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Polymer solar battery and preparation method thereof

A solar cell and polymer technology, applied in the field of polymer solar cells, can solve problems such as difficult control of solvent gas phase pressure, influence on photoelectric conversion efficiency of devices, and damage to thin film heterojunction structures, etc., to achieve maximum operability and crystallinity improvement , contribute to the effect of mobility

Active Publication Date: 2015-07-01
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the photoelectric conversion efficiency of this polymer film solar cell is relatively low, can not meet the needs; And, chlorobenzene or dichlorobenzene are poisonous solvents, are unfavorable for environmental protection; It is difficult to control the vapor phase pressure of the solvent; in addition, the introduction of the external solvent atmosphere will make it difficult to volatilize the residual solvent inside the film, seriously destroying the heterojunction structure inside the film, and affecting the photoelectric conversion efficiency of the device; the active layer needs to be spin-coated after film formation. Into another solvent atmosphere for solvent annealing, therefore, the operation is more complicated

Method used

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  • Polymer solar battery and preparation method thereof
  • Polymer solar battery and preparation method thereof
  • Polymer solar battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1. Etching, cleaning and pretreatment of ITO glass

[0059] 1.1 Etching and processing of substrate ITO

[0060] Use insulating glue to stick the central part of 2mm×15mm on the cut 15mm×15mm regular square ITO glass, the relevant dimensions are as follows figure 2 As shown, make sure there are no air bubbles between the glass and the tape, especially around the edges. Put the pasted ITO glass into the H2 with a concentration of 37%. 2 SO 4 After about 1 minute, take out the ITO glass and wash it several times in deionized water to remove the acid remaining on the glass and complete the etching of ITO.

[0061] 1.2 Cleaning of ITO sheet

[0062] Put the numbered ITO film on the film rack, and clean the surface according to the following steps:

[0063] (1) Detergent cleaning: Use 1% micro-grade solution (Shanghai Shangbi Experimental Instrument Co., Ltd., M-9051) to ultrasonically clean for 10 minutes to wash off the inorganic and organic residues on the ITO slide...

Embodiment 2

[0090] 1. Etching, cleaning and pretreatment of FTO glass

[0091] Same as Example 1.

[0092] 2. Spin coating and annealing of tungsten trioxide

[0093] It is basically the same as Example 1, except that the spin coating speed is 3600 rpm, the thickness is about 45 nm, and the annealing conditions are: 135° C., 20 minutes.

[0094] 3. Preparation of organic photovoltaic active layer

[0095] It is basically the same as Example 1, except that the active layer uses MEH-PPV:PCBM, the solvent is chlorobenzene, the mass ratio of MEH-PPV to PCBM is 1:4, and the spin coating speed is 1200 rpm.

[0096] 4. Self-atmosphere solvent annealing treatment of organic photovoltaic active layer

[0097] Basically the same as in Example 1, the internal pressure of the container during self-atmosphere annealing is maintained at 0.01-1 MPa.

[0098] 5. Evaporation of metal electrodes

[0099] Same as Example 1.

[0100] 6. Heat treatment annealing

[0101] The heat treatment condition is...

Embodiment 3

[0106] 1. Etching, cleaning and pretreatment of ITO glass

[0107] Same as Example 1.

[0108] 2. Spin coating and annealing of cuprous oxide

[0109] It is basically the same as Example 1, except that the spin coating speed is 4100 rpm, the thickness is about 38 nanometers, and the annealing conditions are: 145° C., 10 minutes.

[0110] 3. Preparation of organic photovoltaic active layer

[0111] It is basically the same as Example 1, except that the active layer uses MDMO-PPV:PCBM, the solvent is xylene, the mass ratio of MDMO-PPV to PCBM is 1:2, and the spin coating speed is 500 rpm.

[0112] 4. Self-atmosphere solvent annealing treatment of organic photovoltaic active layer

[0113] Basically the same as in Example 1, the internal pressure of the container during self-atmosphere annealing is maintained at 0.01-1 MPa.

[0114] 5. Evaporation of metal electrodes

[0115] Same as Example 1.

[0116] 6. Heat treatment annealing

[0117] The heat treatment condition is 1...

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Abstract

The invention relates to a post-processing method capable of remarkably improving the photoelectrical conversion efficiency of a polymer solar battery. According to the method, by adopting the method of self-atmosphere dissolvent annealing and high-temperature annealing, the photoelectrical conversion efficiency of the polymer solar battery can be greatly improved. The experimental result finds that by the adoption of the method, the efficiency of the polymer solar battery can be improved to above three times that of the polymer solar battery not subjected to annealing treatment, and the efficiency is the highest reported conversion efficiency of the material so far. According to the method, a complex annealing process after inletting dissolvent and air can be omitted, the process is simplified, great operability in the production and practice can be realized, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of polymer solar cells, in particular, the invention relates to a polymer solar cell and a preparation method thereof. Background technique [0002] With the gradual depletion of fossil energy (oil, coal, natural gas, etc.), it is one of the global research hotspots to find green and renewable energy that can replace fossil energy. In recent years, research on the development and utilization of solar energy has been particularly rapid. Photovoltaic solar cells refer to devices that use the photovoltaic effect to directly convert solar energy into electrical energy. Organic Photovoltaic (OPV), especially Polymer Solar Cell (PSC), has attracted more and more researchers due to its advantages of cheapness, light weight, flexibility, easy processing, and large-area preparation. s concern. [0003] In 1992, Heeger discovered the rapid transfer process of photoinduced charges from polymers as electron donors (Donor or D)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/48
CPCY02E10/549Y02P70/50
Inventor 李灯华闫晗杨延莲王琛
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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