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Formulation of colloidal titanium-oxide solutions composition for coating and printing methods, and improvement of the output and lifespan of organic p-i-n/n-i-p photovoltaic cells

A technology of colloidal solution and titanium oxide, applied in the direction of titanium oxide/hydroxide, photovoltaic power generation, titanium dioxide, etc., can solve problems such as instability and low efficiency, and achieve the effect of reducing production costs

Inactive Publication Date: 2014-12-24
CENT NAT DE LA RECHERCHE SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their implementation is easy as they use standard printing techniques such as roll-to-roll and ink-jet methods. The main challenges in this field are related to the low efficiency and long-term experience of these devices. temporal instability

Method used

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  • Formulation of colloidal titanium-oxide solutions composition for coating and printing methods, and improvement of the output and lifespan of organic p-i-n/n-i-p photovoltaic cells
  • Formulation of colloidal titanium-oxide solutions composition for coating and printing methods, and improvement of the output and lifespan of organic p-i-n/n-i-p photovoltaic cells
  • Formulation of colloidal titanium-oxide solutions composition for coating and printing methods, and improvement of the output and lifespan of organic p-i-n/n-i-p photovoltaic cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Example 1 : Preparation of TiOx / TiO2 colloidal solution

[0104] The synthesis of colloidal solutions is based on the precursor [Ti 8 o 12 (H 2 O) 24 ]Cl 8 ·HCl·7H 2 O converted to TiO 2 Nanoparticles. The reaction is carried out at low temperature (120° C.) in the presence of a binary mixture of solvents of propylene carbonate and water. The chosen solvent allows good dispersion of the precursor and makes the TiO 2 Nanoparticle nucleation. The use of a high dielectric constant solvent (water) allows to dissolve the precursor before the nucleation stage. Propylene carbonate (cyclic ester) provides support for TiO 2 The control of nucleation growth. During its reaction with the acid precursor of titanium oxide, the formation of 1,2-propanediol (or propanediol), the formation of 2-chloro-1-propanol occurs, accompanied by the consumption of water molecules and the release of carbon dioxide. Adjust the concentration of the reagent and the ratio of the solvent ...

Embodiment 2

[0106] Example 2 : Control the viscosity of the colloidal solution of titanium dioxide

[0107] For the envisaged application, especially for ink-jet printing, the viscosity of the formulation of the colloidal solution can be precisely adjusted to obtain, for example, a viscosity of 8-15 cP at the printing temperature (the temperature of the printing nozzle is generally 20-80° C.) and at atmospheric pressure. viscosity.

[0108] Experimental conditions

[0109] From [Ti as a titanium precursor 8 o 12 (H 2 O) 24 ] Cl 8 ·HCl·7H 2 O (according to the international application WO2004 / 101436 (titanium aquo-oxo chloride, its method of preparation) submitted by CNRS; L.Brohan, H.Sutrisno, E.Puzenat, A.Rouet , H.Terrisse) described in the program, under controlled relative humidity (RH = 50% ~ 60%) by hydrolysis titanium concentration is usually 1.5M.L -1 TiOCl 2 The aqueous solution was carried out in the laboratory), and the colloidal solution was prepared from propylen...

Embodiment 3

[0134] Example 3 : Neutralization of colloidal solutions

[0135] The implementation of the printing technique requires controlling the pH of the colloid solution to prevent any corrosion of the printed modules. One of the steps of the method of the invention may be the hydrolysis of the titanium precursor in an aqueous medium, which hydrolysis leads to the formation of hydrochloric acid as follows:

[0136] [Ti 8 o 12 (H 2 O) 24 ] Cl 8 ·HCl·7H 2 O+x·H 2 O=>8TiO 2 +(27+x)H 2 O+9H + +9Cl -

[0137] However, when propylene carbonate is added and during heat treatment at 120 °C, propylene glycol derived from the reaction consumes HCl acid to produce neutral molecules: water and 2-chloro-1-propanol. The neutralization of the reaction can be followed by conductivity measurement. Figure 7 A trend is given for the conductivity of the colloidal solution when R=0.712 as a function of heat treatment time at T=120°C. The conductivity, which is directly proportional to th...

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Abstract

The invention relates to a method for preparing a colloidal nanoparticle solution, including: (a) dissolving a titanium-oxide precursor, referred to as a precursor, in one or more solvents, referred to as precursor solvents; and (b) chemically converting, preferably by means of hydrolysis, said titanium-oxide precursor and said precursor solvent into a colloidal-solution solvent so as to form titanium-oxide nanoparticles that are dispersed in the colloidal-solution solvent, said colloidal solution having a dynamic viscosity of between 4 and 54 cP at 20 DEG C and 101,325 Pa. The invention also relates to a colloidal titanium-oxide nanoparticle solution containing a dispersion of titanium-oxide nanoparticles in a solvent or system of solvents, the viscosity of which is between 4 and 54 cP, said solution being particularly obtainable according to the method of the invention, as well as to the uses thereof, in particular for preparing photovoltaic cells. The invention also relates to a method for generating power using a semiconductor prepared from said solution.

Description

technical field [0001] The present invention relates to the field of colloidal solutions containing nanoparticles of titanium oxide and their use for printing, in particular inkjet printing, in the field of electricity generation from solar radiation. [0002] The present invention relates in particular to a stable colloidal solution of titanium oxide nanoparticles for the preparation of semiconducting materials, in particular allowing to improve the lifetime and / or output of solar energy conversion devices, in particular photovoltaic devices, containing said materials. [0003] The invention relates to the preparation of the colloidal solution, the preparation of the semiconductor material, the preparation of the solar conversion device and its application. Background technique [0004] Technologies using crystalline silicon have dominated the photovoltaic conversion market for more than 30 years and currently constitute nearly 80% of photovoltaic cells sold. However, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053H01G9/20
CPCB82Y30/00C01G23/053C01P2004/62C01P2004/64C01P2006/22H01G9/2031H01G9/2059Y02E10/542Y02E10/547Y02E10/548Y02P70/50C01G23/08C01P2006/40C09D11/30H01L31/032H01L31/18
Inventor 露珂·R·罗杰·布洛汉阿尔卡迪乌什·米夏尔·卡尔平斯基米雷耶·理查德-普鲁特索立恩·贝尔松史蒂芬·圭莱瑞兹迈克尔·巴雷特杰罗姆·莫朗
Owner CENT NAT DE LA RECHERCHE SCI
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