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Method for preparing PEDOT:PSS/Si heterojunction solar cell

A solar cell and heterojunction technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problem of low open circuit voltage and achieve the effect of increasing open circuit voltage and high open circuit voltage

Inactive Publication Date: 2017-07-21
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the invention is to overcome the shortcoming of low open circuit voltage of the existing PEDOT:PSS / Si heterojunction solar cell preparation process, and propose a new method for preparing high open circuit voltage PEDOT:PSS / Si heterojunction solar cell

Method used

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  • Method for preparing PEDOT:PSS/Si heterojunction solar cell

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preparation example Construction

[0025] The steps of the preparation method of the present invention are as follows:

[0026] The first step, in German Heraeus company product, model is the poly-3,4-ethylenedioxythiophene of PH1000: polystyrene sulfonate (PEDOT:PSS) solution is mixed with triton (Triton X-100) surface Activator, the mass fraction of Triton X-100 surfactant doped is 0.75%-2%, and the purity is 98%;

[0027] In the second step, apply the PEDOT:PSS solution prepared in the first step on the surface of the silicon wafer, put it into a vacuum vessel and use a mechanical pump to pump air, so that the air pressure in the vacuum chamber reaches 1-100Pa, and maintain the air pressure for 3 minutes to remove Bubbles in PEDOT:PSS solution;

[0028] The third step is to take out the silicon wafer coated with the PEDOT:PSS solution, and spin coat the PEDOT:PSS solution with a coater to form a film, the spin coating time is 60s, and the rotation speed is 6000rpm. After the film is formed, place the silic...

Embodiment 1

[0035] The first step, in German Heraeus company product, model is the poly-3,4-ethylenedioxythiophene of PH1000: polystyrene sulfonate (PEDOT:PSS) solution is mixed with triton (Triton X-100) surface Active agent, the massfraction of the triton (Triton X-100) surfactant of doping is 0.75%, and purity is 98%;

[0036] In the second step, the PEDOT:PSS solution prepared in the first step is coated on the surface of the silicon wafer, put into a vacuum vessel and evacuate with a mechanical pump, so that the air pressure in the vacuum chamber reaches 100Pa, and keep the air pressure for 3min to remove PEDOT: Air bubbles in the PSS solution;

[0037]The third step is to take out the silicon wafer coated with the PEDOT:PSS solution, and spin coat the PEDOT:PSS solution with a coater to form a film, the spin coating time is 60s, and the rotation speed is 6000rpm. After the film is formed, place the silicon wafer on a hot plate for annealing treatment, the annealing time is 30min, a...

Embodiment 2

[0042] The first step, in German Heraeus company product, model is the poly-3,4-ethylenedioxythiophene of PH1000: polystyrene sulfonate (PEDOT:PSS) solution is mixed with triton (Triton X-100) surface Active agent, the massfraction of the Triton X-100 surfactant of doping is 2%, and purity is 98%;

[0043] In the second step, the PEDOT:PSS solution prepared in the first step is coated on the surface of the silicon wafer, put into a vacuum vessel and evacuate with a mechanical pump, so that the air pressure in the vacuum chamber reaches 100Pa, and keep the air pressure for 3min to remove PEDOT: Air bubbles in the PSS solution;

[0044] The third step is to take out the silicon wafer coated with the PEDOT:PSS solution, and spin coat the PEDOT:PSS solution with a coater to form a film, the spin coating time is 60s, and the rotation speed is 6000rpm. After the film is formed, place the silicon wafer on a hot plate for annealing treatment, the annealing time is 30min, and the anne...

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Abstract

The invention provides a method for preparing a PEDOT:PSS / Si heterojunction solar cell. The method comprises steps of doping a Triton X-100 surface active agent into a PEDOT:PSS solution with, wherein the mass fraction of the doped Triton X-100 surface active agent is 0.75%-2%, and the purity is 98%; coating the obtained PEDOT:PSS solution on the surface of a silicone sheet, putting the mixture in a vacuum vessel, exhausting air to allow the air pressure in a vacuum chamber to reach 1-100 Pa, keeping the air pressure for 3 min and the removing bubbles in the PEDOT:PSS solution; taking the silicon sheet coated with the PEDOT:PSS solution and using a glue averaging machine to carry out spin-coating on the PEDOT:PSS solution to form a film, wherein the spin-coating time is 60 s and the rotation speed is 6000 rpm; after the film is forming, placing the silicon sheet on a hot plate to carry out annealing processing, wherein the annealing time is 3-30 min and the annealing temperature is 80-200 DEG C; spin-coating a cesium carbonate solution on the back face of the silicone sheet, and after a film is formed, placing the silicone sheet on the hot plate to carry out annealing processing again, wherein the annealing time is 15 min and the annealing temperature is 150 DEG C; and after the annealing, using a thermal evaporation device to evaporate metal Ag grid lines on the PEDOT:PSS film and evaporating a full Al back electrode on the cesium carbonate film, wherein the humidity of the enclosed preparation environment is controlled to be 15-40% in a preparation process.

Description

technical field [0001] The invention relates to a preparation method of a PEDOT:PSS / Si heterojunction solar cell. Background technique [0002] Poly(3,4-ethylenedioxythiophene): polystyrene sulfonate / silicon (PEDOT:PSS / Si) heterojunction solar cell is a new type of solar cell. It has the advantages of simple preparation process, low temperature, low energy consumption, and low process cost. Therefore, the research on PEDOT:PSS / Si heterojunction solar cells has received extensive attention and rapid development, and in just a few years, the conversion efficiency has also increased. has been greatly improved. Despite the improved efficiency, the low open-circuit voltage of the cell is one of the main problems of PEDOT:PSS / Si heterojunction solar cells. [0003] Currently, the PEDOT:PSS solution is mainly doped with a low mass fraction of surfactant (0.1%-0.5%), and the PEDOT:PSS solution is spin-coated to form a film on the surface of the silicon wafer. After spin-coating t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/12H10K30/451Y02E10/549
Inventor 孙佳琪王文静周春兰
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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