Preparation method of TiO2 cookie-like microsphere and method for preparing perovskite solar cell

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of MAI ions difficult to enter, battery performance degradation, and inability to obtain MAPbI3, etc., to achieve excellent photoelectric conversion efficiency, short-circuit current improvement, and low cost effects

Inactive Publication Date: 2018-09-07
HUBEI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The same two-step method also has its own shortcomings. When the thickness of the synthesized perovskite exceeds 200nm, it is difficult for MAI ions to enter the PbI 2 , resulting in the inability to obtain pure MAPbI 3 , which also greatly reduces the performance of the battery

Method used

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  • Preparation method of TiO2 cookie-like microsphere and method for preparing perovskite solar cell
  • Preparation method of TiO2 cookie-like microsphere and method for preparing perovskite solar cell
  • Preparation method of TiO2 cookie-like microsphere and method for preparing perovskite solar cell

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Embodiment Construction

[0041] The present invention will be better understood by the following examples.

[0042] TiO 2 Preparation of cookie-like microspheres

[0043] Include the following steps:

[0044] Step (1) The liner of the polytetrafluoroethylene reaction vessel is ultrasonically cleaned with cleaning agent, deionized water, acetone, and absolute ethanol, each time for 20 minutes, each liquid is treated once, and then dried;

[0045] Step (2) Use acetonitrile, isopropanol, and acetylacetone with a volume ratio of 3:1:1 as solvents, add them to the inner tank of the reaction vessel in sequence, slowly add n-butyl titanate into the inner tank of the reaction vessel, and mix the solvents The volume ratio of n-tetrabutyl titanate is 50ml: 2ml to make it fully stirred evenly;

[0046] Step (3) Slowly add 0.3ml of tetrabutylammonium hydroxide aqueous solution dropwise in the mixed solution gained in step (2) as control agent, stir evenly;

[0047] Step (4) Sealing the liner of the polytetraf...

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Abstract

The invention discloses a preparation method of a TiO2 cookie-like microsphere and a method for preparing a perovskite solar cell. The preparation method of the TiO2 microsphere comprises the following steps: after mixing acetonitrile, isopropanol and acetylacetone, dropwise adding tetrabutyl titanate and tetrabutyl ammonium hydroxide as a controlling agent, heating for 12 -20 hours at 160 DEG C -200 DEG G, precipitating, centrifugal washing and drying, and then high-temperature annealing to obtain TiO2 microsphere powder; mixing the obtained powder with P25 to prepare a slurry which is spin-coated on a FTO which has been coated with a compact layer and is served as a mesoporous layer of the perovskite solar cell; spin-coating MAPbI3 and Spiro-OMeTAD successively on the TiO2 film, and finally vapor-depositing a layer of Au. The TiO2 microsphere having a high specific surface area adopts a one-step hydrothermal method, the preparation process is simple and the cost is low; the preparedTiO2 film exhibits excellent conductivity and absorption effect on visible light; and the prepared TiO2 film is applied to the perovskite solar cell, thereby obtaining excellent photoelectric conversion efficiency, and providing the possibility to prepare large-area, low-cost and high-efficiency perovskite solar cells.

Description

technical field [0001] The invention belongs to the field of solar cells, specifically TiO 2 A method for preparing cookie-like microspheres and a method for preparing perovskite solar cells. Background technique [0002] The nanomaterials used as the mesoporous layer of perovskite solar cells (PSC) need to meet the following characteristics: first, good light transmission, which can transmit more incident light and reduce light loss; second, its conduction band energy level The position can match the energy level of the light-absorbing material to reduce the energy loss of excitons; three, excellent electron transport performance, effectively inhibiting the recombination of electrons and holes; four, large porosity and specific surface area, which is conducive to enhancing the incident light Reflection inside the cell improves the light-harvesting capability of the device. At this stage, TiO is commonly used as the material of PSC mesoporous layer. 2 , ZnO, NiOx and ZrO2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/00
CPCH10K71/20H10K30/10H10K30/80Y02E10/549
Inventor 王浩陈柯宇桃李
Owner HUBEI UNIV
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