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Flexible CdTe (Cadmium Telluride) film solar battery and preparation method thereof

A technology of solar cells and thin films, applied in circuits, electrical components, photovoltaic power generation, etc., can solve problems such as difficulty in large-area preparation, complex production process, and difficulty in stably controlling film thickness uniformity

Inactive Publication Date: 2014-05-21
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These traditional photocell fabrication methods all have the following problems: (1) It is difficult to achieve large-area preparation; (2) It is difficult to control the gradient of the composition of the compound; (3) It is difficult to stably control the uniformity of the film thickness; (4) The equipment is expensive, and High maintenance cost; (5) The production process is complicated and it is difficult to reduce the production cost

Method used

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  • Flexible CdTe (Cadmium Telluride) film solar battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Example 1 combined figure 1 The structure of the flexible CdTe / CdS thin film solar cell of the present invention is illustrated.

[0043] figure 1 Among them, 1 is a metal back electrode, 2 is a semi-metal layer, 3 is a p-type CdTe layer, 4 is an n-type CdS layer, 5 is a transparent conductive film, 6 is a metal grid electrode, and 7 is a low-resistance CdS:In layer. The metal grid electrode 6 and the metal back electrode 1 are respectively the positive and negative electrodes of the battery.

[0044] Among them, the metal back electrode 1 is a nickel foil with a thickness of 0.1-0.5 mm; the p-type CdTe layer 3 is a gradient tellurium-rich p-type CdTe layer with a thickness of about 1.5-3.5 μm; the thickness of the n-type CdS layer 4 is 0.7-1.2 μm; the transparent conductive film 5 is an indium-doped tin oxide (ITO, namely SnO2:In) film with a thickness of 0.8-1.2 μm; the low-resistance CdS:In layer 7 is formed during the preparation process, from the n-type CdS layer...

Embodiment 2

[0045] Example 2 Preparation of the flexible CdTe / CdS thin film solar cell of the present invention.

[0046] Use commercially available nickel foil with a thickness of 0.3mm and a purity of 99% (the thickness of the nickel foil can be 0.1 to 0.5mm, and the purity is not less than 98%), cut it into a size of 10.5cm×10cm, and pass through acetone and deionized in turn. After ultrasonic cleaning with water for 10 minutes, blow dry with high-purity nitrogen, and set aside; or soak the nickel foil in 3% to 6% dilute hydrochloric acid for 3 to 5 minutes to remove oxides on the surface of the nickel foil, and then wash with deionized water , dried with high-purity nitrogen, and set aside.

[0047] Analytical grade CdSO 4 (0.05M), Na 2 TeO 3 (0.005M), Na 2 SO 4 (0.2M) and NaCl (0.2M) in aqueous solution, with H 2 SO 4 Adjust the pH value to 2, then add CTAB at a ratio of 0.05g / 100mL, and stir the solution at room temperature until a uniform transparent solution without precipi...

Embodiment 3

[0052] Example 3 is an illustration of the preparation conditions of the present invention.

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Abstract

The invention discloses a flexible CdTe (Cadmium Telluride) film solar battery and a preparation method thereof, belonging to the field of a solar battery technology. The structural sequence of the battery is a metal back electrode (1), a semimetal layer (2), a p type CdTe layer (3), a n type CdS (Cadmium Sulfide) layer (4), a transparent electric film (5), a metal grid electrode (6) and a low resistance CdS: In (Indium) layer (7). The CdTe film solar battery is prepared by electrochemical deposition, the transparent electric film is deposited by selecting a deposition potential and subsequent thermal evaporation, the semimetal layer, the p type CdTe layer gradiently rich in tellurium, the n type CdS layer and an indium doped stannic oxide transparent conductive layer are respectively prepared on a nickel foil substrate, and the metal grid electrode is prepared on the surface of the transparent conductive layer by using an ion sputtering method. The film solar battery is likely to obtain raw materials, easy to operate, simple in technology, short in elapsed time and high in the stable photoelectric conversion efficiency of a battery module, thereby being applicable to manufacturing CdTe film solar batteries with large areas.

Description

technical field [0001] The invention relates to the technical field of new energy, in particular to a solar cell and a preparation method thereof. Background technique [0002] In recent years, with the development of the world economy and the growth of population, the traditional fossil energy is close to exhaustion, and the consumption of traditional fossil energy has caused a huge threat to human health and the living environment. Therefore, the human society needs more and more clean energy. getting stronger. Solar energy is a clean, non-polluting, inexhaustible and inexhaustible renewable energy that does not produce any environmental pollution. Among the effective utilization of solar energy, photovoltaic utilization of solar energy is the fastest-growing and most dynamic research field in recent years, and it is one of the most eye-catching ways of utilizing clean energy. To this end, people have developed and developed a variety of solar cells, such as silicon-base...

Claims

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Application Information

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IPC IPC(8): H01L31/073H01L31/0224H01L31/0296H01L31/18
CPCH01L31/022425H01L31/0296H01L31/073H01L31/1828Y02E10/543Y02P70/50
Inventor 杨海滨李倩周晓明迟凯麟
Owner JILIN UNIV
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