Microstructural control over soluble pentacene deposited by capillary pen printing for organic electronics

Area of Science:

• Materials Science
• Organic Electronics
• Printing Technology

Background:

• Organic electronics offer cost-efficient alternatives to traditional electronics.
• Developing scalable and high-performance printing techniques is crucial for commercialization.
• Controlling the self-organization of organic semiconductor inks is key to device performance.

Purpose of the Study:

• To develop a capillary pen printing technique for large-area organic transistor arrays.
• To investigate the self-organization behavior of soluble organic semiconductor ink.
• To optimize ink formulation and printing parameters for enhanced device performance.

Main Methods:

• Utilized a capillary pen printing technique for fabricating organic transistors.
• Employed mixed solvents (chlorobenzene and 1,2-dichlorobenzene) for 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS_PEN) ink.
• Systematically investigated the morphological and microstructural properties of printed deposits.
• Analyzed the effect of solvent ratios on transistor performance.

Main Results:

• Achieved well-optimized morphological and microstructural properties of printed TIPS_PEN deposits.
• Identified a 1:1 solvent ratio of chlorobenzene and 1,2-dichlorobenzene for optimal transistor performance.
• Demonstrated that differential solvent evaporation influences deposit morphology and crystal evolution.
• Successfully fabricated large-area transistor arrays using the capillary pen technique.

Conclusions:

• The capillary pen printing technique is efficient for fabricating large-area organic electronics.
• Controlling the microstructural evolution of printed organic semiconductors enhances device performance.
• This approach offers a viable method for commercializing cost-efficient organic electronic devices.