Glassy phases in organic semiconductors. Issue 2 (April 2018)

• Record Type: Journal Article
• Authors: Snyder, Chad R.; DeLongchamp, Dean M.
• Is Part Of: Current opinion in solid state & materials science. Volume 22:Issue 2(2018)
• Page Start: 41
• Page End: 48
• Publication Date: 2018-04
• Subjects: Organic semiconductor -- Amorphous glass -- Mesophase glass -- Organic thin film transistors -- Organic photovoltaics -- Paracrystallinity -- Glass transition -- Phase diagram; Materials science -- Periodicals; Solid state physics -- Periodicals; 620.11
• DOI: 10.1016/j.cossms.2018.03.001
• Languages: English
• ISSNs: 1359-0286

Abstract

Graphical abstract: Highlights: Glassy phases affect electronic properties via energetic disorder. Glass transition measurement is challenging. Order can be optimized through glassy phases. Abstract: Organic semiconductors may be processed from fluids using graphical arts printing and patterning techniques to create complex circuitry. Because organic semiconductors are weak van der Waals solids, the creation of glassy phases during processing is quite common. Because structural disorder leads to electronic disorder, it is necessary to understand these phases to optimize and control the electronic properties of these materials. Here we review the significance of glassy phases in organic semiconductors. We examine challenges in the measurement of the glass transition temperature and the accurate classification of phases in these relatively rigid materials. Device implications of glassy phases are discussed. Processing schemes that are grounded in the principles of glass physics and sound glass transition temperature measurement will more quickly achieve desired structure and electronic characteristics, accelerating the exciting progress of organic semiconductor technology development.