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Conjugated thin polymer film solar cell and method for producing same

A technology of conjugated polymers and solar cells, applied in the field of solar cells, can solve the problems of low energy conversion efficiency, achieve the effect of reducing the electron output potential barrier and increasing the short-circuit current

Inactive Publication Date: 2012-07-25
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of low energy conversion efficiency of the inverted conjugated polymer thin film solar cell in the prior art, the present invention provides a conjugated polymer thin film solar cell and its preparation method

Method used

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  • Conjugated thin polymer film solar cell and method for producing same
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  • Conjugated thin polymer film solar cell and method for producing same

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preparation example Construction

[0032] The present invention also provides a preparation method of a conjugated polymer thin film solar cell, comprising the following steps:

[0033] (1) forming a cathode layer on the substrate;

[0034] (2) vapor-depositing a compound of molybdenum trioxide-aluminum on the above-mentioned cathode layer to form a cathode interface buffer layer;

[0035] (3) On the above-mentioned cathode interface buffer layer, a blend composed of a conjugated polymer and a fullerene derivative is coated to form a photosensitive layer;

[0036] (4) An anode interface buffer layer and an anode layer are sequentially vapor-deposited on the photosensitive layer to obtain a conjugated polymer thin film solar cell.

[0037] The substrate is glass or a flexible substrate, the cathode layer is indium tin oxide (ITO), the cathode interface buffer layer is a composite of molybdenum trioxide-aluminum, and aluminum in the composite of molybdenum trioxide-aluminum The mass percentage is 25%-83%, prefera...

Embodiment 1

[0044] In an inert atmosphere glove box, 4 mg of poly[nitrogen-(1-octylnonyl)-2,7-carbazole-alternate-5,5-(4′,7′-bis-2-thienyl-2 ', 1', 3'-benzothiadiazole)] (PCDTBT) with 16 mg of [6,6]-phenyl C71 butyric acid methyl ester (PC 70 BM) was dissolved in 1 ml of o-dichlorobenzene, and stirred magnetically for 12 hours at 40° C. to obtain a mixed solution, the concentration of PCDTBT being 4 mg / ml; PC 70 The BM concentration was 16 mg / ml.

[0045] On the glass substrate, etch the indium tin oxide anode layer with a thickness of 120 nanometers into thin strips with a width of 4 mm, clean the etched thin strips of ITO glass, put them in an oven, and dry them at 120 ° C. Put the above-mentioned cathode layer into a vacuum coating machine to evacuate, when the vacuum degree reaches 4×10 -4 Evaporate 10nm cathode interface buffer layer MoO at Pascal 3 -Al, wherein the mass percentage of Al is 25%, the above with MoO 3 -The substrate of the Al cathode interface buffer layer is trans...

Embodiment 2

[0047] The device structure and preparation method of the conjugated polymer thin film solar cell are the same as in Example 1, except that the buffer layer MoO at the cathode interface 3 -In Al, the mass percentage of Al is 33%, and the structure is ITO (120nm) / MoO 3 -Al(33%, 10nm) / PCDTBT: PC 70 BM(70nm) / MoO 3 (6nm) / Al(80nm) conjugated polymer thin film solar cells. The performance parameters of the conjugated polymer thin film solar cell prepared in this embodiment under the AM 1.5G simulated sunlight with an intensity of 100 mW / cm2 are shown in Table 1, and the current-voltage characteristic curves tested under this condition are as follows figure 2 Shown in curve 4.

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Abstract

The invention provides a conjugated polymer thin-film solar cell and a method for producing the same, which belong to the technical field of solar cells, and solve the problem of the low energy conversion efficiency of the inversed conjugated thin polymer film solar cell. The solar cell comprises a substrate, a cathode layer, a cathode boundary buffer layer, a photosensitive layer which is formed by a mixture of conjugated polymer and fullerene derivative, an anode boundary buffer layer and an anode layer, which are sequentially connected with one another, wherein the cathode boundary buffer layer is a molybdenum trioxide-aluminum composite. Through controlling the mass fraction of aluminum in the MoO3-Al boundary layer, compared with a device which uses the MoO3 as the cathode boundary buffer layer, the open-circuit voltage of the device which uses the co-evaporated MoO3-Al as the cathode boundary buffer layer is increased from 0.07 volt to 0.89 volt by 11.71 times; and the energy conversion efficiency is increased from 0.15% to 6.28% by 40.87 times.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a conjugated polymer film solar cell and a preparation method thereof. Background technique [0002] Polymer thin film solar cells using conjugated polymers as electron donors and fullerene derivatives as electron acceptors have the advantages of low cost, good flexibility, light weight, and solution processability, and have become a research hotspot in this field in recent years. In 1995, G.Yu et al. proposed for the first time that a bulk heterojunction solar cell with an interpenetrating network structure composed of conjugated polymers and fullerene derivatives has attracted widespread attention due to its high exciton separation efficiency. In the past decade, the energy conversion efficiency of conjugated polymer thin film solar cells has been greatly improved by improving the molecular structure of polymer donor materials, controlling the morphology of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46
CPCY02E10/549
Inventor 谢志元刘剑吴江
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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