Thin-film organic semiconductor devices: from flexibility to ultraflexibility

Abstract

Flexible thin-film organic semiconductor devices have received wide attention due to favorable properties such as light-weight, flexibility, reproducible semiconductor resources, easy tuning of functional properties via molecular tailoring, and low cost large-area solution-procession. Among them, ultraflexible electronics, usually with minimum bending radius of less than 1 mm, are essential for the development of epidermal and bio-implanted electronics, wearable electronics, collapsible and portable electronics, three dimensional (3D) surface compliable electronics, and bionics. This review firstly gives a brief introduction of development from flexible to ultraflexible organic semiconductor electronics, and design of ultraflexible devices, then summarizes the recent advances in ultraflexible thin-film organic semiconductor devices, focusing on organic field effect transistors, organic light-emitting diodes, organic solar cells and organic memory devices.

Tuning crystal polymorphs of a π-extended tetrathiafulvalene-based cruciform molecule towards high-performance organic field-effect transistors

“…Functional organic molecules that may serve as the active components for organic electronics, such as organic field-effect transistors (OFETs), switches, or rectifiers has attracted wide interest in recent years [1][2][3][4]. Among them, tetrathiafuvalene (TTF), first discovered by Wudl et al [5] in 1970, has been seen as a promising building block for developing molecular electrical wires [6] and high performance organic semiconductors because of its unique redox-active properties, being reversibly oxidized in two one-electron steps [7][8][9][10] and having a nearly planar molecular structure and strong intermolecular π-π and S···S interactions facilitating charge transport.…”

Imperceptible Energy Harvesting Device and Biomedical Sensor based on Ultraflexible Ferroelectric Transducers and Organic Diodes

“…Ultraflexible devices are devices with a total thickness below 10 µm 25 or a minimum bend radius less than 1 mm 26 . These characteristics allow them to be wrapped around or attached to moving and complex three-dimensional surfaces.…”

Rotating magnetic field-controlled fabrication of magnetic hydrogel with spatially disk-like microstructures

“…Thus, the controllable fabrication of composite materials with the disklike micro-morphology will be favorable to both the understanding of self-assembly systems and the development of novel biomimic functional materials [26]. Moreover, the disk-like microstructure can be regarded as a contractible two-dimensional film in microscale so that some conclusions from two-dimensional film can be generalized to microdisk.…”