Inorganic/organic compound film photoelectric pole and preparation method thereof

A technology of composite film and photoelectrode, which is applied in the direction of photosensitive equipment, circuits, capacitors, etc., to achieve the effect of simplifying the implementation process and reducing the difficulty

Inactive Publication Date: 2009-06-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, whether it is an inorganic semiconductor thin film or an organic thin film, there is always the problem of how to precisely control the structure, morphology and thickness of the film layer during the preparation process.

Method used

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  • Inorganic/organic compound film photoelectric pole and preparation method thereof
  • Inorganic/organic compound film photoelectric pole and preparation method thereof
  • Inorganic/organic compound film photoelectric pole and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1) The substrate is cleaned and negatively charged: the substrate of a quartz glass sheet (2.5cm×2cm×1mm) is 98% concentrated sulfuric acid and 30% H 2 o 2 (Volume ratio is 3:1) After being treated in the mixed solution at 80°C for 1 hour, rinse with deionized water, dry with pure nitrogen and store in deionized water. At this time, the substrate will remain hydrophilic and negatively charged. ;

[0027] 2) Preparation of inorganic TiO with anatase crystal phase 2 Nanoparticles: Dissolve 1.25mL of tetraisopropyl titanate in 25mL of ethanol solution, then drop the mixed solution into 250mL of stirred deionized water for reaction, and prepare the final product into a suspension with a concentration of 3wt%. , while adjusting its pH value to 3 with 1M hydrochloric acid, at this time TiO 2 The surface of nanoparticles has a positive charge, and the particle size is 2-4nm;

[0028] 3) LbL self-assembly process: first soak the negatively charged and pretreated quartz glas...

Embodiment 2

[0030] 1) substrate cleaning and making it negatively charged with embodiment 1;

[0031] 2) Preparation of inorganic TiO with anatase crystal phase 2 Nanoparticle is with embodiment 1;

[0032]3) LbL self-assembly process: first soak the negatively charged and pretreated quartz glass substrate in 50mL polydiallyldimethylammonium chloride (PDAC) aqueous solution (1.0mg / mL) for 5min, Then, a layer of positively charged PDAC molecules was adsorbed on the surface of the substrate through electrostatic interaction, and then the substrate was successively placed in 50 mL of negatively charged polystyrene sodium sulfonate (PSS) solution (1.0 mg / mL) and charged with Positively charged TiO with a pH of 3 2 Soak in the nanoparticle suspension for 5 minutes each to form a layer of inorganic / organic double-layer structure. This is one cycle, and then through multiple cycles, TiO is finally prepared. 2 / Inorganic / organic multilayer films of polystyrene sulfonate sodium (PSS) molecules...

Embodiment 3

[0034] 1) Clean the substrate and make it negatively charged: the fluorine-doped tin oxide conductive glass substrate (2.5cm×1cm×2mm) is ultrasonicated for 5 minutes with deionized water, acetone, deionized water, absolute ethanol and deionized water in sequence. After cleaning, it was placed in a strong alkali mixed solution (prepared from 1gKOH, 60mL absolute ethanol and 40mL water) for ultrasonic treatment for 2min, then repeated ultrasonic cleaning with deionized water for 3 times each for 1min, dried with pure nitrogen and placed in Store in a desiccator, at which point the substrate will remain hydrophilic and negatively charged;

[0035] 2) Preparation of inorganic TiO with anatase crystal phase 2 Nanoparticles: with embodiment 1;

[0036] 3) LbL self-assembly process: Firstly, the negatively charged and pretreated fluorine-doped tin oxide conductive glass substrate was placed in 50mL polydiallyldimethylammonium chloride (PDAC) aqueous solution (1.0mg / mL ) for 5 minut...

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Abstract

The invention discloses an inorganic/organic composite film photoelectrode in the semiconductor optoelectronic technical field, and a preparation method thereof. The invention successfully adopts the LbL self-assembly technology to obtain an inorganic/organic composite film with positively charged TiO2 nano-particles, and negatively charged TPPS dye molecules or PSS; the inorganic/organic composite film greatly increases the photocurrent and optoelectronic property stability; moreover, the TiO2/TPPS or PSS composite film can also generate obvious photocurrent within the 400-450nm wavelength range of a visible region, so as to greatly improve the application range of visible light. The invention has simple process and can effectively control the structure and composition of the film layer; in addition, the invention eventually realizes the control on the optoelectronic chemical properties of the semiconductor nano-materials and has great significance on the research of optoelectronic chemical properties of the semiconductor nano-materials and the application thereof; therefore, the invention can be effectively applied to the solar energy application, photovoltaic conversion and other fields.

Description

technical field [0001] The invention relates to an inorganic / organic composite thin-film photoelectrode and a preparation method thereof in the field of semiconductor optoelectronic technology. Background technique [0002] As we all know, the research on the photoelectric conversion process of solar energy is a very important research topic in both basic theoretical research and applied research of photoelectrochemistry. A photoelectrochemical reaction cell composed of an electrolyte, that is, a PEC cell. Studies have shown that the photocurrent generation efficiency of PEC cells is closely related to the properties of the semiconductor material, surface state, and the composition and properties of the electrolyte, and the final actual photocurrent generated depends on the number of effective photogenerated charges collected on the surface of the semiconductor electrode. The charge is obtained by separation under the built-in electric field of the space charge layer at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00
Inventor 李景虹吕小军陈达张昊王庚
Owner TSINGHUA UNIV
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