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Bulk-phase heterojunction perovskite solar cell and preparation method thereof

A bulk heterojunction and solar cell technology, applied in the field of solar cells, can solve problems such as low photoelectric conversion efficiency, increased cell manufacturing costs, and complex processes

Pending Publication Date: 2021-04-27
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The photoelectric conversion efficiency of currently reported lead-free perovskite solar cells is generally lower than that of lead-containing perovskite solar cells, although through the management of light transmission paths, high-efficiency solar cells can be prepared with thinner lead-containing perovskite light-absorbing layers. Batteries, but the process is complicated, which will greatly increase the cost of battery production

Method used

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preparation example Construction

[0026] A method for preparing a bulk heterojunction perovskite solar cell, comprising the following steps:

[0027] Step 1. Disperse 1-10 g of N-type semiconductor nanocrystal particles with a particle size of 10-20 nm in deionized water to prepare a dispersion of N-type semiconductor nanocrystal particles with a concentration of 10-50 mg / mL, and add Equal volume of dopamine hydrochloride aqueous solution with a concentration of 10-100mg / mL, adjust the pH of the solution to 8.5 with ammonia water or sodium hydroxide, stir and react at a speed of 2000-3000 rpm for 1-4 hours, and then stir at a speed of 6000-10000 Centrifuge at a speed of rpm for 0.5 to 1 hour, collect the precipitate obtained by centrifugation, and obtain polydopamine-modified N-type semiconductor nanocrystal particles, which are wrapped with a 3-20 nm thick polydopamine layer;

[0028] Step 2. Disperse 1 to 10 g of insulator nanocrystal particles with a particle size of 10 to 20 nm in deionized water to prepar...

Embodiment 1

[0036] A method for preparing a bulk heterojunction perovskite solar cell, comprising the following steps:

[0037] Step 1, first 1g of TiO with a particle size of 10nm 2 The nanocrystals were dispersed in 100 mL of deionized water to prepare TiO at a concentration of 10 mg / mL 2 To the nanocrystal dispersion, add 100 mL of dopamine hydrochloride aqueous solution with a concentration of 10 mg / mL, adjust the pH of the solution to 8.5 with ammonia water, stir and react at a speed of 2000 rpm for 2 hours, and then react at a speed of 10000 rpm Centrifuge for 0.5 hours, collect the precipitate obtained by centrifugation, and obtain polydopamine-modified TiO 2 Nanocrystalline particles, TiO 2 Nanocrystalline particles are wrapped with a polydopamine layer with a thickness of 3-5nm;

[0038] Step 2, then 1g of SiO with a particle size of 10nm 2 The nanocrystals were dispersed in 100 mL of deionized water to prepare SiO at a concentration of 10 mg / mL 2 To the nanocrystal dispersi...

Embodiment 2

[0048] A method for preparing a bulk heterojunction perovskite solar cell, comprising the following steps:

[0049] Step 1, first 1g of SnO with a particle size of 15nm 2 The nanocrystals were dispersed in 50 mL of deionized water to prepare SnO at a concentration of 20 mg / mL 2 Nanocrystal dispersion liquid, add 50mL thereinto, concentration is the dopamine hydrochloride aqueous solution of 40mg / mL, adjust the pH of solution to 8.5 with 1mol / L sodium hydroxide solution, stir reaction 4 hours under the rotating speed of 3000 rev / min, then in Centrifuge at a speed of 6000 rpm for 0.5 hours, collect the precipitate obtained by centrifugation, and obtain polydopamine-modified SnO 2 Nanocrystalline particles, SnO 2 Nanocrystalline particles are wrapped with a polydopamine layer with a thickness of 10-12nm;

[0050] Step 2, then 1g of Al with a particle size of 15nm 2 o 3 The nanocrystals were dispersed in 50 mL of deionized water and prepared at a concentration of 20 mg / mL of ...

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Abstract

The invention discloses a bulk-phase heterojunction perovskite solar cell, which is characterized in that a filling pore channel is formed in a cell skeleton, and the filling pore channel is formed by high-temperature thermal decomposition of a polydopamine layer wrapping the surface of a nanocrystalline material corresponding to each functional layer (an electron transport layer, an insulation isolation layer and a hole transport layer); each filling pore channel is filled with an organic-inorganic hybrid or full-inorganic perovskite light absorption material to form a bulk-phase heterojunction in which the perovskite light absorption layer penetrates through each functional layer (the electron transport layer, the insulation isolation layer and the hole transport layer), and under the condition that the thickness of the perovskite light absorption layer is kept unchanged, the perovskite light absorption layer can be used as a perovskite solar cell. The use amount of the lead-containing perovskite light absorption layer material can be reduced to 10-30% of the use amount of a traditional mesoscopic and planar heterojunction perovskite solar cell, and meanwhile, the formed bulk heterojunction has a good interface contact state, so high photoelectric conversion efficiency of the solar cell can be ensured. The invention further discloses a preparation method of the bulk-phase heterojunction perovskite solar cell.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a bulk heterojunction perovskite solar cell and a preparation method thereof. Background technique [0002] Perovskite solar cells are a new type of solar cells, which use organic-inorganic hybrid or all-inorganic perovskite as light-absorbing materials, and electron-transporting materials and hole-transporting materials to form solar cells. Perovskite solar cells have the characteristics of low cost, simple preparation process, and high photoelectric conversion efficiency, so they have good application prospects and are expected to replace existing high-cost solar cells. [0003] Perovskite solar cells are divided into mesoscopic and planar heterojunction structures, which are divided into formal structures according to the stacking order of each functional layer on the conductive glass (conductive glass / electron transport layer / perovskite light absorption layer / hole transpo...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/48H01L31/0216H01L31/072H01L31/18
CPCH01L31/02167H01L31/072H01L31/1876H10K71/00H10K30/10Y02E10/549Y02P70/50
Inventor 兰章吴季怀
Owner HUAQIAO UNIVERSITY
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