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A perovskite solar cell device for modifying a hole transport layer and a preparation method thereof

A hole transport layer and solar cell technology, applied in the field of solar cells, can solve the problems of difficult control of the crystallization speed and morphology of the absorption layer, and limit the efficiency of perovskite solar cells, so as to improve carrier mobility and diffusion length , Improving charge transport efficiency and improving device efficiency

Inactive Publication Date: 2019-01-18
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At the same time, it is difficult to control the crystallization speed and morphology of the absorbing layer in this perovskite solar cell, which limits the efficiency of perovskite solar cells.

Method used

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  • A perovskite solar cell device for modifying a hole transport layer and a preparation method thereof
  • A perovskite solar cell device for modifying a hole transport layer and a preparation method thereof
  • A perovskite solar cell device for modifying a hole transport layer and a preparation method thereof

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Effect test

Embodiment 1

[0031] (1) Preparation of perovskite precursor solution

[0032] Weigh 222.6mg of MAI and 645.4mg of PbI respectively 2 Mix and pour into a sealed bottle, pour 700 μL of GBL and 300 μL of DMSO into the above mixture as a solvent, the molar concentration of the solution is 1.4mol / L, and let it stand in a glove box at room temperature for about 20 minutes, until the solute is completely dissolved to obtain calcium Titanium ore precursor.

[0033] (2) Preparation of perovskite solar devices

[0034] The ITO glass sheet was ultrasonically treated with acetone, deionized water, and ethanol, and then treated with plasma. PEDOT:PSS was spin-coated on the ITO glass at a rate of 4000rpm / 30s, and annealed at 130°C for 15min. Dissolve ethyl acetate in ethanol according to the volume ratio of 10%, spin-coat the modification solution on the prepared hole transport layer at a speed of 4000rpm / 30s, and dry naturally; take 35 μL of the precursor solution in step (1) and add dropwise On the...

Embodiment 2

[0039] (1) Preparation of perovskite precursor solution

[0040] Weigh 222.6mg of MAI and 645.4mg of PbI respectively 2 Mix and pour into a sealed bottle, pour 700 μL of GBL and 300 μL of DMSO into the above mixture as a solvent, the molar concentration of the solution is 1.4mol / L, and let it stand in a glove box at room temperature for about 20 minutes, until the solute is completely dissolved to obtain calcium Titanium ore precursor.

[0041] (2) Preparation of perovskite solar devices

[0042] The ITO glass sheet was ultrasonically treated with acetone, deionized water, and ethanol, and then treated with plasma. PEDOT:PSS was spin-coated on the ITO glass at a rate of 4000rpm / 30s, and annealed at 130°C for 15min. Prepare modification solutions with volume ratios of ethyl acetate and ethanol of 10%, 15%, 20%, and 25%, respectively, spin-coat it on the prepared hole transport layer at a speed of 4000rpm / 30s, and dry naturally; 35 μL of the precursor solution in step (1) was...

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Abstract

The invention discloses a perovskite solar cell device for modifying a hole transport layer and a preparation method thereof. the solar cell device comprises a transparent substrate, an anode, a holetransport layer, an absorbing layer, an electron transport layer, amodified layer and a cathode which are sequentially superposed; the invention uses ethanol solution of ethyl acetate to modify the surface of the hole transport layer, so that its surface has some effective groups, which can effectively promote the crystallization of perovskite thin film, It is advantageous to form more flat and compact perovskite thin film, to improve carrier mobility and diffusion length, to improve charge transfer efficiency, to effectively increase short circuit current, to improve device efficiency, so asto improve the performance of solar cells and other light-emitting devices, and has been widely used in the preparation of perovskite battery devices.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a perovskite solar cell device for modifying a hole transport layer and a preparation method thereof. Background technique [0002] In 2009, people used CH for the first time 3 NH 3 PB 3 , CH 3 NH 3 PbBr 3 A photovoltaic efficiency of about 4% was achieved as a sensitizer for dye-sensitized solar cells. Since then, people have used this material to prepare nanocrystals with a particle size of 2-3nm and introduced them into dye-sensitized solar cells, achieving a photoelectric conversion efficiency of more than 6%. The perovskite material is deposited on TiO in the form of quantum dots. 2 On the surface, however, this battery uses a liquid electrolyte, and the perovskite material will gradually dissolve in the electrolyte, so the life of the battery is very short and the efficiency cannot be greatly improved. [0003] 2012, with CH 3 NH 3 PB 3 with CH 3 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48H01L51/00H10K99/00
CPCH10K71/12H10K30/00Y02E10/549
Inventor 曾文进崔岱麒闵永刚李志唐亚楠邓云恺
Owner NANJING UNIV OF POSTS & TELECOMM
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