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Perovskite solar cell and preparation method thereof

A technology of solar cells and perovskites, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of long production process time and high energy consumption

Pending Publication Date: 2022-02-08
COLLEGE OF SCI & TECH NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the traditional electron transport layer directly leads to the long production process and high energy consumption of the existing perovskite solar cells.

Method used

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  • Perovskite solar cell and preparation method thereof
  • Perovskite solar cell and preparation method thereof
  • Perovskite solar cell and preparation method thereof

Examples

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Embodiment 1

[0032] This embodiment provides a method for preparing a perovskite solar cell, comprising the following steps:

[0033] Step S1: Use deionized water, alcohol, and isopropanol to clean the conductive glass layer (ITO) with a size of 1.5cm*1.5cm, then dry the conductive glass layer, and spin-coat 5-AVA on the surface of the conductive glass layer (5-aminovaleric acid) aqueous solution, spin coating speed is 4000rpm, spin coating time is 30s, and then annealed at 100°C for 10min, on the one hand, it helps to form chemical bonds between 5-AVA and the conductive glass layer, on the other hand Avoid the decomposition of 5-AVA, and finally form a 5-AVA replacement layer on the surface of the conductive glass layer;

[0034] The concentration of 5-AVA in the aqueous solution of 5-AVA in the present embodiment is 10mg / mL;

[0035] Step S2: 1.26mol FAI, 0.14mol CsCl and 1.47mol PbI 2 Dissolve in DMF and DMSO and stir, the volume ratio of DMF and DMSO is 4:1, the stirring temperature ...

Embodiment 2

[0040] The difference between this example and Example 1 is that in step S1, the concentration of 5-AVA in the aqueous solution of 5-AVA is 15 mg / mL.

Embodiment 3

[0042] The difference between this example and Example 1 is that in step S1, the concentration of 5-AVA in the aqueous solution of 5-AVA is 20 mg / mL.

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Abstract

The invention discloses a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a conductive glass layer, a 5-AVA replacement layer, a perovskite layer, a hole transport layer and an electrode layer which are sequentially arranged in a layered manner. A carboxyl group of 5-AVA can form a chemical bond with a hydroxyl group on the surface of ITO, due to a straight-chain structure of 5-AVA, an amino group of 5-AVA can effectively face a perovskite layer, and a 5-AVA replacement layer is not used as an electron transport layer, but is used as a dipole layer to modify the surface of the conductive glass layer, so the surface work function of the conductive glass layer is reduced, energy levels of the conductive glass layer and the perovskite layer are more matched, carrier recombination between the conductive glass layer and the perovskite layer is greatly inhibited, charge transfer is promoted, and an effect of improving a crystallization process of the perovskite layer is also achieved, so that the grain size of the perovskite layer is improved.

Description

【Technical field】 [0001] The invention relates to a perovskite solar cell and a preparation method thereof, belonging to the field of perovskite solar cells. 【Background technique】 [0002] Traditional perovskite solar cells need to prepare an electron transport layer as an n-type semiconductor to ensure cell efficiency. Generally, the electron transport layer is made of oxides such as titanium dioxide or tin dioxide. No matter what kind of material is used, it has to be annealed at high temperature for a long time to ensure that it forms a suitable crystal form. The general temperature of this process is above 150°C. , especially titanium dioxide, the annealing temperature is even at 500°C. Another example is that tin dioxide not only needs to be annealed at 150°C, but also requires ultraviolet light and ozone for surface treatment. Therefore, the traditional electron transport layer directly leads to the long production process and high energy consumption of the existing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/15H10K71/12H10K30/15Y02E10/549
Inventor 诸跃进王家豪黄利克付世强钟才明
Owner COLLEGE OF SCI & TECH NINGBO UNIV
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