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Annealed free organic solar cell and production method thereof

A solar cell, annealing-free technology, applied in the field of solar cells, can solve the problems of destroying the cell structure and affecting the performance of the cell, and achieve the effect of improving transmission efficiency and reducing recombination

Inactive Publication Date: 2014-05-21
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acquisition of high-efficiency organic polymer solar cells often requires further thermal annealing, but thermal annealing will destroy the structure of the battery and affect the performance of the battery

Method used

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  • Annealed free organic solar cell and production method thereof
  • Annealed free organic solar cell and production method thereof
  • Annealed free organic solar cell and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first step is to prepare ZnO nanoparticles. Dissolve 0.799g of zinc acetate and 0.337g of potassium hydroxide in 50mL of methanol solution, then stir at 63°C for two hours to obtain a white precipitate, and centrifuge the white particles , then re-dissolved in methanol and rinsed again, then centrifuged, and washed 3 times repeatedly, and the finally obtained white precipitate was dissolved in methanol at 0.5 mg / mL and set aside. PEIE was purchased from SigmaAldrich, PEIE solution was diluted PEIE into dimethoxyethanol, the concentration of PEIE accounted for 0.04% (weight ratio) in the solution. Or refer to the literature Y. Zhou, et al, A universal method to produce low-work function electrodes for organic electronics, Science, 336, (2012) 327-332.

[0026] The second step is to configure the P3HT:PCBM organic active layer solution, 18mg of P3HT (aldrich) and 18mg of PCBM (SigmaAldrich) are dissolved in 1mL of chlorobenzene, stirred in the dark for 8 hours, and se...

Embodiment 2

[0033] The first, second and third steps are the same as in Example 1.

[0034] The fourth step is to prepare a single-layer ZnO film; spin-coat a layer of ZnO film, take 80uL of the ZnO solution prepared in the first step, and spin-coat at a speed of 2500-3000rpm; after the spin-coating is completed, put the sample in a 150°C Bake on a hotplate for 10 minutes.

[0035] The fifth and sixth steps are the same as in embodiment 1

[0036] Through the above preparation process, the conversion efficiency of the obtained organic solar cell is 2.83%. I-V curve such as image 3 shown.

Embodiment 3

[0038] The first, second and third steps are the same as in Example 1.

[0039] The fourth step is to prepare a single-layer PEIE film; spin-coat a layer of PEIE film, take 100uL of the PEIE solution prepared in the first step, and spin-coat at a speed of 4000rpm; after the spin-coating is completed, put the sample on a hotplate at 100°C Bake for 15 minutes.

[0040] The fifth and sixth steps are the same as in Example 1.

[0041] Through the above preparation process, the conversion efficiency of the obtained organic solar cell is 2.71%. I-V curve such as Figure 4 shown.

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Abstract

The invention discloses an annealed free organic solar cell and a production method thereof. The organic solar cell comprises a substrate cathode, an electron transport layer, an organic light absorbing layer, a hole transport layer and an anode electrode. The electron transport layer is a double-layer electron transport layer composed of zinc oxide covered by polyethylenimine ethoxylated (PEIE). According to the annealed free organic solar cell and the production method thereof, the double-layer composed of zinc oxide covered by PEIE is used as the electron transport layer for producing the efficient annealed free organic solar cell, the conversion efficiency of the annealed free organic solar cell is higher than that of a cell with a single layer composed of zinc oxide and PEIE serving as a electron transport layer, the transfer efficiency of charges between an organic layer and the electron transport layer can be effectively improved, and the recombination of the charges between layers can be reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to an annealing-free organic solar cell and a preparation method thereof. Background technique [0002] Due to the advantages of simple preparation, light weight, low cost and large area production, organic solar cells are favored by many researchers. Traditional organic solar cells use PEDOT:PSS as the hole transport layer, but PEDOT:PSS has the disadvantage of being acidic and corrosive to ITO, which is not conducive to the preparation of long-term stable organic solar cells. Therefore, an inverted organic solar cell is developed, and its structure is bottom-up including substrate cathode, electron modification layer, organic light-absorbing layer, hole modification layer and anode electrode. Such a structure is based on metal oxides (ZnO, TiO 2 , Al 2 o 3 ) is the electron transport layer, which improves the stability of the battery and avoids the corrosion of ITO by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42H01L51/46
CPCH10K71/12H10K30/30Y02E10/549
Inventor 宋群梁李平
Owner SOUTHWEST UNIVERSITY
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