Method for regulating and controlling longitudinal morphology of organic solar cell through solvent annealing post-treatment

A technology of solar cells and organic electronics, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problem that there is no reasonable and universal method for the regulation of the longitudinal morphology of the active layer, and the research on the regulation of solar cell morphology is not comprehensive enough, etc. The problem is to achieve the effect of simple and feasible preparation method, vertical improvement and efficiency improvement.

Pending Publication Date: 2022-07-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chunyu Xu et al. introduced the third component Y6 into the binary small molecule DR3TSBDT:PC71BM, which improved the photoelectric active layer and increased its photoelectric conversion efficiency to 12.84% (NanoEnergy 2019, 66, 104119.), previous literature records for solar energy The research on the morphology control of the battery is not comprehensive enough, and there is no reasonable and universal method for the regulation of the longitudinal morphology of the active layer.

Method used

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  • Method for regulating and controlling longitudinal morphology of organic solar cell through solvent annealing post-treatment
  • Method for regulating and controlling longitudinal morphology of organic solar cell through solvent annealing post-treatment
  • Method for regulating and controlling longitudinal morphology of organic solar cell through solvent annealing post-treatment

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Experimental program
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Effect test

Embodiment 1

[0046] Fine tuning of the longitudinal morphology of the active layer by DCM solvent vapor annealing

[0047] 1. Cleaning of ITO conductive glass: The ITO substrate was repeatedly ultrasonically cleaned with deionized water for 4 times for 15 minutes, and isopropanol for 30 minutes respectively. After cleaning, it was placed in a drying oven at 70 °C for drying and preservation.

[0048] 2. Preparation of anode transport layer: The purchased PEDOT:PSS (4083) was spin-coated on an ITO substrate at 3000 rpm, and then baked at a high temperature of 150° C. for 15 minutes, with a thickness of about 40 nm.

[0049] 3. Preparation of the organic photoactive layer: the mass ratio of the donor and the acceptor DR3TSBSDT:Y6:PC71BM is 1.25:0.6:0.4, and the concentration of the mixed solution of the donor and the acceptor is 18 mg / mL; The bulk mixed solution uses an organic solvent as the main solvent CF to prepare a photoactive layer with a thickness of about 120 nm.

[0050] 4. Post-t...

Embodiment 2

[0055] Fine tuning of the longitudinal morphology of the active layer by CF solvent vapor annealing

[0056] 1. Cleaning of ITO conductive glass: The ITO substrate was repeatedly ultrasonically cleaned with deionized water for 4 times for 15 minutes, and isopropanol for 30 minutes respectively. After cleaning, it was placed in a drying oven at 70 °C for drying and preservation.

[0057] 2. Preparation of anode transport layer: The purchased PEDOT:PSS (4083) was spin-coated on an ITO substrate at 3000 rpm, and then baked at a high temperature of 150° C. for 15 minutes, with a thickness of about 40 nm.

[0058] 3. Preparation of the organic photoactive layer: the mass ratio of the donor and the acceptor DR3TSBSDT:Y6:PC71BM is 1.25:0.6:0.4, and the concentration of the mixed solution of the donor and the acceptor is 18 mg / mL; The bulk mixed solution uses an organic solvent as the main solvent CF to prepare a photoactive layer with a thickness of about 120 nm.

[0059] 4. Post-tr...

example 1

[0065] The structural formulas of the fullerene acceptors in Examples 1 and 2 are shown below:

[0066]

[0067] The structural formulas of the small molecule receptors in Examples 1 and 2 are shown below:

[0068]

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Abstract

The invention discloses a method for regulating and controlling the longitudinal morphology of an organic solar cell through solvent annealing post-treatment. The invention belongs to the field of solar cells. The organic solar cell device is composed of a bottom substrate, a conductive anode, a hole transport layer, an organic photoactive layer, an electron transport layer and a metal cathode, wherein the photoactive layer is a bulk heterojunction formed by blending an organic electron donor material and an organic electron acceptor material. The method is characterized in that the longitudinal morphology of the active layer is regulated and controlled through solvent annealing treatment by adopting solvent steam treatment, so that all components in the active layer are reasonably and longitudinally separated. According to the method, the short-circuit current and the filling factor of the solar cell can be remarkably improved, and the photoelectric conversion efficiency of the full-small-molecule organic solar cell is improved.

Description

technical field [0001] The invention belongs to the field of organic optoelectronic devices, and in particular relates to a method for adjusting the longitudinal morphology of an organic solar cell after solvent annealing. Background technique [0002] In recent years, thanks to the rapid development of corresponding materials and device technologies, the organic semiconductor industry has developed rapidly. Compared with inorganic semiconductors, organic materials have the advantages of low processing cost, easy preparation and solution processing, easy preparation of large-area devices, light weight and flexible curling, which makes organic solar cells gradually become the research focus of researchers in the field of photovoltaics. Now polymer-small molecule organic solar cells have exceeded 18% of single cells, but the development of all-small molecule organic solar cells is still relatively slow. [0003] Photoelectric conversion rate, as an important indicator of orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48
CPCH10K71/441Y02P70/50
Inventor 何志才吴依帆
Owner SOUTH CHINA UNIV OF TECH
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