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Solar cells based on organic-inorganic hybrid perovskite oriented crystal thin films

A solar cell and perovskite technology, applied in the field of solar cells, can solve problems such as the barrier of charge transfer due to insulating properties, the inability to achieve photoelectric conversion efficiency, and the reduction of short-circuit current of solar cells, so as to achieve the effect of improving the carrier transport capability.

Active Publication Date: 2019-08-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the introduction of the second amine source, the hybrid perovskite has a two-dimensional structural feature, which tends to grow along the substrate crystal, so that the second amine source is arranged parallel to the substrate, and its insulating properties become perpendicular to the substrate. The hindrance of charge transport in the direction of the substrate greatly reduces the short-circuit current of solar cells using this type of material as the active layer, and thus cannot achieve high photoelectric conversion efficiency, which limits the application of this type of material in solar cells

Method used

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  • Solar cells based on organic-inorganic hybrid perovskite oriented crystal thin films
  • Solar cells based on organic-inorganic hybrid perovskite oriented crystal thin films
  • Solar cells based on organic-inorganic hybrid perovskite oriented crystal thin films

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Embodiment 1

[0018] The glass substrate was ultrasonically washed with detergent, isopropanol, ethanol, and acetone for 5 minutes, rinsed with deionized water, and dried. Spin-coat a layer of metal aluminum with a thickness of 10nm on the glass substrate, after UV-ozone treatment, and then prepare a PEDOT:PSS hole transport layer with a thickness of about 40nm by spin coating, bake at 120°C for 15 minutes take out. Mix and dissolve methylamine iodide, n-butylamine hydriodide, lead iodide, and ammonium thiocyanate in N,N-dimethylformamide, lead iodide and N,N-dimethylformamide The proportioning ratio is 50 milligrams: 1 milliliter, ammonium iodide: n-butylamine hydroiodide: lead iodide: ammonium thiocyanate (molar ratio) is 2:2:3:0.005, stir overnight, obtain precursor body solution; using the method of solution spin coating, the precursor solution was spin-coated on the PEDOT:PSS layer to form a film, the rotation speed was 2000 rpm, the rotation time was 10 seconds, and annealed at 70°C ...

Embodiment 2

[0020] The quartz substrate was ultrasonically washed with detergent, isopropanol, ethanol, and acetone for 5 minutes, rinsed with deionized water and dried. Vacuum-deposit a layer of metallic silver with a thickness of 20nm on the quartz substrate, and after UV-ozone treatment, prepare a PEDOT:PSS hole transport layer with a thickness of about 40nm by spin coating, bake at 120°C for 15 minutes and take it out . Mix and dissolve methylamine iodide, n-butylamine hydriodide, lead iodide, and ammonium thiocyanate in N,N-dimethylformamide, lead iodide and N,N-dimethylformamide The proportioning ratio is 800 mg: 1 milliliter, ammonium iodide: n-butylamine hydroiodide: lead iodide: ammonium thiocyanate (molar ratio) is 2:2:3:1.5, stirs overnight, obtains precursor body solution; using the method of solution spin coating, the precursor solution was spin-coated on the PEDOT:PSS layer to form a film, the rotation speed was 8000 rpm, the rotation time was 60 seconds, and annealed at 15...

Embodiment 3

[0022] The quartz substrate was ultrasonically washed with detergent, isopropanol, ethanol, and acetone for 5 minutes, rinsed with deionized water and dried. A layer of metallic gold with a thickness of 25nm was vacuum evaporated on a quartz substrate. After UV-ozone treatment, a CuOx hole transport layer with a thickness of about 40nm was prepared by spin coating, and it was baked at 150°C for 15 minutes and then taken out. Mix and dissolve methylamine iodide, n-butylamine hydriodide, lead iodide, and ammonium thiocyanate in N,N-dimethylformamide, lead iodide and N,N-dimethylformamide The proportioning ratio is 500 mg: 1 milliliter, ammonium iodide: n-butylamine hydroiodide: lead iodide: ammonium thiocyanate (molar ratio) is 2:2:3:1, stirs overnight, obtains precursor The precursor solution is used for spin-coating, and the precursor solution is spin-coated on the CuOx layer to form a film. The spin speed is 5000 rpm, the spin time is 30 seconds, and annealed at 100°C for 10 ...

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Abstract

The invention discloses a solar cell based on an organic-inorganic hybrid perovskite oriented crystal film. It includes a substrate, a transparent electrode layer, a hole transport layer, an active layer, an electron transport layer, and a metal electrode layer; from bottom to top, a transparent electrode layer, a hole transport layer, an active layer, an electron transport layer, metal electrode layer. The active layer is an organic-inorganic hybrid perovskite material, which is characterized in that the second amine source is introduced into the three-dimensional organic-inorganic hybrid perovskite material to improve its moisture resistance and at the same time in the active layer. In the preparation process of the thin film material, the orientation direction of its crystal growth is controlled, and the carrier transport ability of the active layer in the direction perpendicular to the substrate is improved, so as to achieve the purpose of improving the photoelectric conversion efficiency of the solar cell while taking into account the moisture resistance of the material and the device.

Description

technical field [0001] The invention relates to a solar cell based on an organic-inorganic hybrid perovskite oriented crystal thin film. [0002] technical background [0003] Organic-inorganic hybrid perovskite materials have excellent photoelectric properties such as strong absorption, high mobility, long carrier lifetime, and adjustable band gap of inorganic semiconductor materials, as well as good large-area solution processability of organic substances. The field of photoelectric conversion has attracted much attention. At present, the efficiency of three-dimensional perovskite solar cells based on lead iodide has exceeded 22%. While the device efficiency is rapidly improving, the poor moisture resistance of the three-dimensional hybrid perovskite thin film material has become the focus of attention. From the material point of view, the method of introducing a second amine source into the three-dimensional structure hybrid perovskite material can make the material have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/12H10K30/30Y02E10/549
Inventor 吴刚张欣茜陈红征
Owner ZHEJIANG UNIV
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