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Glassy phases in organic semiconductors.

Chad R Snyder¹, Dean M DeLongchamp¹

¹Materials Science and Engineering Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA.

Current Opinion in Solid State & Materials Science

|May 9, 2022

Summary

Glassy phases are common in organic semiconductors due to their processing methods. Understanding these phases is key to controlling electronic properties and advancing organic semiconductor technology.

Keywords:

Amorphous glass Glass transition Mesophase glass Organic photovoltaics Organic semiconductor Organic thin film transistors Paracrystallinity Phase diagram

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Area of Science:

Materials Science
Condensed Matter Physics
Organic Electronics

Background:

Organic semiconductors offer potential for flexible and printable electronics.
Processing organic semiconductors from fluids can lead to the formation of glassy phases.
Structural disorder in these glassy phases directly impacts electronic properties.

Purpose of the Study:

To review the significance of glassy phases in organic semiconductors.
To discuss challenges in measuring the glass transition temperature and classifying phases.
To explore the implications of glassy phases on device performance.

Main Methods:

Literature review on glassy phases in organic semiconductors.
Analysis of challenges in phase characterization and glass transition temperature measurement.
Discussion of device implications and processing strategies.

Main Results:

Glassy phases are prevalent in organic semiconductors processed from fluids.
Accurate measurement of the glass transition temperature is challenging but crucial.
Understanding glassy phases is essential for optimizing electronic and device characteristics.

Conclusions:

Grounded processing schemes based on glass physics principles will accelerate organic semiconductor development.
Addressing challenges in phase classification and transition temperature measurement is vital.
Controlling glassy phases is key to unlocking the full potential of organic electronic devices.