0.1m...

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Abstract

The invention relates to a composite light absorption layer of a perovskite solar cell and a preparation method thereof, wherein the composite light absorption layer is formed by a three-dimensional perovskite type light absorption material film and a novel two-dimensional perovskite type light absorption material film. A light absorption layer skeleton is coated with the three-dimensional perovskite type light absorption material film; and the three-dimensional perovskite type light absorption material film is coated with the two-dimensional perovskite type light absorption material film to form a hole transport layer. The two-dimensional perovskite type light absorption material film is made of NMX4, wherein the N is one of thiourea, 2,5-Dithiobiurea, thiocarbohydrazide, or beta-aminoethyl isothiourea, the M expresses Pb<2+>, Sn<2+>, Ge<2+>, Cu<2+>, Ni<2+>, Mn<2+>, Zn<2+>, Fe<2+>, Sb<3+>, and Bi<3+>, or a mixture; a, and the X represents a CI<->, Br<->, I <->, or a mixture. According to the invention, with the perovskite composite light absorption layer, the photoelectric conversion efficiency is stabilized and improved.

Description

technical field [0001] The invention relates to a perovskite solar cell composite light-absorbing layer composed of a three-dimensional perovskite-type light-absorbing material film and a novel two-dimensional perovskite-type light-absorbing material film and a preparation method thereof, belonging to the field of new energy and new materials. [0002] technical background [0003] 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. The typical molecular for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46
CPCH10K71/12H10K30/451H10K30/87Y02E10/549
Inventor 李建生佟玉洁王少杰
Owner TIANJIN VOCATIONAL INST
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