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Perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, to achieve the effects of slowing down hysteresis, improving efficiency and improving crystal grains

Active Publication Date: 2019-04-26
KUNSHAN GCL OPTOELECTRONIC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to address the problem of how to improve the efficiency of perovskite devices, and provide a perovskite solar cell capable of improving the efficiency of perovskite devices and a preparation method thereof

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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preparation example Construction

[0059] See image 3 , the preparation method of the perovskite solar cell of one embodiment of the present invention comprises the following steps:

[0060] S10, forming an electron transport layer on the transparent conductive substrate.

[0061] Please also see Figure 4 , the electron transport layer 120 is formed on the transparent conductive substrate 110 . The transparent conductive substrate 110 can be prepared by physical vapor deposition, evaporation or sputtering. The electron transport layer 120 can be prepared by spin coating, vacuum sputtering or electron beam evaporation.

[0062] S20, forming a passivation diffusion layer on the electron transport layer; wherein, the material of the passivation diffusion layer is alkali metal salt.

[0063] Please also see Figure 4 , a passivation diffusion layer 130 is formed on the electron transport layer 120 .

[0064] Preferably, the operation of forming a passivation diffusion layer on the electron transport layer i...

Embodiment 1

[0092] 1. Spin-coat 0.1M tin oxide quantum dot solution on a transparent conductive substrate, the spin-coating conditions are: 3000rpm, 1000m / s 2 , 30s, and then annealed at 100° C. for 10 minutes, then raised to 200° C. and annealed for 30 minutes to obtain a tin oxide electron transport layer.

[0093] 2. Spin-coat 30mg / ml KCL aqueous solution on the tin oxide electron transport layer, the spin-coating conditions are: 5000rpm, 2500m / s 2 , 30s, and then annealed at 120° C. for 15 minutes to obtain an alkali metal salt passivation diffusion layer.

[0094] 3. Spin-coat the 1.5M perovskite solution on the passivation diffusion layer, the spin-coating conditions are: 3000rpm, 1500m / s 2 , 7s, get a relatively uniform perovskite liquid film (wet film) after spin coating, then immediately put it into the air pumping device, pump air for about 30s, remove most of the solvent, and get a relatively dry and completely crystallized perovskite thin film, and then make the perovskite t...

Embodiment 2

[0098] The difference between Example 2 and Example 1 is that the annealing method of the perovskite film in step 3 is not directly contacted with the heating plate for heating, but a conventional heating method, that is, the perovskite film faces upward and the transparent conductive substrate faces downward Contact heating plate for heating.

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Abstract

The invention relates to a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a transparent conductive substrate, an electron transport layer, a passivation diffusion layer, a perovskite photosensitive layer, a hole transport layer and a metal electrode which are sequentially laminated, or the perovskite solar cell comprises a transparent conductive substrate, a hole transport layer and a passivation diffusion layer, a perovskite photosensitive layer, an electron transport layer and a metal electrode which are sequentially laminated; wherein the material of the passivation diffusion layer is alkali metal salt. According to the perovskite solar cell, the alkali metal salt is used as the passivation diffusion layer, and the passivation diffusion layeris positioned at one side of the perovskite photosensitive layer; on one hand, the alkali metal salt can diffuse into the perovskite photosensitive layer, the crystalline grains are larger, internaldefects are reduced, so that the stability of the device is maintained, on the other hand, the passivation diffusion layer can passivate the interface of the grain boundary, reduce the load of carriers and maintain the stability of the device. The method entirety can improve the efficiency of the perovskite device.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a perovskite solar cell and a preparation method thereof. Background technique [0002] Perovskites are formed from organic halide and metal halide salts to form ABX 3 Crystal structure, A is generally methylamino (CH 3 NH 3 ), B is a divalent metal ion (such as Pb 2+ or Sn 2+ ), X is chlorine, bromine, iodine and other halogen atoms, the most common perovskite material is lead iodide methylamine (CH 3 NH 3 PB 3 ), its band gap is about 1.5eV, and its extinction coefficient is high. A thin film with a thickness of several hundred nanometers can fully absorb sunlight below 800nm. Perovskite solar cells include many kinds of structures: mesoscopic structure, mesoscopic superstructure, planar n-i-p type and planar p-i-n type structure. [0003] Perovskite cells have become a research hotspot due to their excellent photoelectric properties. Perovskite cells generally inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K30/10H10K2102/00Y02E10/549
Inventor 朱桂安扬田清勇范斌
Owner KUNSHAN GCL OPTOELECTRONIC MATERIAL CO LTD
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