An Orientation-Controlled Pentacene Film Aligned by Photoaligned Polyimide for Organic Thin-Film Transistor Applications
TL;DR: In this article, the photoalignment method was used to control the structural anisotropy of pentacene films, an active semiconducting layer, in thin-film transistors.
Abstract: We have demonstrated that the photoalignment method could be used to control the structural anisotropy of pentacene films, an active semiconducting layer, in thin-film transistors (TFTs) with conspicuously anisotropic electrical characteristics. The photoaligned pentacene films were characterized with respect to structure and morphology using X-ray diffraction and atomic force microscopy. Compared to the pentacene films that are not controlled, a maximal 25-times increase in field-effect mobility (up to 0.75 cm V–1 s–1) has been achieved in the photoaligned pentacene-based TFTs by aligning pentacene orientation parallel to the direction of current flow with the help of a photoaligned polyimide layer. Mobility anisotropic ratio in the range of 2.7–8.3 for the current flow parallel and perpendicular to the alignment of the photoaligned pentacene films have been observed for photoaligned pentacene-based TFTs.
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TL;DR: In this article, the authors present stretchable and printable semiconductors and electronic circuits capable of providing good performance when stretched, compressed, flexed, or otherwise deformed.
Abstract: The present invention provides stretchable, and optionally printable, semiconductors and electronic circuits capable of providing good performance when stretched, compressed, flexed or otherwise deformed. Stretchable semiconductors and electronic circuits of the present invention preferred for some applications are flexible, in addition to being stretchable, and thus are capable of significant elongation, flexing, bending or other deformation along one or more axes. Further, stretchable semiconductors and electronic circuits of the present invention may be adapted to a wide range of device configurations to provide fully flexible electronic and optoelectronic devices.
1,673 citations
TL;DR: In this article, the authors present methods, systems and system components for transferring, assembling and integrating features and arrays of features having selected nanosized and/or microsized physical dimensions, shapes and spatial orientations.
Abstract: The present invention provides methods, systems and system components for transferring, assembling and integrating features and arrays of features having selected nanosized and/or microsized physical dimensions, shapes and spatial orientations. Methods of the present invention utilize principles of ‘soft adhesion’ to guide the transfer, assembly and/or integration of features, such as printable semiconductor elements or other components of electronic devices. Methods of the present invention are useful for transferring features from a donor substrate to the transfer surface of an elastomeric transfer device and, optionally, from the transfer surface of an elastomeric transfer device to the receiving surface of a receiving substrate. The present methods and systems provide highly efficient, registered transfer of features and arrays of features, such as printable semiconductor element, in a concerted manner that maintains the relative spatial orientations of transferred features.
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TL;DR: In this paper, a patterned layer of randomly oriented or partially aligned carbon nanotubes, such as one or more interconnected SWNT networks, is used to provide a semiconductor channel exhibiting improved electronic properties relative to conventional nanotube-based electronic systems.
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1,081 citations
TL;DR: In this paper, the kinds of polymers that are used, where and how polymer materials are used and the challenges to overcome in developing flexible displays are discussed and discussed in detail.
859 citations
Cites background from "An Orientation-Controlled Pentacene..."
...In this case, field-effect mobility was known to depend on the deposition condition of the active layer and its morphology [328]....
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Patent•
02 Jun 2005TL;DR: In this article, the authors present methods and devices for fabricating printable semiconductor elements and assembling them onto substrate surfaces, which are capable of generating a wide range of flexible electronic and optoelectronic devices and arrays of devices on polymeric materials.
Abstract: The invention provides methods and devices for fabricating printable semiconductor elements and assembling printable semiconductor elements onto substrate surfaces. Methods, devices and device components of the present invention are capable of generating a wide range of flexible electronic and optoelectronic devices and arrays of devices on substrates comprising polymeric materials. The present invention also provides stretchable semiconductor structures and stretchable electronic devices capable of good performance in stretched configurations.
558 citations