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Methyl amino lead iodide bismuth perovskite crystal light absorption layer material and preparation method thereof

A perovskite and light absorption technology, applied in the field of solar cells, can solve the problems of battery instability, poor stability, and large crystal tolerance factor, and achieve the effects of less lead content, improved material stability, and reduced lead content

Active Publication Date: 2016-08-03
XIAN POLYMER LIGHT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of this material is poor, and it is easy to decompose in the air and the presence of toxic lead elements cuts off the road to industrial production of this type of perovskite solar cells.
In 2014, scientists replaced the lead element in the perovskite material with selenium, the main group element of lead, to reduce the toxicity of the material. However, due to the large crystal tolerance factor, the stability of the material was destroyed, making the prepared battery extremely unstable.[ YuheiOgomietal.CH 3 NH 3 sn x Pb (1-x) I 3 PerovskiteSolarCellsCoveringupto1060nm.J.Phys.Chem.Lett,2014,5,1004-1011]

Method used

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  • Methyl amino lead iodide bismuth perovskite crystal light absorption layer material and preparation method thereof
  • Methyl amino lead iodide bismuth perovskite crystal light absorption layer material and preparation method thereof
  • Methyl amino lead iodide bismuth perovskite crystal light absorption layer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Press x=0, BiI in a glove box with water content below 0.1ppm 3 and PbI 2 powder sum with CH 3 NH 3 I weighed and mixed the molar ratio of 1:2, put it into a quartz tube, and marked it as a1.

[0028] In a glove box with water content below 0.1ppm, according to x=0.125, BiI3 and PbI 2 powder sum with CH 3 NH 3 Weigh and mix the molar ratio of 1:2, put it into a quartz tube, and mark it as b1.

[0029] In a glove box with water content below 0.1ppm, press x=0.25, BiI 3 and PbI 2 powder sum with CH 3 NH 3 Weigh the mixture with a molar ratio of 1:2, put it into a quartz tube, and mark it as c1.

[0030] In a glove box with a water content below 0.1ppm, press x=0.5, BiI 3 and PbI 2 powder sum with CH 3 NH 3 Weigh and mix the molar ratio of 1:2, put it into a quartz tube, and mark it as d1.

[0031] In a glove box with a water content below 0.1ppm, press x=1, BiI 3 and PbI 2 powder sum with CH 3 NH 3 Weigh the mixture with a molar ratio of 1:2, put it int...

Embodiment 2

[0037] Press x=0, BiI in a glove box with water content below 0.1ppm 3 and PbI 2 powder sum with CH 3 NH 3 I weighed and mixed with a molar ratio of 1:2, put it into a quartz tube, and marked it as a2.

[0038] In a glove box with water content below 0.1ppm, according to x=0.125, BiI 3 and PbI 2 powder sum with CH 3 NH 3 Weigh and mix the molar ratio of 1:2, put it into a quartz tube, and mark it as b2.

[0039] In a glove box with water content below 0.1ppm, press x=0.25, BiI 3 and PbI 2 powder sum with CH 3 NH 3 I weighed the mixture with a molar ratio of 1:2, put it into a quartz tube, and marked it as c2.

[0040] In a glove box with a water content below 0.1ppm, press x=0.5, BiI 3 and PbI 2 powder sum with CH 3 NH 3 I weigh and mix the molar ratio of 1:2, put it into a quartz tube, and mark it as d2.

[0041] In a glove box with a water content below 0.1ppm, press x=1, BiI 3 and PbI 2 powder sum with CH 3 NH 3 I weigh and mix the molar ratio of 1:2, pu...

Embodiment 3

[0048] Press x=0, BiI in a glove box with water content below 0.1ppm 3 and PbI 2 powder sum with CH 3 NH 3 I weighed and mixed the molar ratio of 1:2, put it into a quartz tube, and marked it as a3.

[0049] In a glove box with water content below 0.1ppm, according to x=0.125, BiI 3 and PbI 2powder sum with CH 3 NH 3 I weighed and mixed the molar ratio of 1:2, put it into a quartz tube, and marked it as b3.

[0050] In a glove box with water content below 0.1ppm, press x=0.25, BiI 3 and PbI 2 powder sum with CH 3 NH 3 I weigh and mix the molar ratio of 1:2, put it into a quartz tube, and mark it as c3.

[0051] In a glove box with a water content below 0.1ppm, press x=0.5, BiI 3 and PbI 2 powder sum with CH 3 NH 3 Weigh and mix the molar ratio of 1:2, put it into a quartz tube, and mark it as d3.

[0052] In a glove box with a water content below 0.1ppm, press x=1, BiI 3 and PbI 2 powder sum with CH 3 NH 3 I weigh and mix the molar ratio of 1:2, put it into...

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Abstract

The invention provides a light absorption material of perovskite crystal of methyl amino lead iodide bismuth (for short methylamine bismuth lead iodine) and a preparation method thereof. A general formula is CH3NH3BixPb1-xI3, wherein x is 0.01-1. The crystal of the perovskite crystal light absorption material formed calcining the material under the condition of water-insulation and oxygen-insulation has the same crystal structure and similar light absorption performance of methylamine iodine lead CH3NH3PbI3. The method uses bismuth atom to substitute lead atom in CH3NH3PbI3 effectively, and the crystal structure is not changed. The lead content is reduced effectively by means of controlling the raw material ratio of bismuth to lead. The crystal material with perovskite structure of methylamine bismuth lead iodine CH3NH3BixPb1-xI3 prepared by the invention can be used for substituting the crystal material of methylamine lead iodine CH3NH3PbI3 which is used as an absorbed layer of a perovskite solar cell. Moreover, the material stability can be improved effectively, the lead content can be reduced, and the material toxicity can be reduced.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a methylamino lead bismuth iodide (abbreviated as methylamine bismuth lead iodide) CH which can be used for a light absorbing layer. 3 NH 3 Bi X Pb 1-X I 3 Crystal light-absorbing material and its preparation method. Background technique [0002] In a material, doping the same main group elements or adjacent group elements can make the material produce specific optical and electrical properties, change the chemical stability of the material, and thus have practical application value or specific use. Organic-inorganic composite metal halide perovskite materials methylamine lead iodide CH 3 NH 3 PB 3 As a light-absorbing material, it was applied in dye-sensitized solar cells in 2009, and achieved a photoelectric conversion efficiency of 3.8% [Kojima, A. et al. Organometalhalideperovskitesasvisible-lightsensitizersforphotovoltaiccells. 2009)]. The study found that the perovskite ...

Claims

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Application Information

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IPC IPC(8): C07C209/00C07C209/86C07C211/04H01L51/46H01L51/00
CPCC07C209/00C07C209/86C07C211/04C07B2200/13H10K71/162Y02E10/549
Inventor 高云邓天郭王卓夏晓红黄忠兵
Owner XIAN POLYMER LIGHT TECH
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