Modified perovskite-structure photoelectric conversion material and preparation method thereof

A perovskite structure, photoelectric conversion technology, applied in photovoltaic power generation, circuits, electrical components and other directions, can solve the problems of difficult to control distribution, low photoelectric conversion ability, easy to agglomerate, etc. Transmission efficiency, the effect of expanding the dispersion area

Active Publication Date: 2016-04-20
南京点援微材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When using a material with a perovskite structure as a photoelectric conversion material, if a solution of a pure perovskite structure crystal is used to coat the substrate, it is easy to cause excessive dispersion of perovskite structure crystal particles in the solution. It is easy to agglomerate, and the phenomenon of low photoelectric conversion ability due to less dispersion makes it difficult to obtain ideal application performance. At the same time, the adhesion between the perovskite crystal layer and the substrate material coated as a light-absorbing material in long-term applications will also weaken. There is detachment from the substrate material, which also restricts the application ability of perovskite structure materials as photoelectric conversion materials
[0005] In order to solve this problem, some studies have carried out in-depth research on photoelectric conversion materials with a modified perovskite structure. A perovskite crystal supported on TiO 2 The technical solution in mesopores, this technical solution increases the effective amount of perovskite crystals in application, partially solves the defects of direct coating of crystal solution, and can obtain higher theoretical efficiency, but the perovskite crystal in this solution Ore crystals in TiO 2 The distribution in the mesopores is difficult to control, and perovskite crystal grains may still appear to accumulate on the surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Put the magnesium-aluminum hydrotalcite purchased from the market into an oven, and spread a layer of metal lead directly below it that does not contact it. There is an opening directly above the oven to allow oxygen to pass through, and the temperature in the oven is raised to 400 ° C. , and feed oxygen from the inlet directly above the oven, and maintain the above conditions for 4 hours to obtain the modified hydrotalcite oxide; then put the modified hydrotalcite oxide into the ethanol solution, and the modified hydrotalcite oxide and ethanol The mass ratio of the solution is 1:4, and the mass percentage of water in the ethanol solution is 5%, and it is airtightly left at room temperature for 24h, and thereafter in N 2 Dry under protection, put PbCl after drying 2 Soak in the γ-butyrolactone solution for 30min, PbCl in the solution 2 The concentration is 1.0mol / L, then add CH 3 NH 3 Soak in the γ-butyrolactone solution of Cl for 20min, CH in the solution 3 NH 3 T...

Embodiment 2

[0036] Put the magnesium aluminum hydrotalcite prepared by the co-precipitation method into an oven, and spread a layer of metallic lead directly below it that does not contact it. There is an opening directly above the oven to allow oxygen to pass through, and the temperature in the oven is raised to 400 ℃, and oxygen is introduced from the inlet directly above the oven, and the above conditions are maintained for 4 hours to obtain the modified hydrotalcite oxide; after that, the modified hydrotalcite oxide is put into the ethylene glycol solution, and the modified hydrotalcite is oxidized The mass ratio of substance and ethylene glycol solution is 1:3, and the mass percent of heavy water in ethylene glycol solution is 5%, and it is airtight and stands still at room temperature for 24h, and thereafter in N 2 Dry under protection, put PbCl after drying 2 Soak in the γ-butyrolactone solution for 30min, PbCl in the solution 2 The concentration is 1.5mol / L, then add CH 3 NH 3 ...

Embodiment 3

[0038] Put the magnesium-aluminum hydrotalcite purchased from the market into an oven, and spread a layer of metallic lead directly below it without contact with it. There is an opening directly above the oven to allow oxygen to flow in, and the temperature in the oven is raised to 500°C. , and feed oxygen from the inlet directly above the oven, and maintain the above conditions for 2 hours to obtain the modified hydrotalcite oxide; then put the modified hydrotalcite oxide into the ethanol solution, and the modified hydrotalcite oxide and ethanol The mass ratio of the solution is 1:4, and the mass percentage of water in the ethanol solution is 8%, and it is airtightly left at room temperature for 24h, and thereafter in N 2 Dry under protection, put in PbBr after drying 2 Soak in the γ-butyrolactone solution for 60min, PbBr in the solution 2 The concentration is 1.0mol / L, then add CH 3 NH 3 Soak in Br's γ-butyrolactone solution for 30min, CH in the solution 3 NH 3 The conc...

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PUM

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Abstract

The invention discloses a modified perovskite-structure photoelectric conversion material and a preparation method thereof, and belongs to the field of photoelectric conversion materials, especially perovskite-structure photoelectric conversion materials. A modified photoelectric conversion material of a special structure and high photoelectric conversion efficiency is prepared by a technical scheme as follows: hydrotalcite is modified and oxidized, and the crystal structure of hydrotalcite is recovered in a solution; hydrotalcite exchanges ions in a solution with lead halide forming one precursor of a perovskite-structure crystal; and hydrotalcite reacts with methylamine halide forming the other precursor of the perovskite-structure crystal to form a perovskite-structure crystal of a hydrotalcite interlayer.

Description

technical field [0001] The invention belongs to the field of photoelectric conversion materials, in particular to the field of photoelectric conversion materials with a perovskite structure. Background technique [0002] Photoelectric conversion materials mainly convert light energy to electrical energy. After decades of development, the current main photoelectric conversion materials include single crystal / polycrystalline silicon, gallium arsenide, cadmium telluride, copper indium gallium selenide, sensitizing dyes, etc. In addition to single crystal / polycrystalline silicon, other types of photoelectric conversion materials need to use some raw materials that are difficult to obtain and scarce resources, the preparation efficiency is low, and the stability of the material is poor, which limits its practical application and was used earlier. The production cost of monocrystalline silicon / polycrystalline silicon materials is relatively high, so finding new photoelectric conve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/48
CPCH10K85/30Y02E10/549
Inventor 陈庆曾军堂叶任海陈兵
Owner 南京点援微材料科技有限公司
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