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Solar cell, method for producing same and method for improving transport properties of perovskite layer

A technology of solar cells and transmission characteristics, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems that restrict the development of perovskite solar cell efficiency and stability, have not been studied too much, and the carrier coincides seriously , to achieve the effects of improving the light-absorbing layer transmission, reducing film defects, and improving device conversion efficiency

Active Publication Date: 2021-01-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The emergence of organic / inorganic hybrid perovskite materials can be traced back a century ago, but at the time it was believed that these materials were under-studied due to the toxicity of tin and lead in them
At present, the mainstream preparation method of the light-absorbing layer is the solution method, which has the disadvantages of too many film defects, serious carrier coincidence, and poor film stability.
These issues restrict the efficiency development and stability development of the corresponding perovskite solar cells

Method used

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  • Solar cell, method for producing same and method for improving transport properties of perovskite layer
  • Solar cell, method for producing same and method for improving transport properties of perovskite layer
  • Solar cell, method for producing same and method for improving transport properties of perovskite layer

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preparation example Construction

[0063](2) Preparation of hole transport layer 3: The dried substrate is treated with oxygen plasma for 15 minutes, and then the hole transport layer is spin-coated on the substrate, preferably poly(3,4-ethylenedioxythiophene) -Polystyrene sulfonic acid (abbreviated as PEDOT: PSS). The mass fraction of PEDOT:PSS solution is 10%. Use a homogenizer to spin-coat the solution. The rotation speed is 1500rpm, and the homogenization time is 60s. The drying treatment temperature of the hole transport layer film obtained is 150℃, and the drying time is 0.5 hours. The thickness is 30nm.

[0064](3) Preparation of the perovskite layer 4: the perovskite layer 4 is prepared on the hole transport layer 3, and the perovskite layer is prepared by the one-step spin coating anti-solvent method. Among them, lead halide is lead iodide (referred to as PbI)2), tin iodide (abbreviated as SnI2); Ligand selection methylamine iodide (referred to as CH3NH3I), formamidine iodide (abbreviated (NH2)2CHI).

[0065](4) P...

Embodiment 1

[0070]Seefigure 1 The perovskite solar cell device according to the first embodiment of the present invention has the following structure:

[0071]Glass substrate / ITO(100nm) / PEDOT:PSS(30nm) / CH3NH3PbI3(400nm) / C60(30nm) / BCP(5nm) / Ag(100nm)

[0072](1) Cleaning the glass substrate with ITO pre-engraved: Use ethanol, acetone ultrasonic and deionized water ultrasonic method to clean the transparent conductive substrate 1 (ITO glass), after cleaning, place it under an infrared lamp to dry. The ITO film on the transparent conductive substrate 1 serves as the anode layer 2 of the device, the sheet resistance of the ITO film is 10-20Ω, and the film thickness is 100-120nm;

[0073](2) Preparation of hole transport layer: The dried substrate is treated with oxygen plasma for 15 minutes, and then placed on a KW-4A homogenizer, and the configured PEDOT:PSS solution is spin-coated by static batching For film formation, the rotation speed of the homogenizer is 1500rpm, the homogenization time is controlled ...

Embodiment 2

[0080]Seefigure 1 The perovskite solar cell device according to the second embodiment of the present invention has the following structure:

[0081]Glass (plastic) substrate / ITO(100nm) / PEDOT:PSS(30nm) / (NH2)2CHSnI3(200nm) / C60(30nm) / BCP(5nm) / Ag(150nm)

[0082](1) Cleaning the glass substrate with ITO pre-engraved: Use ethanol, acetone ultrasonic and deionized water ultrasonic method to clean the transparent conductive substrate 1 (ITO glass), after cleaning, place it under an infrared lamp to dry. The ITO film on the transparent conductive substrate 1 serves as the anode layer 2 of the device, the sheet resistance of the ITO film is 10-20Ω, and the film thickness is 100-120nm;

[0083](2) Preparation of hole transport layer: The dried substrate is treated with oxygen plasma for 15 minutes, and then placed on a KW-4A homogenizer, and the configured PEDOT:PSS solution is spin-coated by static batching For film formation, the rotation speed of the homogenizer is 1500rpm, the homogenization time i...

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Abstract

The invention discloses a solar cell, a preparation method thereof and a method for improving the transmission characteristics of a perovskite layer. Adding a conjugated organic ammonium salt into a DMF / DMSO solution of a perovskite precursor, annealing and cleaning to obtain a perovskite layer film, Using organic conjugated ammonium salts to control the crystal growth of perovskite layer films and inhibit charge recombination. The invention significantly reduces defects of the crystallized perovskite light-absorbing layer film, improves carrier mobility, and improves device conversion efficiency by more than 20%, which can fully meet the needs of commercial use of devices.

Description

Technical field[0001]The invention belongs to the technical field of organic / inorganic composite solar cells, and specifically relates to a solar cell, a preparation method thereof, and a method for improving the transmission characteristics of a perovskite layer.Background technique[0002]In 2013, the perovskite solar cell was selected as one of the top ten scientific breakthroughs by the American "Science" magazine. Due to a series of advantages, the new organic / inorganic composite material of perovskite has rapidly developed in the photovoltaic field after 9 years of development. Received widespread attention within.[0003]The emergence of organic / inorganic composite perovskite materials can be traced back a century ago, but at that time it was thought that these materials had not been studied too much because of the toxicity of tin and lead. At present, the mainstream method for preparing the light-absorbing layer is the solution method, which has too many defects in the film, ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/30H10K30/15Y02E10/549
Inventor 吴朝新董化冉晨鑫焦博魏斐洁
Owner XI AN JIAOTONG UNIV