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Electrode pair of dyestuff sensitized Nano crystal thin film of solar cell

A technology of solar cells and sensitized nanocrystals, which is applied in the field of solar cells, can solve problems such as reducing photoelectric conversion efficiency, being susceptible to corrosion, and affecting the expansion of cell scale, so as to improve photoelectric conversion efficiency, reduce ohmic loss, and good stability Effect

Inactive Publication Date: 2005-11-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conductive glass has good stability in iodine-containing solutions, but its high resistance will affect the expansion of battery scale; and low-resistance substrates, such as metals, are easily corroded in solutions containing iodine electrolytes, and cannot use
In addition, due to the transparency of the conductive glass, part of the light passes through the battery and cannot be effectively absorbed, thereby reducing the photoelectric conversion efficiency.

Method used

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  • Electrode pair of dyestuff sensitized Nano crystal thin film of solar cell
  • Electrode pair of dyestuff sensitized Nano crystal thin film of solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Use fluorine-doped conductive glass (FTO) (Heilongjiang Hake New Energy Co., Ltd., sheet resistance 30Ωcm -2 ) as the substrate. On the cleaned FTO glass, use the plating solution as shown in Table 1 to uniformly plate a layer of nickel-phosphorus alloy under the conditions of pH 4-7, temperature 75-85°C and plating time 15-20min, and then at 300°C After heat treatment for 1 hour, the conductive substrate with nickel-phosphorus alloy layer of the present invention is obtained. Table 1 is the bath composition.

[0030] NiSO 4 ·6H 2 O NaPO 2 ·H 2 O H 3 BO 3 C 3 h 6 o 3 (lactic acid)

(gL -1 ) (gL -1 ) (gL -1 ) (mL L -1 )

20-30 20-30 10-20 15-25

[0031] use D 41-4 Type four-probe measuring instrument (state-operated Jianzhong Machine Factory) measures the sheet resistance of the present invention with the conductive substrate of nickel-phosphorus alloy layer, and the result is 0.5 Ω cm -2 , showin...

Embodiment 2

[0034] Use fluorine-doped conductive glass (FTO) (Heilongjiang Hake New Energy Co., Ltd., sheet resistance 30Ωcm -2 ) as the substrate. On the cleaned FTO glass, use the plating solution composed in Table 2 at pH 2-6, temperature 60-85°C and plating time 1-2 hours, current density 1A / square decimeter, duty ratio 1 / 10 A layer of nickel-phosphorus alloy is uniformly plated under the conditions, and then heat-treated at 300° C. for 1 hour to obtain the conductive substrate with the nickel-phosphorus alloy layer of the present invention. Table 2 is the composition of the chemical-electrochemical composite plating solution.

[0035] NiSO 4 ·6H 2 O NaPO 2 ·H 2 O H 3 BO 3

[0036] use D 41-4 Type four-probe measuring instrument (state-operated Jianzhong Machinery Factory) measures the sheet resistance of the present invention with the conductive substrate of the nickel-phosphorus alloy layer, and the result is 0.2 Ω cm -2 , showing that the method of the pres...

Embodiment 3

[0038] H 2 PtCl 6 Isopropanol solution was spin-coated on the conductive substrate with nickel-phosphorus alloy layer of the present invention obtained in Example 1, dried and then heat-treated at 300° C. for 15 minutes, and cooled to obtain the novel counter electrode of the present invention. Using different concentrations of H 2 PtCl 6 Virahol solution obtains the novel counter electrode of the present invention of different loaded platinum amounts, then measures its R respectively ct and platinum loading. The results are shown in Table 3, and Table 3 shows the catalytic activity of the counter electrodes of the present invention with different platinum loadings.

[0039] Platinum load (μg / cm 2 )

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Abstract

The invention is related to new type catalysis counter electrode and preparation method. The counter electrode is prepared through following steps: fixing a layer of nickel base alloy on side face of the substrate, and fixing metal layer in ultrathin on external side face of the said nickel base alloy. Nickel base alloy possesses high light reflectivity and high conductivity. Ultrathin metal layer possesses high activity of electrocatalysis for oxidation-reduction reaction of iodine. Combination of both features is able to raise light absorption efficiency of battery, lowers ohm loss and electrochemical polarization loss so as to raise photoelectric conversion efficiency. The disclosed counter electrode possesses good stability in corrosion operation environment of battery. Thus, the counter electrode is suitable to dye sensitized solar cell specially.

Description

technical field [0001] The invention relates to the technical field of solar cells, and relates to a novel catalytic counter electrode for dye-sensitized nanocrystalline thin-film solar cells and a preparation method thereof. The counter electrode comprises a layer of nickel base alloy on the base material and an ultrathin metal layer with electrocatalytic activity on the nickel base alloy layer. Background technique [0002] In dye-sensitized nanocrystalline thin film solar cells, electrons flow into the counter electrode from the external circuit and then pass through the upper I of the electrode interface. 3 - / I - The oxidation-reduction reaction enters the solution to realize the cycle work of the battery. The requirements for the counter electrode of this battery are low resistance, high catalytic activity and good stability in the electrolyte. There are currently two types of counter electrodes that can be used, platinum electrodes and platinum-loaded electrodes. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224
CPCY02E10/542
Inventor 林原王桂强林瑞峰李学萍李维盈肖绪瑞周晓文
Owner INST OF CHEM CHINESE ACAD OF SCI
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