Two-dimensional perovskite light absorption material and preparation method thereof

A light-absorbing material and perovskite technology, applied in organic chemistry methods, amino compound preparation, chemical instruments and methods, etc., can solve the instability of three-dimensional perovskite light-absorbing materials and two-dimensional perovskite light-absorbing material devices Low efficiency and other problems, to achieve good stability and high efficiency

Active Publication Date: 2019-08-27
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problems of instability of existing three-dimensional perovskite light-absorbing materials and low device efficiency of two-dimensional perovskite light-absorbing materials. Stable two-dimensional perovskite light-absorbing material and preparation method thereof

Method used

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  • Two-dimensional perovskite light absorption material and preparation method thereof
  • Two-dimensional perovskite light absorption material and preparation method thereof
  • Two-dimensional perovskite light absorption material and preparation method thereof

Examples

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Embodiment 1

[0022] A preparation method of a two-dimensional perovskite light-absorbing material, the steps are as follows:

[0023] (1), 1,4-butanediamine (BEA) and 57% hydroiodic acid (HI solution) in stoichiometric molar ratio 1,4-butanediamine:HI=1:2 at room temperature The reaction was stirred for 2 h to obtain 1,4-butanediamine iodine (BEAI 2 ) solution;

[0024] (2), synthesis (BEA) 0.5 (CH 3 NH 3 ) 3 Pb 3 I 10 Single crystal material: lead acetate (Pb(Ac) 2 ) was dissolved in a mixed solution of hydroiodic acid (HI) with a mass content of 57% of hydroiodic acid and an aqueous solution of hypophosphorous acid with a mass content of 50%, stirred to form a uniform solution, and the temperature was controlled at 60 °C to stir for 1 h; then add iodide To the above solution, then dropwise add 1,4-butanediamine iodine (BEAI 2 ), after the dropwise addition, the temperature was controlled and stirred at 100 ℃ for 1 h; finally, after washing and filtering, (BEA) 0.5 (CH 3 NH 3 ...

Embodiment 2

[0029] A preparation method for a perovskite solar cell, the steps are as follows:

[0030] Step S1--dense titanium dioxide (TiO 2 ) film preparation:

[0031] S1.1, ultrasonically clean the FTO conductive glass with deionized water, acetone, absolute ethanol, and isopropanol for 15 minutes;

[0032] S1.2. Dry the cleaned FTO conductive glass in the air, and then treat it with ultraviolet and ozone for 15 minutes;

[0033] S1.3. Prepare 60 mL of titanium tetrachloride (TiCl 4 ) solution;

[0034] S1.4. The above cleaned FTO conductive glass is put into the prepared titanium tetrachloride solution at about 45°, and hydrolyzed in a constant temperature water bath at 70°C for 1 h, and then rinsed with water and absolute ethanol respectively;

[0035] S1.5. Anneal the FTO conductive glass at 100 °C for 1 h, that is, deposit and form a dense titanium dioxide film on the FTO conductive glass;

[0036] Step S2--Preparation of perovskite film (light absorbing layer):

[0037] S2...

Embodiment 3

[0045] The difference from Example 1 is: the prepared single crystal material is (BEA) 0.5 (CH(NH 2 ) 2 ) 3 Pb 3 I 10 , the corresponding iodide correspondingly replaced by CH(NH 2 ) 2 1, other are all with embodiment 1.

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Abstract

The invention belongs to the technical field of perovskite absorption materials, and discloses a two-dimensional perovskite light absorption material and a preparation method thereof. The molecular formula is (BEA)0.5(M)nPbnI3n+1. The preparation method comprises the following steps: (1) stirring 1,4-butanediamine and hydroiodic acid with the mass content of 50% to 60% according to a chemical metering molar ratio at room temperature for a reaction for 2 to 3 h to obtain a 1,4-butanediamine iodine solution; (2) synthesizing a (BEA)0.5(M)nPbnI3n+1 single crystal material: after mixing lead acetate, hydroiodic acid with the mass content of 50% to 60% and a hypophosphorous acid water solution with the mass content of 50% to 55%, stirring to form a uniform solution, controlling the temperatureat 60 to 80 DEG C for a stirring reaction for 1 to 2 h; then adding an iodine compound into the solution, then dropwise adding 1,4-butanediamine iodine solution, controlling the temperature at 100 to130 DEG C after dropwise adding is finished for a stirring reaction for 1 to 2 h; and finally washing and filtering to obtain the two-dimensional perovskite light absorption material. The prepared two-dimensional perovskite light absorption material is taken as a light absorption layer of a perovskite solar cell, and the corresponding solar cell has extremely high efficiency, and also has extremely high stability.

Description

technical field [0001] The invention belongs to the technical field of perovskite absorbing materials, in particular to a two-dimensional perovskite light absorbing material and a preparation method thereof. Background technique [0002] Due to the energy crisis and environmental pollution in the 21st century, solar energy, as a renewable energy source, is one of the important methods to meet the increasing energy demand worldwide. An effective way to convert solar energy into electrical energy is to prepare solar cells based on the photovoltaic effect, and to develop new types of solar cells with high efficiency, low cost and easy processing. It is the technical basis for the widespread application of solar photovoltaic power generation. Since 2009, the emerging organic-inorganic hybrid perovskite solar cells have attracted extensive attention from many scholars and industry people due to their excellent photoelectric conversion efficiency, low cost, simple preparation pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/09C07C211/04C07C209/00H01L51/42H01L51/46H01L51/48
CPCC07C211/09C07C211/04C07B2200/13H10K85/60H10K30/15Y02E10/549
Inventor 张懿强李鹏伟宋延林段艳艳李泽华彭友文芊又马家乐
Owner ZHENGZHOU UNIV
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