Preparation method of optical activity layer of polymer solar cell

A technology for solar cells and photoactive layers, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as difficult removal of surface modifiers, dispersants, impact on solar cell device performance, complexity, etc., to improve light absorption performance and carrier transport performance, improved photoelectric conversion efficiency, and stable performance

Inactive Publication Date: 2010-12-01
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Traditionally, inorganic semiconductor nanocrystals are prepared first, and then incorporated into polymer solar cells. This method requires complex physical and chemical preparation steps of nanocrystals, and it is not easy to remove the surface added in the nanocrystal preparation step. Modifiers, dispersants, etc., which in turn affect the performance of solar cell devices

Method used

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  • Preparation method of optical activity layer of polymer solar cell
  • Preparation method of optical activity layer of polymer solar cell
  • Preparation method of optical activity layer of polymer solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Dissolve lead methacrylate in methacrylic acid to obtain a solution of 1440mg / mL; (2) Combine poly(3-hexyl)thiophene (P3HT) and C with a mass ratio of 1:1 60 Dissolve in o-dichlorobenzene to obtain a solution with a P3HT concentration of 17mg / mL. Place the solution at 50°C and stir for 12 hours to fully dissolve; (3) Mix the above two solutions at a volume ratio of 1:20. Stir at 50℃ for 12 hours, spin-coated film, place the composite film in H at room temperature 2 In an atmosphere of S for 1 hour, a photoactive film doped with PbS nanocrystals is obtained. The size of the nanocrystals is 3-6nm as measured by high-resolution transmission electron micrographs, such as figure 1 As shown, calculated by the reaction equation, the mass percentage of PbS nanocrystals is 43.4%, the mass percentage of poly(3-hexyl)thiophene (P3HT) is 28.3%, C 60 The mass percentage content is 28.3%. The PbS nanocrystal-doped photoactive film spin-coated on PEDOT:PSS / ITO was vapor-deposited wit...

Embodiment 2

[0029] (1) Dissolve lead methacrylate in methacrylic acid to obtain a solution of 1440mg / mL; (2) Combine poly(3-hexyl)thiophene (P3HT) and C with a mass ratio of 1:1 60 Dissolve in o-dichlorobenzene to obtain a solution with a P3HT concentration of 17mg / mL. Place the solution at 50°C and stir for 12 hours to fully dissolve; (3) Mix the above two solutions at a volume ratio of 1:20. Stir at 50℃ for 12 hours, spin-coated film, place the composite film in H at room temperature 2 In a Se atmosphere for 1 hour, a photoactive film doped with PbSe nanocrystals was obtained. The size of the nanocrystals was 3-6nm measured by high-resolution transmission electron microscopy. The mass percentage of PbSe nanocrystals was calculated by the reaction equation to be 51.8%. The mass percentage of (3-hexyl)thiophene (P3HT) is 24.1%, C 60 The mass percentage content is 24.1%. The photoactive film doped with PbSe nanocrystals spin-coated on PEDOT:PSS / ITO was vapor-deposited with a metal aluminum e...

Embodiment 3

[0031] (1) Dissolve lead methacrylate in methacrylic acid to obtain a solution of 240mg / mL; (2) Combine poly(3-hexyl)thiophene (P3HT) and C with a mass ratio of 1:1 60 Dissolve in o-dichlorobenzene to obtain a solution with a P3HT concentration of 17mg / mL. Place the solution at 50°C and stir for 12 hours to fully dissolve; (3) Mix the above two solutions at a volume ratio of 1:5. Stir at 50℃ for 12 hours, spin-coated film, place the composite film in H at room temperature 2 In an S atmosphere for 1 hour, a photoactive film doped with PbS nanocrystals is obtained, the size of the nanocrystals is 10-40nm, such as figure 2 As shown, the mass percentage of PbS nanocrystals calculated by the reaction equation is 37.2%, and the mass percentage of poly(3-hexyl)thiophene (P3HT) is 31.4%, C 60 The mass percentage content is 31.4%. The PbS nanocrystal-doped photoactive film spin-coated on PEDOT:PSS / ITO was vapor-deposited with a metal aluminum electrode to obtain a polymer solar cell. The...

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Abstract

The invention discloses an optical activity layer of a polymer solar cell doped with an inorganic semiconductor nanocrystal and a preparation method thereof. The method comprises the following steps of: (1) dissolving inorganic salts of Pb, Cd or Zn into methacrylic acid or acrylic acid to obtain the inorganic salt solution of the Pb, Cd or Zn; (2) dissolving an optical active substance of a polymer solar cell into ortho-dichlorobenzene or chlorobenzene and stirring the mixture to obtain a solution of the optical active substance of the polymer solar cell; (3) mixing and stirring the inorganic salt solution obtained in the step (1) with the solution of the optical active substance of the polymer solar cell obtained in the step (2) to obtain a mixed solution; and (4) spinning the mixed solution obtained in the step (3) to form a film, placing the film in the H2S or H2Se atmosphere, treating for 10-120 minutes and taking out the treated film. The method is free from using complicated physical or chemical process steps for preparing nanocrystals, has the characteristics of simple process, low cost, controllable size and content of nanocrystals and the like and is applied to the large-scale industrial production.

Description

Technical field [0001] The invention relates to a photoactive layer of a polymer solar cell doped with inorganic semiconductor nanocrystals and a preparation method thereof. Background technique [0002] Solar energy is the most ideal alternative energy source for mankind in the future, and solar cells that convert solar energy into electrical energy are currently a hot spot in research in various countries. Polymer solar cells have the advantages of low price, flexibility, easy processing, and large area preparation. Further improving the photoelectric conversion efficiency of polymer solar cells is a prerequisite for large-scale industrial applications. The photoelectric conversion efficiency of polymer solar cells depends on the absorption of the solar radiation spectrum by the photoactive layer and the separation and transmission efficiency of carriers. [0003] Inorganic semiconductor nanocrystals are a kind of optoelectronic materials with good light absorption and electron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46H01L51/44
CPCY02E10/549
Inventor 刘瑞刚刘伟丽王文黄勇
Owner INST OF CHEM CHINESE ACAD OF SCI
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