Perovskite solar cell based on down-conversion layer and preparation method of perovskite solar cell

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of decreased efficiency of perovskite solar cells, affecting electron transport performance, energy level mismatch, etc., so as to improve the photoelectric conversion ability, avoid performance decline, improve The effect of absorption properties

Pending Publication Date: 2020-11-24
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method uses TiO 2 As an electron transport layer, the performance of the material is easily degraded when it is irradiated by ultraviolet light, which affects the electron transport performance
At the same time, this method introduces the down-conversion layer and the perovskite interface layer, which will cause potential interface layer defects or energy level mismatch, resulting in a decrease in the efficiency and poor stability of the perovskite solar cell.

Method used

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  • Perovskite solar cell based on down-conversion layer and preparation method of perovskite solar cell
  • Perovskite solar cell based on down-conversion layer and preparation method of perovskite solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Preparation of transparent conductive substrate using indium tin oxide ITO, down conversion layer using gadolinium nitrate doped with dysprosium, electron transport layer using tin oxide, perovskite light absorbing layer using MAPbI 3 , the hole transport layer is made of 2,2',7,7'-tetrakis[N,N-bis(4-methoxyphenyl)amino]-9,9'-spirobifluorene material, and the top electrode is made of silver Ag perovskite solar cells.

[0043] The first step is to pretreat the indium tin oxide ITO transparent conductive substrate.

[0044] 1.1) Use industrial cleaner Decon-90 aqueous solution, deionized water, acetone, and isopropanol solution to ultrasonically clean the ITO transparent conductive substrate with a specification of 10Ω / sq indium tin oxide step by step at 50°C. The ultrasonic cleaning time of the agent is 20min, and then use a nitrogen gun to dry the surface of the cleaned indium tin oxide ITO transparent conductive substrate;

[0045]1.2) Use ultraviolet ozon...

Embodiment 2

[0062] Example 2: Preparation of a transparent conductive substrate using indium tin oxide ITO, gadolinium vanamate doped with europium for the down conversion layer, zinc oxide for the electron transport layer, and MA for the perovskite light absorbing layer 1-y FA y PB 3-x Cl x , the hole transport layer uses cuprous thiocyanate, and the top electrode uses a perovskite solar cell with a carbon electrode.

[0063] Step 1, pretreating the indium tin oxide ITO transparent conductive substrate.

[0064] The specific implementation of this step is the same as the first step of Example 1.

[0065] Step 2, preparing a dysprosium-doped lanthanum acetate down conversion layer.

[0066] 2a) Add 30 mg of ammonium vanadate and 300 mg of sodium hydroxide into 2.5 ml of deionized water to obtain a sodium vanadate solution. Add 5 mL of oleic acid and 5 mL of ethanol to the above sodium vanadate solution;

[0067] 2b) adding a solution of 340 mg lanthanum acetate hexahydrate and 40 mg...

Embodiment 3

[0082] Example 3: Preparation of a transparent conductive substrate using fluorine-doped tin oxide FTO, the down conversion layer using gadolinium oxide doped with europium, and the electron transport layer using TiO 2 , the perovskite light absorbing layer adopts MA 1-y FA y PB 3 , the hole transport layer uses poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] material, and the top electrode uses gold Au perovskite solar cells.

[0083] Step A, pretreating the fluorine-doped tin oxide FTO transparent conductive substrate.

[0084] Firstly, use industrial cleaning agent Decon-90 aqueous solution, deionized water, acetone, and isopropanol solution to ultrasonically clean the FTO transparent conductive substrate with a specification of 15Ω / sq fluorine-doped tin oxide step by step at 50°C. The ultrasonic cleaning time of the agent is 20min, and the surface of the cleaned fluorine-doped tin oxide FTO transparent conductive substrate is dried with a nitrogen gun;

[0085] Then, t...

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Abstract

The invention discloses a perovskite solar cell based on a down-conversion layer. The perovskite solar cell mainly solves the problems that an existing perovskite solar cell is low in photoelectric conversion efficiency and poor in stability. The perovskite solar cell sequentially comprises a transparent conductive substrate (1), an electron transport layer (3), a perovskite absorption layer (4),a hole transport layer (5) and a metal electrode (6) from top to bottom; the perovskite solar cell is characterized in that the down-conversion layer (2) is arranged between the transparent conductivesubstrate (1) and the electron transport layer (3), the down-conversion layer adopts a rare earth element doped material, and the rare earth element doped material comprises dysprosium-doped gadolinium vanadate and lanthanum vanadate. The solar spectrum absorption of the perovskite solar cell is improved, the introduction of interface defects and performance degradation of perovskite and an electron transport layer caused by ultraviolet light are avoided through structural adjustment, the photoelectric conversion efficiency and stability of the perovskite solar cell are improved, and the perovskite solar cell can be used for providing electric energy for outdoor working equipment.

Description

technical field [0001] The invention belongs to the technical field of semiconductor devices, and further relates to a solar cell, which can be used to provide electric energy for outdoor working equipment. Background technique [0002] In the 21st century when energy problems are becoming more and more serious, solar energy, as a rich, clean and convenient renewable energy, has received more and more attention. Silicon solar cells are currently one of the photoelectric conversion devices commercialized on a large scale. In recent years, perovskite solar cells have gradually attracted more and more attention due to their simpler preparation process and lower manufacturing cost compared with silicon solar cells. A typical perovskite solar cell structure includes a transparent conductive substrate, an electron transport layer, a perovskite absorber layer, a hole transport layer, and a top electrode from bottom to top. The light absorption range of perovskite materials is bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K30/15H10K30/151H10K2102/00Y02E10/549
Inventor 林珍华常晶晶王庆瑞苏杰郝跃
Owner XIDIAN UNIV
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