Novel perovskite function material and application thereof in photoelectric device

A technology of perovskite materials and functional materials, applied in electric solid devices, electrical components, semiconductor devices, etc., can solve problems such as efficiency, cost, stability, etc., to improve efficiency and stability, improve crystalline performance, The effect of improving photoelectric conversion efficiency and stability

Active Publication Date: 2019-04-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an emerging photovoltaic device that is finally on the road to commercialization, it must withstand the challenge of working stably under outdoor conditions for 25 years. Perovskite solar cells have to face practical problems such as efficiency, cost, and stability issues.

Method used

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  • Novel perovskite function material and application thereof in photoelectric device
  • Novel perovskite function material and application thereof in photoelectric device
  • Novel perovskite function material and application thereof in photoelectric device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this example, preferably A is CH 3 NH 3 + , B is Pb 2+ , X is I - , the specific implementation steps of the device preparation are as follows:

[0036] (1) Weigh 461mg PbI 2 , 159mg CH 3 NH 3 I (according to stoichiometric ratio 1:1) and 9.553mg C (NH 2 ) 3 Cl;

[0037] (2) Dissolve the raw materials in step (1) together in 1000 μl N,N-dimethylformamide (DMF) to obtain CH 3 NH 3 PB 3 0.1C(NH 2 ) 3 Cl precursor solution;

[0038] (3) Preparation of all-solid-state printable perovskite solar cells based on carbon electrodes, that is, using screen printing technology to print titanium dioxide working electrodes, insulating layers, and mesoporous carbon counter electrodes;

[0039] (4) Take an appropriate amount of perovskite precursor solution and fill it into the solar cell obtained in step (3), and anneal at 100° C. for 10 minutes.

[0040] Among them, during the annealing process, vacuuming is used to control the volatilization rate of the solvent at...

Embodiment 2

[0044] In this example, preferably A is CH 3 NH 3 + , B is Pb 2+ , X is I- , the specific implementation steps of the device preparation are as follows:

[0045] (1) Weigh 461mg PbI 2 , 143.1mg CH 3 NH 3 I and 18.698mg C(NH 2 ) 3 I;

[0046] (2) Dissolve the raw materials in step (1) together in 1000 μl dimethyl sulfoxide (DMSO) to obtain [C(NH 2 ) 3 ] 0.1 (CH 3 NH 3 ) 0.9 PB 3 Precursor solution;

[0047] (3) Preparation of all-solid-state printable perovskite solar cells based on carbon electrodes, that is, using screen printing technology to print titanium dioxide working electrodes, insulating layers, and mesoporous carbon counter electrodes;

[0048] (4) Take an appropriate amount of perovskite precursor solution and fill it into the solar cell obtained in step (3), and anneal at 100° C. for 30 minutes.

[0049] The open circuit voltage (V oc ), short circuit current (J sc ), fill factor (FF) and photoelectric conversion efficiency (PCE) have been great...

Embodiment 3

[0052] In this example, preferably A is CH 3 NH 3 + , B is Pb 2+ , X is I - , the specific implementation steps of the device preparation are as follows:

[0053] (1) Weigh 368.8mg PbI 2 , 127.2mg CH 3 NH 3 I (according to stoichiometric ratio 1:1) and 15.2848mg C (NH 2 ) 3 Cl;

[0054] (2) Dissolve the raw materials in step (1) together in 1000 μl N,N-dimethylformamide (DMF) to obtain CH 3 NH 3 PB 3 0.2C(NH 2 ) 3 Cl precursor solution;

[0055] (3) Preparation of all-solid-state printable perovskite solar cells based on carbon electrodes, that is, using screen printing technology to print titanium dioxide working electrodes, insulating layers, and mesoporous carbon counter electrodes;

[0056] (4) Take an appropriate amount of perovskite precursor solution and fill it into the solar cell obtained in step (3), and anneal at 90° C. for 25 minutes.

[0057] The open circuit voltage (V oc ), short circuit current (J sc ), fill factor (FF) and photoelectric conve...

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Abstract

The invention discloses a novel perovskite function material and application thereof in a photoelectric device. The novel perovskite function material is applied to alloyed or modified perovskite materials based on amidine molecules, and the perovskite materials are ABX3 perovskite materials, wherein A is univalent organic or inorganic positive ions, B is divalent metal positive ions, and X is univalent negative ions. The chemical expression of the amidine molecules is R-C(=NH)NH2, wherein R is any one of -NH2, -CH3 and -C6H5. According to specific application, the A-site positive ions in theperovskite materials are replaced with the positive ions of the amidine molecules, or the amidine molecules serve as an additive to be added to a base of the ABX3 perovskite materials. According to the novel perovskite function material and application thereof in the photoelectric device, the amidine molecules of a specific chemical structure are introduced into the ABX3 perovskite-based materials, the fluorescent lifetime of a carrier can be remarkably prolonged, the perovskite photoelectric function material excellent in optical and electrical performance can be obtained, the reparation process is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the field of optoelectronic functional materials, and more specifically relates to a novel perovskite functional material and its application in optoelectronic devices. The perovskite-based novel perovskite-based material is produced by applying amidine molecules in the perovskite-based material. Functional material, the novel perovskite functional material can be especially applied in optoelectronic devices. Background technique [0002] Energy provides an important material basis for human survival and development. With the rapid development of industrial technology, the rapid development of science and technology, the continuous improvement of living standards, the world's population is also growing rapidly, and human demand for resources and energy is increasing day by day. However, traditional fossil fuels are not only non-renewable, but also have limited reserves. Only by developing and promoting safe, new and renewable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/24H01L51/46
CPCC07F7/24H10K85/30
Inventor 韩宏伟胡玥张智慧荣耀光梅安意
Owner HUAZHONG UNIV OF SCI & TECH
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