Electron Transporting Compound for Photoreceptor Dispersibility
Solution Overview
Problem
Existing electrophotographic photoreceptors face challenges with the compatibility of electron transporting materials, leading to reduced dispersibility and deteriorated charging performance due to polarity differences with binder resins, resulting in separation issues in single-layer type photosensitive layers.
Innovation Solution
A compound with a specific structure, represented by formula (C1), is used as an electron transporting material, offering excellent compatibility with low-polarity binder resins and enhancing dispersibility, thereby improving charging performance in electrophotographic photoreceptors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electron transporting materials with high polarity are used, then charge transporting capacity is improved, but compatibility with low-polarity binder resins deteriorates, causing separation issues
Solution Approach 1:
The patent modifies the molecular structure of electron transporting materials by introducing specific substituents (Ra1-Ra11) that adjust the polarity parameters of the material. This allows the material to maintain high charge transporting capacity while reducing polarity mismatch with low-polarity binder resins, thereby improving dispersibility and preventing separation in single-layer photosensitive layers.
Solution Approach 2:
The patent creates a composite electron transporting material that combines electron transporting moieties with specific aromatic hydrocarbon substituents. This composite structure integrates the high charge transporting capability of electron transporting materials with the low-polarity characteristics of aromatic hydrocarbons, achieving both excellent charging performance and compatibility with binder resins.
2Device complexity
If electron transporting materials are used in single-layer photosensitive layers, then device complexity is reduced, but compatibility issues arise due to polarity differences
Solution Approach 1:
The patent designs electron transporting materials that perform multiple functions simultaneously: they provide high charge transporting capacity, ensure excellent dispersibility in low-polarity binder resins, and maintain stability in single-layer structures. The specific molecular structure with Ra1-Ra11 substituents enables the material to function effectively as both charge transporter and compatibility agent in single-layer photosensitive layers.
Data Source
AI summary
A compound has a structure represented by the following formula (C1):wherein Ra1, Ra2, Ra3, Ra41, Ra42, Ra43, Ra44, Ra45, Ra5, Ra6, Ra7, Ra8, Ra9, Ra10, and Ra11 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, an aralkyl group, an aryl group, a cyano group, a halogen atom, or a group obtained by combining two or more of the above groups, and a combination of Ra1 and Ra2, Ra41 and Ra42, Ra42 and Ra43, Ra43 and Ra44, Ra44 and Ra45, Ra5 and Ra6, Ra8 and Ra9, or Ra10 and Ra11 each independently may form a ring.