Lead-free hybrid two-dimensional double perovskite material and preparation method thereof

A double perovskite and hybrid technology is applied in the fields of material science and technology and optoelectronic applications, which can solve the problems of inability to prepare and complex systems, and achieve the effects of good chemical stability, simple synthesis method and high yield.

Inactive Publication Date: 2019-02-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The inventive new compound called AMV-32 described in the current research works on improving photoelectric conversion efficiency involves replacing some harmful substances like PbO3 that have been used previously. It also includes other elements like Fe(II) which helps improve its performance over previous methods due to their environmental friendliness compared to existing ones. Overall, it provides technical benefits including improved durability against degrading caused by exposure to sunlight during storage, reduced production costs, simplified manufacturing processes, enhanced purifying effectiveness, ease of use, etc., making them ideal candidates for applications involving optoelectronics devices such as thin films made from these compositions.

Problems solved by technology

This patented technical problem addressed in the patents relates to finding stable or cost-effective compositions containing both iron(II)-manganese bimuthum oxide (FeMBIO2) and lithiocyanate ion pairs, which could provide excellent optoelectronics properties like strong absorption coefficients at specific wavelength regions.

Method used

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  • Lead-free hybrid two-dimensional double perovskite material and preparation method thereof
  • Lead-free hybrid two-dimensional double perovskite material and preparation method thereof
  • Lead-free hybrid two-dimensional double perovskite material and preparation method thereof

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Effect test

Embodiment 1

[0043] 0.466g bismuth oxide (Bi 2 o 3 ) and 0.340g silver nitrate (AgNO 3 ) was mixed with 5ml of hydroiodic acid, and then slowly added 0.456g of 1,4-cyclohexanediamine. Transfer the mixture into a polytetrafluoroethylene-lined stainless steel reaction kettle, place the reaction kettle in an oven at 120°C, and heat and react for 10 hours under the pressure naturally generated by the reaction kettle;

[0044] After the completion of the reaction, the reactor program was controlled to lower the temperature for 5 hours, and the crystals generated in the reactor were removed and washed 5 times repeatedly with dehydrated alcohol, dried, and finally obtained pure dark red (C 6 h 16 N 2 ) 2 BiAgI 8 Crystalline with a crystal yield greater than 95% (calculated based on Bi). The crystal contains a novel inorganic layer in the form of a two-dimensional perovskite, with spatially alternating inorganic and organic layers. The crystal structure was determined by single crystal X-r...

Embodiment 2

[0047] 0.466g bismuth oxide (Bi 2 o 3 ) and 0.380g cuprous iodide (CuI) were mixed with 5ml hydroiodic acid, and then slowly added 0.456g 1,4-cyclohexanediamine. Transfer the mixture into a polytetrafluoroethylene-lined stainless steel reaction kettle, place the reaction kettle in an oven at 130°C, and heat and react for 10 hours under the pressure naturally generated by the reaction kettle;

[0048] After the completion of the reaction, the reactor program was controlled to lower the temperature for 5 hours, and the crystals generated in the reactor were removed and washed 5 times repeatedly with dehydrated alcohol, dried, and finally obtained pure red-black (C 6 h 16 N 2 ) 2 BiCuI 8 Crystalline with a crystal yield greater than 90% (calculated based on Bi). The crystal and (C 6 h 16 N 2 ) 2 BiAgI 8 The crystals are similar, containing a novel 2D perovskite form of inorganic layers with spatially alternating inorganic and organic layers. The crystal structure was ...

Embodiment 3

[0051] 0.466g bismuth oxide (Bi 2 o 3 ) and 0.380g cuprous iodide (CuI) mixed with 5ml hydroiodic acid, then slowly added 0.792g cyclohexylamine. Transfer the mixture into a polytetrafluoroethylene-lined stainless steel reaction kettle, place the reaction kettle in an oven at 130°C, and heat and react for 10 hours under the pressure naturally generated by the reaction kettle;

[0052] After the completion of the reaction, the reactor program was controlled to lower the temperature for 5 hours, and the crystals generated in the kettle were removed and then repeatedly suction-filtered with sherwood oil, dried, and finally obtained pure (C 6 h 14 N) 4 BiCuI 8 Crystalline with a crystal yield greater than 90% (calculated based on Bi). The concrete contains a novel structure in which two-dimensional inorganic layers and base layers are alternately arranged. The crystal structure was determined by single crystal X-ray diffraction analysis, and the phase purity was determined b...

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Abstract

The invention provides a two-dimensional double perovskite material. The composition formula of the two-dimensional double perovskite material is AnMIIIMIX8, wherein A is organic amine; MIII is a trivalent metal element; MI is a monovalent metal element; and X is halogen. The two-dimensional double perovskite material has certain advantages of methylamine lead-iodine perovskite and lead-free double perovskite. The material is lead-free and environmentally friendly, has very good light stability and good chemical stability, and is unlikely to deteriorate in air. The material has a suitable andadjustable light absorption band gap, and more importantly can be used for preparing a film at a low temperature by a solution method. The advantages provide basis for the application of the materialin the photovoltaic fields such as solar cells, optical detectors and light-emitting diodes.

Description

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Claims

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Application Information

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Owner XI AN JIAOTONG UNIV
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