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Perovskite solar cell with cuprous sulfide-doped perovskite layer and preparation method thereof

A solar cell and cuprous sulfide technology, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of restricting the efficiency of perovskite solar cells, high cost, and low device success rate, and achieve the reduction of defect state depth and load capacity. Probability of carrier recombination, suppression of charge recombination, and effect of improving efficiency

Inactive Publication Date: 2019-06-14
杨富强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the solar cells based on perovskite materials adopt the following structure: FTO / TiO 2 / Perovskite / HTM / Au, the cost of FTO is higher for batteries with this structure, and TiO needs to be sintered on FTO 2 , the sintering temperature is above 450°C, secondly, the HTM layer material used in this structure is very expensive, and the film-forming performance of pure perovskite is very poor, the success rate of device fabrication is very low, and local short circuit is easy to occur. The perovskite polycrystalline film formed during the battery preparation process often has a large number of grain boundaries, and the unsaturated halide ions and metal ions in the grain boundaries will induce the formation of defect states, thereby greatly increasing the recombination of carriers. probability, restricting the further improvement of the efficiency of perovskite solar cells

Method used

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  • Perovskite solar cell with cuprous sulfide-doped perovskite layer and preparation method thereof
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Embodiment 1

[0032] A preparation method of a perovskite solar cell doped with cuprous sulfide in a perovskite layer, comprising the steps of:

[0033] 1) The ITO substrate was ultrasonically cleaned with deionized water, absolute ethanol, and acetone in sequence, and then the ITO substrate was dried with nitrogen to obtain an ITO substrate layer;

[0034] 2) the CuInS 2 The precursor solution was spin-coated on the ITO base layer obtained in step 1), the rotation speed was 2000rpm, and the time was 20s, spin-coating once, and then baked at 100°C for 10min after spin-coating to obtain ITO / CuInS 2 layer;

[0035] CuInS 2 The configuration method of the precursor solution is as follows, dissolve 0.1mmol indium acetate, 0.5mmol thiourea and 40 μL acetic acid in 0.6mL butylamine, and perform ultrasonic dispersion to form a homogeneous solution, and then add 0.1mmol cuprous iodide into the above solution.

[0036] 3) ITO / CuInS obtained in step 2) 2 Spin-coated mesoporous TiO 2 Gel solutio...

Embodiment 2

[0044] A preparation method of a perovskite solar cell doped with cuprous sulfide in a perovskite layer, comprising the steps of:

[0045] 1) The ITO substrate was ultrasonically cleaned with deionized water, absolute ethanol, and acetone in sequence, and then the ITO substrate was dried with nitrogen to obtain an ITO substrate layer;

[0046] 2) the CuInS 2 The precursor solution was spin-coated on the ITO base layer obtained in step 1), the rotation speed was 3000rpm, and the time was 10s, spin-coated 3 times, and then baked at 90°C for 10min after spin-coating to obtain ITO / CuInS 2 layer;

[0047] CuInS 2 The configuration method of the precursor solution is as follows, dissolve 0.08mmol indium acetate, 0.4mmol thiourea and 50μL acetic acid in 0.4mL butylamine, and perform ultrasonic dispersion to form a homogeneous solution, and then add 0.09mmol cuprous iodide into the above solution.

[0048] 3) ITO / CuInS obtained in step 2) 2 Spin-coated mesoporous TiO 2 Gel solut...

Embodiment 3

[0054] A preparation method of a perovskite solar cell doped with cuprous sulfide in a perovskite layer, comprising the steps of:

[0055]1) The ITO substrate was ultrasonically cleaned with deionized water, absolute ethanol, and acetone in sequence, and then the ITO substrate was dried with nitrogen to obtain an ITO substrate layer;

[0056] 2) the CuInS 2 The precursor solution was spin-coated on the ITO base layer obtained in step 1) at a speed of 2500rpm for 15s, spin-coated twice, and then baked at 100°C for 10min after spin-coating to obtain ITO / CuInS 2 layer;

[0057] CuInS 2 The configuration method of the precursor solution is as follows. Dissolve 0.12mmol indium acetate, 0.6mmol thiourea and 30μL acetic acid in 0.8mL butylamine, and perform ultrasonic dispersion to form a homogeneous solution, and then add 0.13mmol cuprous iodide into the above solution.

[0058] 3) ITO / CuInS obtained in step 2) 2 Spin-coated mesoporous TiO 2 Gel solution, the rotation speed is...

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Abstract

The invention discloses a perovskite solar cell with a cuprous sulfide-doped perovskite layer and a preparation method thereof. The perovskite solar cell comprises an ITO base layer, a CuInS2 layer, amesoporous TuO2 layer, a cuprous sulfide-perovskite composite layer and a silver layer from bottom to top, wherein the CuInS2 layer is arranged on the ITO base layer; the mesoporous TuO2 layer is arranged on the CuInS2 layer; the cuprous sulfide-perovskite composite layer is arranged on the mesoporous TuO2 layer; the silver layer is arranged on the cuprous sulfide-perovskite composite layer; andthe perovskite is CH3NH3PbI3. A cuprous iodide-thiourea complex is added in precursor solution of the perovskite, and Cu+ and I- in the complex respectively interact with unsaturated halide ions and lead ions in a perovskite crystal boundary to form bulk-heterojunctions, thereby greatly reducing the defect mode depth of the perovskite and carrier recombination probability, and then enhancing the device performance.

Description

technical field [0001] The invention relates to the technical field of perovskite solar cells, in particular to a perovskite solar cell in which cuprous sulfide is doped into a perovskite layer and a preparation method thereof. Background technique [0002] Since petrochemical energy is a non-renewable resource, with the increasing consumption of petrochemical energy, the development and utilization of new energy has always been the focus of scientific researchers. At present, solar energy, as a clean energy, has been proven to be a substitute to a certain extent. Petrochemical energy, while solar cells are an effective way to utilize solar energy. At present, silicon-based inorganic solar cells are relatively mature, and the conversion efficiency can reach 25-30%. However, the production cost of silicon-based solar cells is high, and its rigidity Too large to bend, etc. have limited the large-scale application of silicon-based solar cells. [0003] In 2009, the research te...

Claims

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Application Information

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IPC IPC(8): H01L51/00H01L51/42H01L51/48
CPCY02E10/549
Inventor 杨富强
Owner 杨富强
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