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TiO2/CdS perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc., can solve problems such as limiting the commercialization of perovskite solar cells and reducing the stability of perovskite solar energy, so as to improve efficiency and stability, low cost and simple preparation process

Inactive Publication Date: 2019-05-17
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

First, because TiO 2 It is an n-type wide bandgap semiconductor material, which has a strong ability to absorb ultraviolet rays; secondly, TiO 2 It has the characteristics of good heat resistance, chemical corrosion resistance, non-toxicity, insoluble, high refractive index and stable physical and chemical properties, and has high application value in the fields of solar cells and photocatalysis; third, it can TiO with different morphologies prepared by various methods 2 , such as titanium dioxide nanorod arrays, increase the contact area with the perovskite material, charge extraction and transport, thereby improving the photoelectric conversion efficiency of the device, but TiO 2 Oxygen vacancy defects on the surface degrade the stability of perovskite solar energy, limiting the commercialization of perovskite solar cells

Method used

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  • TiO2/CdS perovskite solar cell and preparation method thereof
  • TiO2/CdS perovskite solar cell and preparation method thereof
  • TiO2/CdS perovskite solar cell and preparation method thereof

Examples

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preparation example Construction

[0038] A kind of TiO 2 The preparation method of / CdS perovskite solar cell comprises the following steps:

[0039] (1) Preparation of the electron transport layer: first, the titanium dioxide nanorod array was prepared by hydrothermal method, and then cadmium sulfide was deposited on the titanium dioxide nanorod array to form a nanowire array with a cadmium sulfide / titanium dioxide core-shell structure, and the electron transport layer was obtained;

[0040] Specifically, an appropriate amount of tetra-n-butyl titanate is evenly added dropwise to hydrochloric acid, stirred for a period of time, poured into a reaction kettle for heating, and after cooling to room temperature, a titanium dioxide nanorod array grows on the conductive glass FTO, at 450-500 ℃ annealing for 30-50min, then dip the conductive glass FTO substrate with titanium dioxide nanorod arrays in the cadmium sulfide precursor solution for 0-30min, then wash with deionized water and ethanol and dry to obtain elect...

Embodiment 1

[0047] Such as figure 1 As shown, a TiO 2 / CdS perovskite solar cells, the structure of perovskite solar cells from bottom to top is: conductive glass FTO substrate, electron transport layer, light absorption layer, hole transport layer and silver electrode, the electron transport layer is cadmium sulfide / titanium dioxide A nanowire array with a core-shell structure, the light-absorbing layer is a perovskite material, and the hole-transporting layer is Spiro-OMeTAD.

[0048] A kind of TiO 2 The preparation method of / CdS perovskite solar cell comprises the following steps:

[0049] (1) Preparation of electron transport layer: 380 μL tetra-n-butyl titanate was evenly added dropwise to 30 mL HCl (5mol L -1 ) in hydrochloric acid for 5 minutes, then poured into a reaction kettle and heated at 150°C for 3 hours. After cooling to room temperature, a titanium dioxide nanorod array with a length of 600 nm was grown on the conductive glass FTO, and annealed at 500°C for 30 minutes w...

Embodiment 2

[0057] A kind of TiO 2 The preparation method of / CdS perovskite solar cell comprises the following steps:

[0058] (1) Preparation of electron transport layer: 380 μL tetra-n-butyl titanate was evenly added dropwise to 30 mL HCl (5mol L -1 ) in hydrochloric acid for 5 minutes, then poured into a reaction kettle and heated at 150°C for 3 hours, and after cooling to room temperature, titanium dioxide nanorod arrays with a length of 600 nm were grown on the conductive glass FTO, annealed at 500°C for 30 minutes; 20 mM 2( CdCl 2 )•5(H 2 O), 66 mM NH 4 Cl, 240 mM ammonia water and 140 mM thiourea were uniformly mixed in deionized water, stirred for 10 min, and stirred for 10 min to obtain a cadmium sulfide precursor solution, and then the conductive glass FTO substrate with titanium dioxide nanorod arrays was placed obliquely downward Soak in the cadmium sulfide precursor solution for 10 minutes, then wash with deionized water and ethanol, and then dry to obtain an electron tra...

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Abstract

The invention discloses a TiO2 / CdS perovskite solar cell and a preparation method thereof. The structure of the perovskite solar cell sequentially comprises a conductive glass FTO substrate, an electron transmission layer, a light absorption layer, a hole transmission layer and a silver electrode from bottom to top, wherein the electron transmission layer is a cadmium sulfide / titanium dioxide shell-core structure nanowire array, the light absorption layer is a perovskite material, and the hole transmission layer is Spiro-OMeTAD. According to the TiO2 / CdS perovskite solar cell and the preparation method thereof, provided by the invention, a titanium dioxide nanorod array is prepared by a hydrothermal method, cadmium sulfide is deposited on the titanium dioxide nanorod array by a normal-temperature chemical water bath deposition method to form a uniform cadmium sulfide / titanium dioxide shell-core structure electron transmission layer, and the light absorption layer, the hole transmissionlayer and the silver electrode are sequentially fabricated. The fabrication process is simple, the cost is low, the equipment requirement is low, and the efficiency and the stability of the cell canbe improved when the material is applied to a perovskite solar cell.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a TiO 2 / CdS perovskite solar cell and preparation method thereof. Background technique [0002] The new organic-inorganic hybrid perovskite materials have attracted the attention of many researchers because of their excellent light absorption properties, long carrier diffusion length and high carrier mobility. The material is applied in solar cells, and the photoelectric conversion efficiency has reached 23.3%, which is twice the conversion efficiency of solar cells currently on the market. Compared with traditional silicon-based solar cells, it has the advantages of simpler preparation process, lower price of raw materials, and wider sources of materials. Therefore, perovskite solar cells have greater application potential than silicon-based solar cells in terms of development prospects. [0003] Based on TiO 2 Perovskite solar cells with nanomaterials as the electron t...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48B82Y30/00
CPCY02E10/549
Inventor 李兴鳌刘维楚亮刘南京
Owner NANJING UNIV OF POSTS & TELECOMM
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