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Solar cell and preparation method thereof and method for improving transmission characteristic of perovskite layer

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

Active Publication Date: 2019-03-01
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 and preparation method thereof and method for improving transmission characteristic of perovskite layer
  • Solar cell and preparation method thereof and method for improving transmission characteristic of perovskite layer
  • Solar cell and preparation method thereof and method for improving transmission characteristic of perovskite layer

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preparation example Construction

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

[0064] (3) Preparation of the perovskite layer 4: the perovskite layer 4 was prepared on the hole transport layer 3, and the perovskite layer was prepared by a one-step spin-coating anti-solvent method. Among them, the lead halide selects lead iodide (referred to as PbI 2 ), tin iodide (referred to as SnI 2 ); the ligand selects methylamine iodide (abbreviated ...

Embodiment 1

[0070] see figure 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) / CH 3 NH 3 PB 3 (400nm) / C60(30nm) / BCP(5nm) / Ag(100nm)

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

[0073] (2) Preparation of the hole transport layer: Treat the dried substrate with oxygen plasma for 15 minutes, then place it on the KW-4A homogenizer, spin-coat the prepared PEDOT:PSS solution by static batching For film formation, the speed of the homogenizer is 1500rpm, the homog...

Embodiment 2

[0080] see figure 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) / (NH 2 ) 2 CHSnI 3 (200nm) / C60(30nm) / BCP(5nm) / Ag(150nm)

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

[0083] (2) Preparation of the hole transport layer: Treat the dried substrate with oxygen plasma for 15 minutes, then place it on the KW-4A homogenizer, spin-coat the prepared PEDOT:PSS solution by static batching For film formation, the speed of the homogenizer is 1500rp...

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Abstract

The invention discloses a solar cell and a preparation method thereof and a method for improving transmission characteristic of a perovskite layer. Conjugated organic ammonium salt is added into a DMF / DMSO solution of a perovskite precursor, and annealing and cleaning are carried out to obtain a perovskite layer thin film; and the crystal growth of the perovskite thin film is regulated and controlled by utilizing the organic conjugated ammonium salt, and the charge recombination is inhibited. According to the method, the defect of the crystallized perovskite light absorption layer thin film isobviously reduced, the carrier mobility is improved, the device conversion efficiency is improved by 20% or above, and the requirements of commercial use of devices can be fully met.

Description

technical field [0001] The invention belongs to the technical field of organic / inorganic composite solar cells, and in particular 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, perovskite solar cells were selected as one of the top ten scientific breakthroughs by the American "Science" magazine. Due to a series of advantages, perovskite, a new type of organic / inorganic composite material, has rapidly developed in the field of photovoltaics after just 9 years of development. received widespread attention. [0003] The emergence of organic / inorganic hybrid perovskite materials can be traced back a century ago, but at the time it was believed that such materials had not been studied much 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 disadv...

Claims

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Application Information

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Patent Type & Authority Applications(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
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