Perovskite-type light-sensitive material in cubic system structure and preparation method therefor

A technology of perovskite material and cubic crystal system, which is applied in the field of solar cells, can solve the problems of poor stability and low optical absorption rate, and achieve the effects of improving stability, enhancing light absorption, and easily forming thin films

Active Publication Date: 2015-12-02
KUNMING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention proposes a perovskite-type photosensitive material with a cubic crystal system structure and a preparation method thereof, which solves the problems of poor stability and low optical absorption rate caused by the absorption layer of the perovskite-type photosensitive material having a tetragonal crystal system structure

Method used

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  • Perovskite-type light-sensitive material in cubic system structure and preparation method therefor
  • Perovskite-type light-sensitive material in cubic system structure and preparation method therefor
  • Perovskite-type light-sensitive material in cubic system structure and preparation method therefor

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Embodiment 1

[0041] A method for preparing a perovskite solar cell, comprising the steps of:

[0042] 1) Pretreat the substrate. Pretreatment method: clean the substrate with detergent, then ultrasonically clean it with absolute ethanol and methanol respectively for 5 minutes, and then irradiate it with ultraviolet lamp or ozone for 15 minutes. The substrate is fixed on the evaporation bracket, and then placed in the evaporation chamber. Before the substrate is placed in the alumina crucible, the substrate needs to be pre-baked and preheated in the evaporation chamber, and then Carry out thermal insulation evaporation, put two alumina crucibles carrying different evaporation sources into the evaporation chamber, and the evaporation sources are respectively CH 3 NH 3 I. PbCl 2 ;

[0043] 2) Heating two alumina crucibles, and keeping CH throughout the heating process 3 NH 3 I and PbCl 2 The molar ratio is 3:1, and the vacuum in the evaporation chamber is pumped to 5×10 -6 Below mbar, ...

Embodiment 2

[0048] A method for preparing a perovskite solar cell, comprising the steps of:

[0049] 1) Pretreat the substrate. Pretreatment method: clean the substrate with detergent, then ultrasonically clean it with absolute ethanol and methanol respectively for 5 minutes, and then irradiate it with ultraviolet lamp or ozone for 15 minutes. The substrate is fixed on the evaporation bracket, and then placed in the evaporation chamber. Before the substrate is placed in the alumina crucible, the substrate needs to be pre-baked and preheated in the evaporation chamber, and then Carry out thermal insulation evaporation, put two alumina crucibles carrying different evaporation sources into the evaporation chamber, and the evaporation sources are respectively CH 3 NH 3 I. PbCl 2 ;

[0050] 2) Heating two alumina crucibles, and keeping CH throughout the heating process 3 NH 3 I and PbCl 2 The molar ratio is 3:1, and the vacuum in the evaporation chamber is pumped to 5×10 -6 Below mbar, ...

Embodiment 3

[0055] A method for preparing a perovskite solar cell, comprising the steps of:

[0056] 1) Pretreat the substrate. Pretreatment method: clean the substrate with detergent, then ultrasonically clean it with absolute ethanol and methanol respectively for 5 minutes, and then irradiate it with ultraviolet lamp or ozone for 15 minutes. The substrate is fixed on the evaporation bracket, and then placed in the evaporation chamber. Before the substrate is placed in the alumina crucible, the substrate needs to be pre-baked and preheated in the evaporation chamber, and then Carry out thermal insulation evaporation, put two alumina crucibles carrying different evaporation sources into the evaporation chamber, and the evaporation sources are respectively CH 3 NH 3 I. PbCl 2 ;

[0057] 2) Heating two alumina crucibles, and keeping CH throughout the heating process 3 NH 3 I and PbCl 2 The molar ratio is 3:1, and the vacuum in the evaporation chamber is pumped to 5×10 -6 Below mbar, ...

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Abstract

The invention discloses a perovskite-type light-sensitive material in a cubic system structure and a preparation method therefor, and solves problems that the stability is poor and the optical absorptivity is low because an absorption layer in the perovskite-type light-sensitive material is in the cubic system structure. The perovskite-type light-sensitive material is in the cubic system structure comprises a substrate and the absorption layer disposed at the top of the substrate. The absorption layer is a CH3NH3PbI3-xClx perovskite material in a cubic system, and the thickness of the absorption layer is 530 nm. The method employs a thermal evaporation system to prepare a perovskite cell absorption layer CH3NH3PbI3-xClx on the surface of the substrate, and carries out annealing treatment under certain temperature, thereby achieving the switching of the crystal structure of the perovskite cell absorption layer from a tetragonal system structure to a cubic system structure, and improving the stability and exciton mobility ratio.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a perovskite photosensitive material with a cubic crystal system structure and a preparation method thereof. Background technique [0002] In recent years, organo-metal-halide CH 3 NH 3 PB 3 、CH 3 NH 3 PbBr 3 、CH 3 NH 3 PbCl 3 、CH 3 NH 3 PB 3-x Cl x 、CH 3 NH 3 PB 3-x Br x Perovskite materials have the advantages of long carrier transmission distance, low exciton binding energy, strong optical absorption and adjustable band gap, and have attracted widespread attention. Their photoelectric conversion efficiency has increased from 3.8% in 2009. to 20.1% in 2014. where CH 3 NH 3 PB 3-x Cl x Organo-metal-halide perovskite materials with mixed halogen atoms have become one of the best candidates for many new organic-inorganic photovoltaic materials due to the advantages of carrier diffusion distance up to 1 micron and low phase transition temperature. In order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/48
CPCH10K71/10H10K71/40H10K85/00Y02E10/549
Inventor 王海刘铸罗德映于雷鸣邹涛隅罗利吕正红
Owner KUNMING UNIV
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