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Method for improving stability of perovskite film through sulphuring treatment

A film stability, perovskite technology, applied in photovoltaic power generation, electrical components, electric solid devices, etc., can solve the problems of water vapor sensitivity, limited large-scale application, poor stability, etc., to achieve smooth surface, fast response, and stability. improved effect

Active Publication Date: 2016-09-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, low-cost and high-efficiency perovskite solar cells have become a research hotspot in the field of renewable energy. However, the organic-inorganic hybrid materials that are the core of solar cells are sensitive to water vapor and poor stability, which greatly limits their potential. Large-scale application (Yao Xin, Ding Yanli, Zhang Xiaodan, etc. A review of perovskite solar cells [J]. Acta Physica Sinica, 2015, (03): 145-152.)

Method used

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  • Method for improving stability of perovskite film through sulphuring treatment
  • Method for improving stability of perovskite film through sulphuring treatment
  • Method for improving stability of perovskite film through sulphuring treatment

Examples

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Embodiment 1

[0029] This example involves Na 2 S is dissolved in isopropanol, and then the method for obtaining the sulfur-treated perovskite film by spin-coating the perovskite film, the method includes the following steps:

[0030] 1) Add 0.0109g Na 2 S was dissolved in 1 mL of isopropanol to obtain solution A;

[0031] above Na 2 The molar concentration of S is 0.2M.

[0032] 2) Spin-coat solution A obtained in step 1) onto CH at 4000rpm for 20s 3 NH 3 PB 3 The perovskite film substrate was then annealed on a 100°C hot stage for 5 minutes.

[0033] figure 1 It is the X-ray diffraction spectrum of Example 1, from which it can be concluded that the crystal form of the sulfur-treated perovskite film obtained in Example 1 is still perovskite, and has good crystallinity; figure 2 It is a scanning electron microscope photo of Example 1, and the photo shows that the surface of the perovskite film is dense after sulfur treatment. image 3 It is the ultraviolet-visible spectrogram of t...

Embodiment 2

[0037] This embodiment relates to (NH 4 ) 2 The S solution is added in isopropanol, and then the method for obtaining the sulfur-treated perovskite film by spin-coating the perovskite film, the method comprises the following steps:

[0038] 1) Add 0.047mL (NH 4 ) 2 Solution S (concentration 2.93M) was dissolved in 1 mL of isopropanol to obtain solution A;

[0039] In the above solution A (NH 4 ) 2 The molar concentration of S is 0.14M.

[0040] 2) Spin-coat solution A obtained in step 1) onto CH at 4000rpm for 20s 3 NH 3 The PbB perovskite thin film substrate was then annealed on a 100°C hot stage for 5 min.

[0041] The fluorescence properties of the films obtained in this implementation case were placed under 60% humidity for 15 days, and the fluorescence properties of the films after sulfur treatment were far stronger than those of the sample without sulfur treatment in Comparative Example 1 ( Figure 5 ). It shows that the stability of the perovskite film after s...

Embodiment 3

[0043] This embodiment relates to (NH 4 ) 2 The S solution is added in isopropanol, and then the method for obtaining the sulfur-treated perovskite film by spin-coating the perovskite film, the method comprises the following steps:

[0044] 1) Add 0.047mL (NH 4 ) 2 Solution S (concentration 2.93M) was dissolved in 1 mL of isopropanol to obtain solution A;

[0045] In the above solution A (NH 4 ) 2 The molar concentration of S is 0.18M.

[0046] 2) Spin-coat the solution A obtained in step 1) onto CH at 3000rpm for 30s 3 NH 3 The PbB perovskite thin film substrate was then annealed on a 90°C hot stage for 10 min.

[0047] The fluorescent performance of the film obtained in this embodiment case is consistent with that of Example 1 after being placed at 60% humidity for 15 days, and the prepared perovskite film has high stability.

[0048] In summary, the present invention uses sulfur-containing inorganic salts to treat the perovskite film, so that the stability of the p...

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Abstract

The invention provides a method for improving stability of a perovskite film through sulphuring treatment. The perovskite film is processed by sulfur-containing inorganic salts to form a protection layer on the surface of the perovskite film, thereby improving stability of the film. The method comprises the following steps: applying a solution containing sulfur ions to a lead halide perovskite film under a certain condition, and then, carrying out annealing processing to obtain the perovskite film wrapped by the lead sulfide. The method can improve humidity resistance and stability of the perovskite film obviously, and has great significance to practical application.

Description

technical field [0001] The invention relates to a method for improving the stability of an organic-inorganic hybrid perovskite material, in particular to a method for improving the stability of a perovskite film by sulfur treatment. Background technique [0002] In recent years, low-cost and high-efficiency perovskite solar cells have become a research hotspot in the field of renewable energy. However, the organic-inorganic hybrid materials that are the core of solar cells are sensitive to water vapor and poor stability, which greatly limits their potential. Large-scale application (Yao Xin, Ding Yanli, Zhang Xiaodan, etc. A review of perovskite solar cells [J]. Acta Physica Sinica, 2015, (03): 145-152.). Therefore, it is of great practical significance to explore ways to improve the stability of organic-inorganic hybrid perovskite materials. Contents of the invention [0003] In view of the defects in the prior art, the purpose of the present invention is to provide a me...

Claims

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Application Information

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IPC IPC(8): H01L51/48
CPCH10K71/311Y02E10/549
Inventor 赵一新钱旭芳张太阳李戈郭男杰岳东亭阚淼
Owner SHANGHAI JIAO TONG UNIV
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