Phthalocyanine Nanostructures for Wet-Process Organic Semiconductors
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Solution Overview
Problem
The challenge is to develop a low-cost method for manufacturing organic semiconductor materials suitable for electronic elements that are flexible, lightweight, and have high performance, as existing methods using phthalocyanines face difficulties due to low solvent solubility and inadequate control over molecular arrangement and crystal structure.
Innovation Solution
A phthalocyanine nano-sized substance is created with a specific composition and structure, including unsubstituted and substituted phthalocyanine derivatives, which enhances solvent dispersibility and allows for a wet process, enabling the formation of a semiconductor layer on flexible substrates with improved charge mobility and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If phthalocyanines are used as organic semiconductors to manufacture electronic elements by wet process, then cost is reduced and flexibility is improved, but solvent solubility is insufficient making the process difficult
Solution Approach 1:
The patent changes the physical-chemical parameters of phthalocyanine by controlling particle size to nano-scale (500 nm or less in minor axis) and creating specific crystal structures (one-dimensional crystalline structure). This parameter change enables the material to be processed by wet methods while maintaining semiconductor properties, resolving the contradiction between manufacturability and solubility.
2Quantity of substance
If solubilizing substituent is introduced into phthalocyanines to enhance solvent solubility, then wet process becomes possible, but molecular arrangement and higher-order structure control deteriorates leading to inferior transistor characteristics
Solution Approach 1:
The patent extracts the solubilizing substituent from the molecular structure and replaces it with a physical approach (nano-sizing and crystal structure control). This extraction maintains solvent compatibility while preserving the ability to control molecular arrangement through physical parameters rather than chemical modification.
Solution Approach 2:
Instead of changing chemical structure through substituent introduction, the patent changes physical parameters (particle size to 500 nm or less, crystal structure to one-dimensional arrangement). This parameter change achieves both solubility and molecular arrangement control without the trade-off.
3Reliability
If dry process such as vacuum evaporation or sputtering is used to manufacture phthalocyanine electronic elements, then transistor characteristics are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces the mechanical/physical vapor deposition processes (vacuum evaporation, sputtering) with a wet chemical process. By substituting the manufacturing mechanism, simpler and lower-cost wet processing methods can achieve comparable transistor characteristics, reducing manufacturing complexity.
Solution Approach 2:
The patent changes the processing parameters from high-vacuum, high-energy dry processes to ambient or mild-condition wet processes. The nano-sized phthalocyanine particles with controlled crystal structure enable this parameter change while maintaining device performance, thereby reducing manufacturing complexity.
Data Source
AI summary
There is provided an organic semiconductor material with which it is possible to manufacture an electronic element by a wet process which is low cost. Furthermore, the object is to provide an organic semiconductor electronic element which is hardly broken, light in weight and inexpensive, and has high characteristic. According to the present invention, it has been found that it is possible to provide an organic semiconductor material in which performance is improved and which is suitable for a wet process by optimizing a phthalocyanine derivative which configures a phthalocyanine nano-sized substance and the completion of the present invention has been reached. Furthermore, it is possible to provide an electronic element which has high durability, is hardly broken, light in weight, inexpensive and has high characteristic by using the organic semiconductor material in an electronic element active part (a semiconductor layer).