Preparation method of solar micro battery on basis of directional carbon nano tube

A solar micro-battery and carbon nanotube technology, which is applied in the manufacture of circuits, electrical components, and final products, can solve the problems of unstable contact, large contact resistance, and affecting the life of solar cells, achieving high stability and simple structure Effect

Inactive Publication Date: 2010-03-10
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In this solar cell, incomplete contact is formed between the carbon nanotube film and the metal electrode material, as well as between the carbon nanotube film and the silicon wafer, which affects the life of the solar cell; and this contact is unstable, resulting in a larger The contact resistance of the electrode reduces the collection efficiency of electrons

Method used

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  • Preparation method of solar micro battery on basis of directional carbon nano tube

Examples

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Embodiment 1

[0023] In this example, an aligned single-walled carbon nanotube film was obtained by using an alternating electric field two-dimensional electrophoresis method. The single-walled carbon nanotubes were placed in chloroform and dispersed under ultrasonic waves with a frequency of 30KHz for 2 minutes to form a stable dispersed carbon nanotube suspension.

[0024] On a silicon wafer containing a 200nm-thick silicon dioxide insulating layer, ultraviolet-visible light lithography technology is used to fabricate parallel and opposite metal Pd and Al electrode pair patterns, with a pitch of 1 μm and a relative width of 10 μm. Use metal Pd as the metal electrode with high work function and Al as the metal electrode with low work function, and apply a high-frequency sinusoidal AC voltage with a frequency of 5 MHz and a field strength of 10 V / Ω between the two electrodes. A suspension of carbon nanotubes with a concentration of 0.5 μg / mL was added dropwise on the two electrodes for dire...

Embodiment 2

[0028] In this example, an aligned single-walled carbon nanotube film was obtained by using an alternating electric field two-dimensional electrophoresis method. The single-walled carbon nanotubes were placed in isopropanol, and dispersed under ultrasonic waves with a frequency of 30KHz for 2 minutes to form a stable dispersed single-walled carbon nanotube suspension.

[0029] On a silicon wafer containing a 200nm-thick silicon dioxide insulating layer, ultraviolet-visible light lithography technology is used to fabricate parallel and opposite metal Pt and Al electrode pair patterns, with a spacing of 10 μm and a relative width of 100 μm. Between the two electrodes, apply a high-frequency sinusoidal AC voltage with a frequency of 15MHz and a field strength of 20V / μm. A suspension of single-walled carbon nanotubes with a concentration of 0.1 μg / mL was dropped on the two electrodes to cause directional deposition under the action of an alternating electric field. The deposition ...

Embodiment 3

[0033] In this example, an aligned single-walled carbon nanotube film was obtained by using an alternating electric field two-dimensional electrophoresis method. The single-walled carbon nanotubes were placed in chloroform and dispersed under ultrasonic waves with a frequency of 30 KHz for 2 minutes to form a stable dispersed single-walled carbon nanotube suspension.

[0034]On a silicon wafer containing a 500nm-thick silicon dioxide insulating layer, electron beam lithography is used to produce parallel and opposite patterns of metal Ni and Ag electrode pairs, with a spacing of 20 μm and a relative width of 200 μm. Between the two electrodes, apply a high-frequency sinusoidal AC voltage with a frequency of 5MHz and a field strength of 10V / μm. A suspension of single-walled carbon nanotubes with a concentration of 0.5 μg / mL was dropped on the two electrodes to cause directional deposition under the action of an alternating electric field. The deposition time was 40 s and the de...

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Abstract

The invention relates to a preparation method of a solar micro battery on the basis of a directional carbon nano tube in the technical field of solar batteries, comprising: dispersing the carbon nanotube into an organic solvent by ultrasound to form stably dispersed carbon nano tube suspension liquid; making two asymmetry metal electrode couple respectively with high-power function and low-powerfunction at a substrate by adopting lithography; applying alternating bias voltage to the asymmetry metal electrode couple, dripping the carbon nano tube suspension liquid on the two electrodes so asto lead the carbon nano tube to from the directional carbon nano tube between the asymmetry electrodes under the action of dimensional electrophoresis force; and adopting high-current selective burnout method or methane plasma selectivity etching method to remove metallic carbon nano tube in the directional carbon nano tube, thus obtaining the solar micro battery. The micro battery is simple in structure and high in stability for long-term use, and can generate high open circuit voltage and efficiency.

Description

technical field [0001] The invention relates to a preparation method in the technical field of solar cells, in particular to a preparation method for a solar micro-battery based on aligned carbon nanotubes. Background technique [0002] A lot of research has been done on the electronic and optoelectronic devices of carbon nanotube materials. The first-generation solar cells represented by silicon materials and the second-generation solar cells represented by thin-film technology with low photoelectric conversion efficiency. Nano-semiconductor materials, such as: one-dimensional semiconducting single-walled carbon nanotubes. The quantum size effect in the circumferential direction will cause photo-excited electrons and holes to have a large Coulomb interaction to form bound excitons. Enhanced carbon nanotubes The absorption of light; the separated energy bands have direct band gaps, which makes the photoexcitation of electrons easy without the participation of phonons, and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 陈长鑫张伟张亚非
Owner SHANGHAI JIAO TONG UNIV
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