High-stability perovskite solar cell and preparation method thereof

A solar cell, high-stability technology, applied in the field of solar cells, can solve the problem of not obtaining the photoelectric conversion rate of the device, and achieve the effects of enhancing hydrophobic function, enhancing molecular polarity, and reducing solubility

Active Publication Date: 2019-03-29
福建泰阶建筑工程有限公司
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Problems solved by technology

But on the whole, no matter whether it is changing the additives or developing new organic hole transport materials, the photoelectric conversion rate of the perovskite solar device has not been comparable to that of the Spiro-OMeTAD system.

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  • High-stability perovskite solar cell and preparation method thereof
  • High-stability perovskite solar cell and preparation method thereof

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Embodiment Construction

[0027] A high stability perovskite solar cell provided in this embodiment has a structure such as figure 1 As shown, including FTO glass substrate 1, TiO 2 Dense layer 2 , perovskite absorption layer 3 , interface modification layer 4 , hole transport layer 5 and counter electrode 6 .

[0028] Its preparation method comprises the following steps:

[0029] S1. FTO glass etching and cleaning: use FTO glass with a square resistance of 15Ω as the substrate, etch with zinc powder and dilute hydrochloric acid (37% hydrochloric acid and water diluted at a volume ratio of 1:9), and the working electrode and counter The electrodes are separated to prevent short circuit; after etching, cut the FTO glass into 5cm×10cm each, rinse it with detergent and water, and then wash it in a diluted aqueous solution of detergent (the ratio of detergent to water is 1:30 by volume) diluted), deionized water, and ethanol for ultrasonic cleaning for 15 minutes; then soak the clean FTO glass in ethanol...

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Abstract

The invention discloses a high-stability perovskite solar cell, and relates to the technical field of solar cells. The solar cell comprises an FTO glass substrate, a TiO2 compact layer, a perovskite absorption layer, an interface modification layer, a hole transport layer and a counter electrode, which are laminated from bottom to top. According to the method, the interface modification layer is added to the interface of the perovskite and organic hole transport layer Spiro-OMeTAD, and sodium dodecyl sulfate is selected as the interface modification material. On the one hand, the sodium dodecyl sulfate has a long alkyl chain, can be greatly dissolved in isopropanol and other solvents which do not damage a perovskite thin film and can form a layer of crossed net structure on the surface ofthe perovskite thin film to enhance the hydrophobicity of the perovskite thin film; and on the other hand, due to the charged property of a molecular terminal sodium sulfonate group, the molecular polarity is enhanced, so that the solubility of molecules in chlorobenzene is reduced, a dipolar distance is easily formed between the molecules and the surface of the perovskite, the extraction of a charge interface is facilitated, and the efficiency stability of the perovskite solar cell is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a high-stability perovskite solar cell and a preparation method thereof. Background technique [0002] Traditional solar cells are subject to certain constraints in terms of preparation technology, material sources, and environmental pollution. In order to study alternatives to traditional solar cells, researchers from all over the world are constantly working on new materials, new processes, thin films, and low prices. to explore. If it has very high photoelectric conversion efficiency or low preparation cost, it has the opportunity to replace traditional solar cells and become the next generation of new high-efficiency solar cells. [0003] Recently, the new generation of hybrid organic-inorganic lead halide perovskites (CH 3 NH 3 wxya 3 , X=Cl, Br, I) has these two characteristics, showing broad application prospects. Organic-inorganic lead halide perovskites have att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48H01L51/46
CPCH10K71/12H10K85/00H10K30/10Y02E10/549
Inventor 张敬敬马建峰葛祖荣
Owner 福建泰阶建筑工程有限公司
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