Undercoat Layer Composition for Photoreceptor Stability
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Solution Overview
Problem
The long-term cyclic stability of electrostatographic imaging members with typical zinc oxide/hydroxyanthraqinone undercoat layers is marginal, necessitating an improvement in photoreceptor performance.
Innovation Solution
A photoreceptor structure incorporating a conductive substrate with an undercoat layer composed of a binder resin, metal oxide particles, and compounds such as hydroxyquinoline, aminoquinoline, or quinoline acid, which supports a photosensitive layer, charge generation layer, and charge transport layer, enhancing the stability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a typical zinc oxide/hydroxyanthraqinone undercoat layer is used, then the undercoat layer can be easily manufactured, but the long-term cyclic stability of the imaging member is marginal
Solution Approach 1:
The patent changes the chemical composition parameters of the undercoat layer by replacing hydroxyanthraqinone with hydroxyquinoline, aminoquinoline, or quinoline acid compounds. This parameter change in the chemical structure improves the long-term cyclic stability while maintaining the ease of manufacture through conventional coating processes.
Solution Approach 2:
The patent creates a composite undercoat layer material combining metal oxide particles (zinc oxide, titanium oxide, or silicon oxide) with binder resin and quinoline-based compounds. This composite structure achieves both improved reliability through enhanced charge transfer properties and maintains manufacturability through standard coating techniques.
2Reliability
If the undercoat layer composition is changed to improve stability, then the cyclic stability improves, but the device complexity increases
Solution Approach 1:
The patent modifies the chemical composition parameters within the same functional class (quinoline-based compounds) rather than introducing entirely new material systems. This approach improves cyclic stability while minimizing device complexity by maintaining compatibility with existing manufacturing and operational processes.
3Productivity
If a conventional undercoat layer is used, then the manufacturing process is simple, but the charge transfer performance is insufficient
Solution Approach 1:
The patent optimizes the chemical composition parameters of the undercoat layer by incorporating specific quinoline-based compounds with proven charge transfer capabilities. This enhances productivity through improved charge transfer performance while maintaining relatively simple manufacturing processes using conventional coating methods.
Solution Approach 2:
The patent develops a composite undercoat layer combining metal oxide particles, binder resin, and quinoline-based compounds to achieve superior charge transfer performance. The composite structure improves productivity while the use of standard coating techniques keeps the manufacturing process complexity manageable.
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 proposed structure improves the cyclic stability and performance of the photoreceptor by utilizing a specific undercoat layer composition that enhances charge transfer and image formation processes, leading to improved reliability and efficiency in electrostatographic devices.
Implementation Method 1
The undercoat layer includes a binder resin, metal oxide particles, and a compound selected from the group consisting of: a hydroxyquinoline, an aminoquinoline and a quinoline acid
Data Source
AI summary
Described herein is a photoreceptor. The photoreceptor includes a conductive substrate and an undercoat layer disposed on the conductive substrate. The undercoat layer includes a binder resin, metal oxide particles, and a compound selected from the group consisting of: a hydroxyquinoline, an aminoquinoline and a quinoline acid. The photoreceptor include a photosensitive layer disposed on the undercoat layer.