Organic thin-film transistors (OTFTs) have lived to see great improvements in recent
years. This review presents new insight into conduction mechanisms and performance
characteristics, as well as opportunities for modeling properties of OTFTs. The shifted
focus in research from novel chemical structures to fabrication technologies that
optimize morphology and structural order is underscored by chapters on vacuum-deposited and solution-processed
organic semiconducting films. Finally, progress in the growing field of the n-type OTFTs is discussed in
ample detail. The Figure, showing a pentacene film edge on SiO2, illustrates the morphology issue.