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Colloidal-quantum-dot sensitized silicon-based solar battery piece and preparation method thereof

A technology of solar cells and colloidal quantum dots, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of affecting the photoelectric conversion efficiency of batteries, insufficient combination of quantum dots, low photoelectric conversion efficiency, etc., and achieve absorbance and photoelectric conversion. The effect of improving efficiency, improving photoelectric conversion efficiency, and improving photoelectric performance

Inactive Publication Date: 2013-06-26
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The photoelectric conversion efficiency of the existing colloidal quantum dot solar cells is low, and the particle size of the quantum dots is too large, and the bonding between the quantum dots is not tight enough, resulting in a large distance between the quantum dots, which affects the photoelectric conversion efficiency of the battery.

Method used

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  • Colloidal-quantum-dot sensitized silicon-based solar battery piece and preparation method thereof
  • Colloidal-quantum-dot sensitized silicon-based solar battery piece and preparation method thereof
  • Colloidal-quantum-dot sensitized silicon-based solar battery piece and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Pretreatment of silicon-based solar cells:

[0034] Dip the semi-finished monocrystalline silicon solar cell into an anhydrous ethanol solvent for ultrasonic cleaning for 20 seconds, then immerse it in double distilled water for ultrasonic cleaning for 2 minutes, and dry it;

[0035] (2) Preparation of colloidal quantum dot solution:

[0036] In the lead acetate solution that volume is 1L, concentration is 0.005mol / L, add the complexing agent 3-mercaptopropionic acid of 1.06g and the surfactant cetyltrimethylammonium bromide of 0.91g, make precursor solution; Slowly drop the amine sulfide solution with a volume of 100mL and a concentration of 0.05mol / L into the precursor solution at a rate of 20s per drop to prepare a colloidal quantum dot solution;

[0037] (3) Coating of silicon-based solar cells:

[0038] Immerse the pretreated monocrystalline silicon solar cell semi-finished product in step (1) into the colloidal quantum dot solution in step (2), dip for 30s, ...

Embodiment 2

[0045] The monocrystalline silicon solar cell semi-finished product in Example 1 was replaced with a monocrystalline silicon solar cell finished product, and other conditions were unchanged, and a colloidal quantum dot sensitized finished crystalline silicon cell sample was obtained for detection, and the detection results were as follows:

[0046] figure 2 It is the FESEM image of the finished crystalline silicon cell sensitized by colloidal quantum dots. It can be seen from the figure that the particle size of the quantum dots on the surface of the crystalline silicon cell is between 5-10nm, and the quantum dots are closely bonded.

[0047] Figure 4 It is the comparison chart of the absorption spectrum of the colloidal quantum dot sensitized finished crystalline silicon cell and the sample without sensitization, from Figure 4 It can be seen from the figure that after the sensitization of lead sulfide colloidal quantum dots, the absorbance of crystalline silicon cells is si...

Embodiment 3

[0051] (1) Pretreatment of silicon-based solar cells:

[0052] Immerse the finished polysilicon solar cells in anhydrous ethanol solvent for ultrasonic cleaning for 20 seconds, then immerse them in double distilled water for ultrasonic cleaning for 3 minutes, and dry the pretreatment of silicon-based solar cells;

[0053] (2) Preparation of colloidal quantum dot solution:

[0054] Add 0.78 g of complexing agent 2-mercaptopropionic acid to a lead acetate solution with a volume of 1 L and a concentration of 0.005 mol / L to prepare a precursor solution; prepare a solution of sodium sulfide with a volume of 100 mL and a concentration of 0.05 mol / L for 10 s Slowly drop into the precursor solution at the speed of one drop to prepare a colloidal quantum dot solution;

[0055] Step (3) and step (4) are the same as in Example 1.

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Abstract

The invention relates to the field of photoelectric nano materials and solar batteries, and particularly relates to a colloidal-quantum-dot sensitized silicon-based solar battery piece and a preparation method of the colloidal-quantum-dot sensitized silicon-based solar battery piece. Quantum dots are deposited on the surface of the silicon-based solar battery piece, and are 5-10nm in particle diameter. The preparation method comprises the following steps of: firstly adding one or two of a complexing agent or a surface active agent into metal salt solution, and preparing into precursor liquid; slowly dropping sulfur-containing solution into the precursor liquid, stirring and preparing into colloidal-quantum-dot solution; coating the colloidal-quantum-dot solution on the surface of the pretreated silicon-based solar battery piece; and finally carrying out vacuum drying on the silicon-based solar battery piece for 5-15 minutes. The colloidal-quantum-dot sensitized silicon-based solar battery piece has the advantages that the quantum dots are uniform in particle diameter and tight in combination, and have strong absorbing action to the sunlight, so that the light reflection on the surface of the battery can be reduced and the photoelectric conversion rate of the silicon-based solar battery is increased; the preparation process is simple, the operation is easy, the material is low in cost and easily available and the suitability for industrial production is achieved.

Description

technical field [0001] The invention relates to the fields of optoelectronic nanomaterials and solar cells, in particular to a colloidal quantum dot sensitized silicon-based solar cell and a preparation method thereof. Background technique [0002] Solar energy is an inexhaustible renewable energy source for human beings, and it is also a clean energy source that does not produce any environmental pollution. Among the effective utilization of solar energy, solar photovoltaic utilization is the fastest growing and most dynamic research field in recent years, and it is also one of the most watched projects. To this end, people have researched and developed solar cells. Among the many categories of solar cells, silicon-based cells are currently the photovoltaic devices with the highest conversion efficiency and the most mature technology. The theoretical conversion efficiency of crystalline silicon solar cells can reach 31%, the highest conversion efficiency reported by exper...

Claims

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Application Information

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IPC IPC(8): H01L31/0216H01L31/0232H01L31/042H01L31/18H01L31/054
CPCY02E10/52Y02P70/50
Inventor 余锡宾冯吴亮夏玉胜浦旭鑫葛岩王雅文刘洁
Owner SHANGHAI NORMAL UNIVERSITY
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