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A kind of all-inorganic perovskite solar cell and preparation method thereof

A solar cell and inorganic calcium technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of photovoltaic performance attenuation, poor structural stability of solar cells, etc., achieve less defect state density, excellent air stability, and increase current flow Effect

Inactive Publication Date: 2021-04-20
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of all-inorganic perovskite solar cell and preparation method thereof; This battery and preparation method are used to solve the problem of CsPbI 2 The structural stability of Br all-inorganic perovskite solar cells is poor, leading to the problem of attenuation of its photovoltaic performance

Method used

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  • A kind of all-inorganic perovskite solar cell and preparation method thereof
  • A kind of all-inorganic perovskite solar cell and preparation method thereof
  • A kind of all-inorganic perovskite solar cell and preparation method thereof

Examples

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Embodiment 1

[0052] First, the complex PbI 2 (DMSO) preparation: 4.84g PbI 2 Dissolve in 15mL DMSO, heat to PbI at 60°C 2 Dissolve completely, and then slowly add about 35mL of toluene to it, and a white precipitate appears. After the precipitate is completely precipitated, filter the precipitate, place the precipitate at room temperature for 3 hours, and then dry it in vacuum at 60°C for 24 hours to obtain PbI 2 (DMSO) complex.

[0053] Second, the complex PbBr 2 (DMSO) preparation: 3.85g PbBr 2 Dissolve in 15mL DMSO, heat to PbBr at 60°C 2 Completely dissolve, then slowly add about 35mL of hot acetone to it, and a white precipitate appears. After the precipitate is completely precipitated, filter the precipitate, place the precipitate at room temperature for 3 hours, and then dry it in vacuum at 60°C for 24 hours to obtain PbI 2 (DMSO) complex.

[0054] Third, 0.242g complex PbI 2 (DMSO), 0.200g complex PbBr 2 (DMSO) and 0.234g CsI dissolved in 150μL DMSO and 850μL DMF, where CsP...

Embodiment 2

[0074] In the present embodiment, the thickness of the gold electrode is 70nm, and the content of doped Ni is 0.0028g, in terms of moles, NiI 2 The amount added is CsPbI 2 1% (mol fraction) of Pb content in the Br precursor solution, other steps are identical with embodiment 1. In this example, the efficiency of the inorganic perovskite solar cell was 14.26%.

Embodiment 3

[0076]In this embodiment, the thickness of the gold electrode is 90nm, and the specific spin-coating process of the Ni-doped inorganic perovskite precursor solution is 1000rpm low-speed spin-coating for 10s, and 4000rpm high-speed spin-coating for 30s. Other steps are identical with embodiment 1. In this example, the efficiency of the inorganic perovskite solar cell was 15.77%.

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Abstract

The invention discloses an all-inorganic perovskite solar cell and a preparation method thereof. Compared with the existing CsPbI 2 Br all-inorganic perovskite solar cell, the perovskite cell has a low density of defect states and can exhibit excellent stability in an environment with high humidity. The all-inorganic perovskite solar cell in CsPbI 2 The Br perovskite absorber layer is doped with Ni element, so that in the crystallized perovskite absorber layer, Ni is enriched at the perovskite grain boundary. On the one hand, Ni element is generated at the defect position, so that the defect at the grain boundary cannot be diffused. ; At the same time, part of the Pb ions at the grain boundaries are replaced by Ni ions with smaller radii, which improves the CsPbI at the grain boundaries. 2 Tolerance factor of Br perovskite relative to Ni-doped CsPbI 2 For Br all-inorganic perovskite solar cells, the tolerance factor is closer to 1, which greatly improves the phase stability of inorganic perovskite thin films.

Description

【Technical field】 [0001] The invention belongs to the technical field of thin-film solar cells, and in particular relates to an all-inorganic perovskite solar cell and a preparation method thereof. 【Background technique】 [0002] In order to solve the current social problems of resource shortage and environmental degradation, people are turning their attention to new, clean and renewable green energy. Therefore, solar cells have become a research hotspot. As a new energy material, perovskite photovoltaic materials have the advantages of high mobility, high light absorption coefficient, and low cost, so they have attracted everyone's attention. In 2009, organometallic halide CH with perovskite structure 3 NH 3 PbBr 3 and CH 3 NH 3 PB 3 As a sensitizer, it opened the prelude to the research of perovskite solar cells. In just 10 years, the efficiency of organic-inorganic hybrid perovskite cells has increased rapidly, from the original 3.8% to more than 24%. [0003] Due ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0216H01L31/0264H01L31/032
CPCH01L31/02167H01L31/02168H01L31/0264H01L31/032Y02E10/50
Inventor 刘治科赵欢韩玉段晨阳杨少敏刘生忠
Owner SHAANXI NORMAL UNIV
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