High-efficiency planar heterojunction perovskite thin-film solar cell and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems such as the coverage rate and uniformity of perovskite film and the interface contact between perovskite and hole transport layer that are not completely solved.

Active Publication Date: 2018-03-23
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solvent engineering techniques such as the "chlorobenzene treatment method" still have not fully resolved the issues of perovskite film coverage and uniformity and interfacial contact between perovskite and hole transport layers.

Method used

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  • High-efficiency planar heterojunction perovskite thin-film solar cell and preparation method thereof
  • High-efficiency planar heterojunction perovskite thin-film solar cell and preparation method thereof
  • High-efficiency planar heterojunction perovskite thin-film solar cell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 1) Processing of ITO glass: first, the size is 15mm×15mm, the impedance is 10Ωsq -1 Clean the ITO glass with decontamination powder, then ultrasonically treat it in deionized water, acetone and absolute ethanol for 10-15min respectively, and finally treat the glass with UV for 15-20min;

[0043] 2) Spin coating of the electron transport layer: firstly, the prepared TiO 2 The solution was spin-coated on the ITO glass treated in step 1) at 4000 rpm for 60 seconds, then annealed in air at 150°C for 10-15min, and finally cooled slowly to room temperature to obtain dense TiO 2 layer;

[0044] 3) "CB / HTM treatment": Put the treated ITO glass into the glove box, take γ-butyrolactone and DMSO solvent with a volume ratio of 7:3 and stir thoroughly, and then add CH 3 NH 3 I and PbI 2 Add it to the above mixed solvent, and stir it well to prepare a perovskite precursor solution; add the hole transport material spiro-OMeTAD to the chlorobenzene solvent to prepare a CB / spiro-OMe...

Embodiment 2

[0049] 1) Processing of ITO glass: first, the size is 15mm×15mm, the impedance is 10Ωsq -1 Clean the ITO glass with decontamination powder, then ultrasonically treat it in deionized water, acetone and absolute ethanol for 10-15min respectively, and finally treat the glass with UV for 15-20min;

[0050] 2) Spin coating of the electron transport layer: put the treated ITO glass into the glove box, firstly put the prepared TiO 2 The solution was spin-coated on the ITO glass treated in step 1) at 4000 rpm for 60 seconds, then annealed at 150°C in the atmosphere for 10-15min, and finally cooled slowly to room temperature to obtain dense TiO 2 layer;

[0051] 3) "CB / HTM treatment": Put the treated ITO glass into the glove box, take γ-butyrolactone and DMSO solvent with a volume ratio of 7:3 and stir thoroughly, and then add CH 3 NH 3 I and PbI 2 Add it to the above mixed solvent and stir it well to prepare a perovskite precursor solution; add the hole transport material spiro-OM...

Embodiment 3

[0056] 1) Processing of ITO glass: First, the size is 15mm×15mm, the impedance is 15Ωsq -1 Clean the ITO glass with decontamination powder, then ultrasonically treat it in deionized water, acetone and absolute ethanol for 10-15min respectively, and finally treat the glass with UV for 15-20min;

[0057] 2) Spin coating of the electron transport layer: firstly, the prepared TiO 2 The solution was spin-coated on the ITO glass treated in step 1) at 4000 rpm for 60 seconds, then annealed at 150°C in the atmosphere for 10-15min, and finally cooled slowly to room temperature to obtain dense TiO 2 layer;

[0058] 3) "CB / HTM treatment": Put the treated ITO glass into the glove box, take γ-butyrolactone and DMSO solvent with a volume ratio of 7:3 and stir thoroughly, and then add CH 3 NH 3 I and PbI 2 Add it to the above mixed solvent and stir it well to prepare the perovskite precursor solution; add the hole transport material spiro-OMeTAD to the chlorobenzene solvent to prepare a ...

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Abstract

The invention relates to a high-efficiency planar heterojunction perovskite thin-film solar cell and a preparation method thereof. A method called a "CB/HTM processing method" (that is the "CB/ETM processing method" in the anti-structural PSCs) is used for the treatment of a perovskite thin film. In the method, a chlorobenzene solution containing a hole transport material (an electron transport material in the anti-structural PSCs) is added during the spin-coating of a perovskite precursor solution, afterwards, the heat annealing is performed, and then, the spin coating of a hole transport layer (the electron transport layer in the anti-structured PSCs) continues so that a mixed layer of a perovskite layer and the hole (or electron) transport material that penetrates through each other isformed between the perovskite layer and the hole (or electron) transport layer to allow the perovskite layer to be in closer contact with the hole (or electron) transport layer. Thus, the electrical properties of the PSCs are improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and relates to a high-efficiency planar heterojunction perovskite thin-film solar cell and a preparation method thereof, in particular to a perovskite thin-film solar cell (PSCs) and its Preparation. Background technique [0002] Solar cells are an important development direction of new energy in the future. However, solar cells still have the problems of low conversion efficiency and high production cost, which is difficult to meet the actual production. Perovskite thin film solar cells have attracted extensive research by many researchers due to their simple structure, low cost and easy production. [0003] Planar heterojunction perovskite solar cells are the focus of current research, and the quality of the perovskite film and the combination with the hole transport layer are important factors affecting the performance of solar cells. Studies have shown that when the perovskite film is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/12H10K71/15H10K30/151Y02E10/549Y02P70/50
Inventor 李炫华伍秦江仝腾腾魏秉庆
Owner NORTHWESTERN POLYTECHNICAL UNIV
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