Anodic Oxidation for Dense Inorganic Nanoparticle Films

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Solution Overview

Problem

Existing films made from inorganic nanoparticles suffer from defects, poor compactness, and poor uniformity due to issues like large particle spacing, poor particle arrangement, and oxygen vacancies, leading to instability and reduced luminous efficiency in photoelectric devices.

Innovation Solution

A film preparation method involving anodic oxidation of a prefabricated film containing inorganic nanoparticles to improve purity, reduce impurities, and enhance density, using a process that includes anodic oxidation treatment to fill oxygen vacancies and convert metal salts and their alkalized products into inorganic nanoparticles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If inorganic nanoparticles are used as film material, then the film can be formed with nanoparticle structure, but the film has many defects and poor compactness

Engineering Contradiction:

Improvefilm compactnessVSAvoidfilm defect rate

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The patent applies preliminary action by performing anodic oxidation treatment on a prefabricated film containing inorganic nanoparticles. This pre-treatment step converts metal salts and their alkalized products into inorganic nanoparticles in-situ, filling defects and improving compactness before the film is fully assembled into the photoelectric device. The anodic oxidation process acts as a preliminary refinement step that enhances film quality upstream in the manufacturing process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs parameter changes by utilizing anodic oxidation to alter the chemical and physical parameters of the film material. The electrochemical process changes the oxidation state of metal ions, transforms precursor compounds into nanoparticle form, and modifies the density and compactness of the film structure. This parameter transformation converts a defective nanoparticle film into a high-quality compact film suitable for photoelectric applications.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If conventional film preparation methods are used, then the process is simple, but the film has poor uniformity and large particle spacing

Engineering Contradiction:

Improveparticle arrangement uniformityVSAvoidpreparation process complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent replaces mechanical mixing and deposition methods with an electrochemical anodic oxidation process. Instead of relying on mechanical assembly of nanoparticles which leads to poor uniformity, the invention uses electrochemical fields to in-situ generate and arrange inorganic nanoparticles from metal salt precursors. This substitution of mechanical processes with electrochemical processes achieves superior particle arrangement uniformity and eliminates large particle spacing issues.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary anodic oxidation treatment process that acts as a mediator between the prefabricated film containing metal salts and the final film with uniform inorganic nanoparticles. This intermediary electrochemical process facilitates the transformation and uniform distribution of nanoparticles, serving as a bridging step that improves particle arrangement without requiring complex mechanical assembly procedures.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If inorganic nanoparticles with oxygen vacancies are used, then the film can be formed quickly, but the carrier mobility is reduced and service life is shortened

Engineering Contradiction:

Improvefilm formation speedVSAvoidcarrier mobility

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies the blessing in disguise principle by converting the harmful effect of oxygen vacancies into a beneficial process. Rather than avoiding oxygen vacancies which slow down film formation, the invention intentionally uses anodic oxidation in an oxygen-rich environment to fill oxygen vacancies in the inorganic nanoparticles. This transforms the previously harmful oxygen-deficient state into a beneficial oxygen-filled state, simultaneously improving carrier mobility and service life while maintaining efficient film formation through the electrochemical process.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The method results in a film with high purity, low impurity content, and high density, improving carrier mobility, reducing mobility differences, and enhancing the service life and transmission stability of the film.

Implementation Method 1

treating the prefabricated film with anodic oxidation to obtain a film

Methodology Applied

Scientific EffectAnodic oxidation: Anodising

Implementation Method 2

treating the prefabricated film with anodic oxidation to obtain a film, and a material of the film includes a first inorganic nanoparticle

Methodology Applied

Scientific EffectElectrochemical oxidation: Oxidation

Data Source

PatentUS20250333873A1Film, preparation method thereof and photoelectric device

Publication Date: 2025.10.30 SHENZHEN TCL HIGH TECH DEVELOPMENT CO LTD

AI summary

The present disclosure disclose a film, a preparation method thereof and a photoelectric device. A material of the film includes a first inorganic nanoparticle. The film provided by the present disclosure has few defects and high density.