Double-knot organic solar cell

A solar cell and organic technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low crystallinity of the photoactive layer film, failure to form effective current, poor stability, etc., to improve photoelectric conversion efficiency and enhance utilization efficiency , the effect of improving stability

Active Publication Date: 2014-01-22
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the low photoelectric conversion efficiency and poor stability of organic solar cells are still the main reasons restricting the practical application of organic solar cells.
This is mainly because: (1) The absorption wavelength of the electron donor material is mostly in the visible light region, and the spectral absorption range is narrow, so it cannot make full use of sunlight, especially in the near ultraviolet and near infrared regions of sunlight; (2) Part of the sunlight absorbed by the donor material will be radiated and lost in the form of near-infrared wavelength fluorescence, and no effective current will be formed.
(3) The photoactive layer film composed of donor material and acceptor material has low crystallinity and poor stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Processing of transparent G / ITO:

[0035] After etching the electrode pattern on ITO conductive glass (Zhuhai Kaiwei Electronic Components Co., Ltd., square resistance 14Ω / □, transmittance 85%), it was first cleaned with detergent, and then deionized water, absolute ethanol, acetone and isotropic Ultrasonic cleaning with propanol for 10 minutes, drying with nitrogen gas, and UV / ozone treatment for 20 minutes.

[0036] Preparation of electron transport layer:

[0037] Spin-coat ZnO film on the surface of ITO, spin-coat at 3000rpm for 30s, and anneal at 150°C for 10min.

[0038] Preparation of the photoactive layer of the bottom cell:

[0039] Weigh 12mg P3HT and 12mg PC respectively 60 BM was dissolved in 1 mL of chlorobenzene, then 1 mg of ZnTPP was added, ultrasonically treated for 0.5 h, magnetically stirred at 70°C for 4 h, and then the mixture was spin-coated on the surface of the electron transport layer with a homogenizer to form a film. The speed of the homog...

Embodiment 2

[0052] Preparation of the photoactive layer of the bottom cell:

[0053] Weigh 12mg P3HT and 12mg PC respectively 60 BM was dissolved in 1 mL of chlorobenzene, then 0.2 mg of ZnTPP was added, ultrasonicated for 0.5 h, magnetically stirred at 70°C for 4 h, and then the mixed solution was spin-coated on a homogenizer. The speed of the homogenizer is 1000rpm, spin coating for 40s, and annealed at 130°C for 10min.

[0054] Preparation of the photoactive layer of the top cell:

[0055] Weigh 10mg PBDTTT-C-T and 15mg PC respectively 70 BM was dissolved in 1mL of chlorobenzene, 2mg of SiPc solution, sonicated for 0.5h, magnetically stirred at 70°C for 4h, and then the mixed solution was spin-coated on a homogenizer. The speed of the homogenizer is 1000rpm, and the spin coating is 40s.

[0056] Other preparation methods are the same as in Example 1.

[0057] The device structure of the organic solar cell prepared by the above method is as follows figure 1 Shown: G / ITO / ZnO / P3HT:...

Embodiment 3

[0059] Preparation of the photoactive layer of the bottom cell:

[0060] Weigh 12mg P3HT and 12mg PC respectively 60 BM was dissolved in 1 mL chlorobenzene, then 0.1 mg Ir(ppy) was added 3 The solution was sonicated for 0.5 h, magnetically stirred at 70° C. for 4 h, and then the mixed solution was spin-coated on a homogenizer. The speed of the homogenizer is 1000rpm, spin coating for 40s, and annealed at 130°C for 10min.

[0061] Preparation of the photoactive layer of the top cell:

[0062] Weigh 10mg PBDTTT-C-T and 15mgPC respectively 70 BM was dissolved in 1mL of chlorobenzene, then a solution of 0.5mg of SiPc was added, ultrasonicated for 0.5h, magnetically stirred at 70°C for 4h, and then the mixed solution was spin-coated on a homogenizer. The speed of the homogenizer is 1000rpm, and the spin coating is 40s.

[0063] Other preparation methods are the same as in Example 1.

[0064] The device structure of the organic solar cell prepared by the above method is as fol...

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Abstract

A double-knot organic solar cell comprises a bottom cell and a top cell, wherein the bottom cell comprises a transparent substrate, a negative pole, an electron transfer layer, an optical activity layer, a hole transfer layer and an intermediate electrode layer; the top cell comprises an intermediate electrode layer, an electron transfer layer, an optical activity layer, a hole transfer layer and a positive pole; and the optical activity layers of the bottom cell and the top cell contain donor materials, acceptor materials and dyes, dyes include at least one short-wave dye and at least one long-wave dye, the absorption peak of the short-wave dye is 250-550 nm, and the absorption peak of the long-wave dye is 650-950 nm. According to the double-knot organic solar cell, the dyes with different wave lengths are combined and used, so that the sunlight utilization ratio is increased, and the photoelectric conversion efficiency and the stability of the solar cell are improved.

Description

technical field [0001] The invention relates to the field of organic semiconductor photoelectric devices, in particular to a double-junction organic solar cell. Background technique [0002] The semiconductor material of the photoactive layer of organic solar cells has the characteristics of simple preparation, easy modification, low price, and the ability to make large-area flexible devices, which has great potential application value. High efficiency and high stability are two important indicators to measure organic solar cells. Therefore, how to improve the photoelectric conversion efficiency and stability of organic solar cells is the current research hotspot of organic solar cells. Organic solar cells mainly use a photoactive layer composed of organic conjugated small molecules or organic conjugated polymers and fullerene derivatives to complete photoelectric conversion. In the past ten years, scientists have optimized the structure of organic solar cells by designing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46
CPCH10K85/311H10K85/30H10K85/341H10K30/211Y02E10/549
Inventor 刘贤豪侯丽新于正森陈月霞彭朝利
Owner CHINA LUCKY FILM CORP
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