Perovskite solar cell and method for manufacturing same

A solar cell and perovskite technology, applied in the field of solar cells, can solve problems such as poor stability

Inactive Publication Date: 2015-07-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the restriction of the steric tolerance factor in the three-dimensional perovskite hybrid, the A site can only be a cation with a small ionic radius such as (CH 3 NH 3 ) + or (NH=CHNH 3 ) + , and these small-radius organic cations lead to AMX 3 Main reasons for poor stability

Method used

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  • Perovskite solar cell and method for manufacturing same
  • Perovskite solar cell and method for manufacturing same
  • Perovskite solar cell and method for manufacturing same

Examples

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Embodiment 1

[0044] The steps of the method for preparing the perovskite solar cell in this embodiment are as follows:

[0045] 1.(C 6 H 5 CH 2 CH 2 NH 3 ) 2 PbI 4 The synthesis of powder crystals is specifically divided into the following two steps:

[0046] Step (a) Synthesis C 6 H 5 CH 2 CH 2 NH 3 I powder crystals: Add 5.44g of hydroiodic acid aqueous solution (47wt%) slowly to 2.47g of phenethylamine (purity ≥98%) under the condition of ice water bath and keep stirring for 1h, in which the hydroiodic acid and phenylethyl The molar ratio of amine is 1:1, and then the mixed solution is stirred at 60°C for 1h, part of the solvent is evaporated, cooled to room temperature and then suction filtered to obtain white crystals. The white crystals are vacuum dried at 60°C for 10h to obtain C 6 H 5 CH 2 CH 2 NH 3 I powder crystal.

[0047] Step (b) Synthesis (C 6 H 5 CH 2 CH 2 NH 3 ) 2 PbI 4 Powder crystal: accurately weigh 0.470g PbI 2 (Purity≥98%) dissolved in 10mL hydroiodic acid aqueous solution (4...

Embodiment 2

[0059] The steps of the method for preparing the perovskite solar cell in this embodiment are as follows:

[0060] 1.C 6 H 5 CH 2 CH 2 NH 3 ) 2 (CH 3 NH 3 )Pb 2 I 7 The synthesis of powder crystals is specifically divided into the following three steps:

[0061] Step (a) Synthesis of CH 3 NH 3 I powder crystals: slowly add 10.35g of hydroiodic acid aqueous solution (47wt%) to 3.58g of methylamine ethanol solution (30-33wt%) in an ice-water bath, and stir continuously for 1h. The molar ratio of methylamine is 1:1, then the mixed solution is stirred at 60°C for 1h to volatilize part of the solvent, cooled to room temperature and suction filtered to obtain white crystals. The white crystals are vacuum dried at 60°C for 10h to obtain CH 3 NH 3 I powder crystal.

[0062] Step (b) Synthesis C 6 H 5 CH 2 CH 2 NH 3 I powder crystals: slowly add 5.44g of hydroiodic acid (47wt%) to 2.47g of phenethylamine (≥98%) in an ice-water bath and keep stirring to obtain a mixed solution for 1h, hydroiod...

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Abstract

The invention relates to a perovskite solar cell and a method for manufacturing the same. The perovskite solar cell comprises an FTO (fluorine-doped tin oxide) transparent conducting glass substrate, an electron transport layer, a light absorption layer, a hole transport layer and a metal electrode. The light absorption layer is made of (C<6>H<5>CH<2>CH<2>NH<3>)<2>(CH<3>NH<3>)<n-1>Pb<n>I<3*n+1> (the n is equal to 1 or 2) materials which are of two-dimensional layered structures. The perovskite solar cell and the method have the advantages that the layered perovskite light absorption layer is manufactured by the aid of a spin coating process, the method is simple and is excellent in film-forming property, the materials of the light absorption layer can be changed along with the layer number n, gaps of the materials can be adjusted, and the materials are excellent in chemical stability and still can keep the excellent layered structures without chemical decomposition after being exposed at high air humidity (50-80%) for 30 days, solar cell prototype devices with excellent and stable performance can be obtained, and the perovskite solar cell and the method are favorable for promoting perovskite solar cell commercialization progress.

Description

Technical field [0001] The invention belongs to the technical field of solar cells, relates to a perovskite solar cell and a preparation method thereof, in particular to a perovskite-like material with a layered structure (C 6 H 5 CH 2 CH 2 NH 3 ) 2 (CH 3 NH 3 ) n-1 Pb n I 3n+1 (n=1, 2) a perovskite solar cell with a light-absorbing layer and a preparation method thereof. Background technique [0002] About 85% of the solar cell market is occupied by crystalline silicon solar cells, but the high price of crystalline silicon restricts the application and development of the photovoltaic industry. Perovskite solar cell is a new type of solar cell, which mainly uses photovoltaic materials with perovskite structure to realize photoelectric conversion. It has the advantages of wide sources of raw materials, simple structure, low price, and can be prepared into flexible batteries. However, the industrialization bottleneck of this type of battery is the low photoelectric conversion effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/00H10K85/30H10K30/151H10K30/00Y02E10/549Y02P70/50
Inventor 甘小燕刘克永杜湘军刘韩星郭丽玲郝华曹明贺
Owner WUHAN UNIV OF TECH
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