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Bromide doped methylamine lead iodide perovskite solar cell and manufacturing method thereof

A technology of solar cells, methylamine lead iodine, applied in the field of solar cells, can solve the problems of fast reaction speed, short-circuit current reduction, and limitation of battery photoelectric conversion efficiency, etc., and achieve the effect of fast reaction speed

Inactive Publication Date: 2017-10-10
TAIYUAN UNIV OF TECH
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Problems solved by technology

In 2014, the Karunadasa team at Stanford University proposed a post-synthesis method to obtain MAPbBr 3 Thin film method, that utilizes bromine gas Br 2 (obtained by diluting saturated bromine gas 400 times with dry nitrogen gas) to MAPbI 3 Perovskite film treated for 8 minutes to obtain MAPbBr 3 Thin films, this method replaces iodide ions with bromide ions, and the reaction speed is fast, and it is not easy to achieve trace doping of bromine elements [Chem. Sci., 2015, 6, 4054]
The MAPb (I) prepared by the above-mentioned method 1−x Br x ) 3 The thin film also has the problem of reducing the short-circuit current and offsetting the open-circuit voltage to varying degrees, which limits the improvement of the photoelectric conversion efficiency of the battery

Method used

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  • Bromide doped methylamine lead iodide perovskite solar cell and manufacturing method thereof
  • Bromide doped methylamine lead iodide perovskite solar cell and manufacturing method thereof
  • Bromide doped methylamine lead iodide perovskite solar cell and manufacturing method thereof

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Embodiment Construction

[0026] Bromine doped methylamine lead iodine perovskite solar cell manufacturing method, according to the following steps

[0027] Step 1. Deposit a uniform layer of indium tin oxide ITO on the glass substrate as the anode of the battery; the thickness of the ITO anode is 100 nm, and the sheet resistance is 10Ω / □.

[0028] Step 2. Deposit a layer of poly(3,4-ethylenedioxythiophene)-polystyrenesulfonate PEDOT:PSS film with a thickness of 30 nm on the indium tin oxide ITO layer as a hole transport layer; The film was then thermally annealed in air with a spin-coating rate of 5000 rpm, a spin-coating time of 30 s, a heating temperature of 120 °C, and a heating time of 15 min.

[0029] Step 3, depositing a photosensitive layer on the PEDOT:PSS film; the photosensitive layer is CH 3 NH 3 PB 3-x Br x Perovskite thin films prepared from methylamine iodide (CH 3 NH 3 I), lead iodide (PbI 2 ) was dissolved in a mixed solvent of N,N-dimethylformamide (DMF) and dimethyl sulfoxide ...

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Abstract

The present invention belongs to the field of solar cells, and in particular to an organic-inorganic hybrid perovskite solar cell. The photosensitive layer of the bromine doped methylamine lead iodine perovskite solar cell is a bromine-doped methylamine lead iodine perovskite CH3NH3PbI3-XBrx film formed by the mixing and dissolving of methyl iodized amine CH3NH3I and iodized lead PbI2 in N, N-dimethylformamide DMF and dimethyl sulfoxide DMSO mixed solvent to develop the CH3NH3PbI3 perovskite precursor solution, and then formed by spin-coating and cleaning processes combined with multi-step atmosphere annealing process. In the CH3NH3PbI3-XBrx film, the value of the bromine content x is between 0.2 and 0.6. The invention also relates to a method of manufacturing the solar cell.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to an organic-inorganic hybrid perovskite solar cell. Its photosensitive layer is an organic-inorganic hybrid perovskite material with the chemical formula AMX 3 (A:CH 3 NH 3 + ; M: Pb 2+ ;X:I — 、Br — Halogen ions), AMX 3 The unit cell structure is a three-dimensional octahedron, NH 3 CH 3 + At the octahedral vertices, Pb 2+ At the body center, the halogen element ions are at the face center. Background technique [0002] A solar cell is a device that directly converts solar energy into electrical energy, and is the core component of solar photovoltaic power generation. At present, silicon-based solar cell technology is relatively mature, but there are problems such as high energy consumption, high cost, serious environmental pollution, and long cost recovery time in the production process, while perovskite solar cells have simple structure, easy processing, low cost, and can ...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/40H10K85/60H10K30/10Y02E10/549Y02P70/50
Inventor 郝玉英尉渊房晓红刘红利张帆李战峰孙钦军崔艳霞
Owner TAIYUAN UNIV OF TECH
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