An organic-inorganic hybrid perovskite mapbbr with a gradient band structure 3 Materials and methods of making the same

A technology of energy band structure and perovskite, applied in the field of solar photoelectric conversion, can solve the problems of complicated preparation and the like, and achieve the effect of simple preparation method and low cost

Inactive Publication Date: 2017-05-03
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This covers almost all visible light regions, and multi-color solar cells can be realized by adjusting the content of Br, but the preparation of this material is slightly cumbersome and requires PbI 2 , PbBr 2

Method used

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  • An organic-inorganic hybrid perovskite mapbbr with a gradient band structure <sub>3</sub> Materials and methods of making the same
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  • An organic-inorganic hybrid perovskite mapbbr with a gradient band structure <sub>3</sub> Materials and methods of making the same

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Embodiment 1

[0041] An organic-inorganic hybrid perovskite MAPbBr with gradient energy band structure 3 The preparation method of film material, comprises the following steps:

[0042] (1) Clean the glass slides with water, then ultrasonically clean them in pure solvents of acetone and ethanol for 10 minutes, and then in deionized water, ultrasonically oscillate for 10 minutes, repeat two or three times, and clean the slides. Slides were dried for later use.

[0043] (2) Select excess MABr and PbBr 2 According to the stoichiometric molar ratio of 3:1, prepare a nearly saturated N,N-dimethylformamide (DMF) solution.

[0044] (3) The prepared DMF solution was magnetically stirred for 30 min under nitrogen protection to obtain a film-forming solution.

[0045] (4) The cleaned glass slide was used as a substrate, and was spin-coated with a desktop coater at 3500 rpm and 5000 rpm under nitrogen protection for 15 s and 30 s, respectively, to obtain a yellow film. The thickness of the film is...

Embodiment 2

[0053] With embodiment 1, difference is, select excessive MABr and PbBr 2 According to the stoichiometric molar ratio of 3:1, it was prepared as a N,N-dimethylformamide (DMF) solution with a concentration of 191mg / ml.

Embodiment 3

[0055] With embodiment 1, difference is, select excessive MABr and PbBr 2 According to the stoichiometric molar ratio of 3:1, it was prepared as a N,N-dimethylformamide (DMF) solution with a concentration of 250mg / ml.

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Abstract

The invention discloses an organic-inorganic hybrid perovskite MAPbBr3 film material with a gradient energy band structure. The optical band gap of the MAPbBr3 film material is adjustable from 1.36-2.47eV, wherein MA represents an organic cation CH3NH3+, and the MAPbBr3 film material The thickness of the film is in the range of 40nm‑100nm. The invention also discloses a preparation method of the organic-inorganic hybrid perovskite MAPbBr3 film material with gradient energy band structure.

Description

technical field [0001] The invention relates to the field of solar photoelectric conversion. More specifically, it relates to an organic-inorganic hybrid perovskite MAPbBr with a gradient band structure 3 Materials and their preparation methods. Background technique [0002] With the aggravation of environmental pollution, replacing traditional fossil energy with clean energy can fundamentally alleviate the energy crisis and solve ecological and environmental problems. Solar cells have always been a hot spot in the research of clean and renewable energy. In 2013, organic-inorganic hybrid perovskite solar cells emerged. Due to its simple preparation method, low cost, and high photoelectric conversion efficiency (it reached 19.3% in 2014), it is expected to replace traditional solar cells. [0003] The most common organic-inorganic perovskite-type optoelectronic materials are methylamine lead halide materials (CH 3 NH 3 wxya 3 , X=Br, Cl, I). Such materials include orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/46H01L51/48
CPCH10K71/12H10K85/00Y02E10/549
Inventor 闫君陈云琳柯笑晗张翱张冰
Owner BEIJING JIAOTONG UNIV
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