Intermediate Layer Diarylphosphine Oxide Photosensitive Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic electrophotographic photosensitive members with intermediate layers suffer from potential fluctuations, leading to image defects like ghost phenomena, especially under varying environmental conditions of temperature and humidity, which existing methods fail to fully address without compromising sensitivity or durability.
Innovation Solution
An electrophotographic photosensitive member configuration that includes an electroconductive support, an intermediate layer containing a compound with two or more diarylphosphine oxide structures, a charge generation layer, and a charge transport layer, where the intermediate layer is composed of a resin and the compound, specifically a polyamide resin with dimer acid residues, and the charge generation material is hydroxygallium phthalocyanine crystal, optimized to minimize potential fluctuations and maintain high-quality image formation across different environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an intermediate layer is added to the electrophotographic photosensitive member, then adhesiveness and defect coverage are improved, but potential fluctuation increases causing image defects
Solution Approach 1:
The patent modifies the chemical composition parameters of the intermediate layer by incorporating specific compounds (e.g., hydroxygallium phthalocyanine crystal, polyamide resin with dimer acid residues) to alter the layer's electrical properties. This changes the charge accumulation behavior and reduces potential fluctuation while maintaining adhesiveness.
Solution Approach 2:
The intermediate layer is formulated as a composite material combining multiple components: polyamide resin with dimer acid residues, hydroxygallium phthalocyanine crystal, and other additives. This composite structure provides both adhesiveness and reduced potential fluctuation by distributing charge more evenly.
2Ease of manufacture
If conventional intermediate layer materials are used, then manufacturing is simplified, but ghost phenomenon occurs under severe environmental conditions
Solution Approach 1:
The patent specifies precise compositional parameters for the intermediate layer, including the use of polyamide resin with dimer acid residues (36-44 carbon atoms) and hydroxygallium phthalocyanine crystal with specific X-ray diffraction peaks. These parameter specifications ensure durability under severe environmental conditions while maintaining manufacturability.
Solution Approach 2:
The intermediate layer is designed with specific local properties: the polyamide resin with dimer acid residues provides structural stability and adhesion, while the hydroxygallium phthalocyanine crystal specifically addresses charge accumulation issues. This localized functional differentiation improves durability without complicating manufacturing.
3Measurement precision
If the intermediate layer composition is optimized for low humidity, then initial sensitivity is improved, but potential fluctuation increases under high humidity conditions
Solution Approach 1:
The intermediate layer composition is designed to perform multiple functions simultaneously: the polyamide resin with dimer acid residues provides both adhesion and humidity resistance, while the hydroxygallium phthalocyanine crystal maintains charge stability across varying humidity conditions. This multi-functional design ensures consistent performance without compromising initial sensitivity.
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
This configuration significantly reduces potential fluctuations, preventing image defects and maintaining high sensitivity and durability under various environmental conditions, effectively addressing the ghost phenomenon and ensuring consistent image quality.
Implementation Method 1
the intermediate layer containing a resin and a compound having two or more diarylphosphine oxide structures... significantly reduce a fluctuation in potential on the surface of the photosensitive member
Implementation Method 2
an electroconductive support, an intermediate layer, a charge generation layer containing a charge generation material, and a charge transport layer containing a charge transport material
Implementation Method 3
a charge generation layer containing a charge generation material... hydroxygallium phthalocyanine crystal
Implementation Method 4
a charge transport layer containing a charge transport material... charge transport layer containing a charge transport material
Data Source
AI summary
An electrophotographic photosensitive member includes an electroconductive support, and an intermediate layer, charge generation layer containing a charge generation material, and a charge transport layer containing a charge transport material sequentially disposed on the electroconductive support, wherein the intermediate layer contains a compound having two or more diarylphosphine oxide structures and a resin.