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Perovskite material and solar cell

A technology of perovskite materials and solar cells, applied in the field of perovskite materials, can solve problems affecting the practical application of perovskite solar cells, and achieve the effects of improving electron mobility, chemical stability, and stability.

Active Publication Date: 2016-01-06
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

Therefore, MAPbI 3 , FAPbI 3 The stability of these perovskite materials has seriously affected the practical application of perovskite solar cells.

Method used

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Embodiment Construction

[0024] The perovskite material, the preparation method of the perovskite material and the solar cell using the perovskite material of the present invention will be further described in detail below with reference to the drawings and specific examples.

[0025] The invention provides a perovskite material, which is an inorganic hybrid perovskite material. The chemical formula of the perovskite material is A mix BX 3 .

[0026] Wherein, B can be selected from Pb 2+ , Sn 2+ 、 Ge 2+ and mixed metal cations, such as Sn i Pb (1-i) Cation, Sn j Ge (1-j) Cation, Pb k Ge (1-k) One of the cations. Among them, 0k Ge (1-k) When , under the optimal ratio of 0.3j Ge (1-j) When , under the optimal ratio of 0.1<j<0.5, the stability of the corresponding perovskite material is further improved, and the absorption bandgap and carrier transport characteristics can be effectively adjusted.

[0027] X can be selected from I - 、Br - , Cl - And mixed halide ions, such as I 3-m Cl m...

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Abstract

The invention relates to a perovskite material. The perovskite material has a chemical formula of AmixBX3, wherein Amix is prepared from at least one organic amino Ao and one inorganic cation AI through mixing according to different proportions, wherein the inorganic cation AI is one selected from the group consisting of CS+, Rb+ and K+; B is one selected from the group consisting of Pb2+, Sn2+, Ge2+ and SniPb (1-i) cations, SnjGe (1-j) cations and PbkGe (1-k) cations, wherein i is more than 0 and less than 1, j is more than 0 and less than 1, and k is more than 0 and less than 1; and X is one selected from the group consisting of I-, Br-, Cl- and I3-mClm anions, I3-nBrn anions and Br3-uClu anions, wherein m is more than 0 and less than 3, n is more than 0 and less than 3, and u is more than 0 and less than 3. The invention also relates to a solar cell prepared from the perovskite material.

Description

technical field [0001] The invention relates to a perovskite material, which can be applied to solar cells. Background technique [0002] Perovskite materials generally refer to a class of calcium titanate (CaTiO 3 ) Compounds with the same or similar crystal structure, the molecular formula is ABX 3 . Since it was first discovered in the calcium titanate compound, it was named perovskite material. See figure 1 , in the perovskite material, the B positive ion and the adjacent X negative ion form a coordinated octahedral structure, and the B positive ion is located in the center of the octahedron, and the octahedrons are connected with each other to form a three-dimensional network structure. The unit cell composed of the multiple octahedrons has vacancies in its center, and A positive ions conforming to a certain radius occupy these vacancies and maintain the original three-dimensional network structure. [0003] In recent years, solar cells based on perovskite material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F19/00H01L31/032
Inventor 乔娟马福生李闻哲王立铎
Owner TSINGHUA UNIV
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