Solution-processed thin films of thiophene mesogens with single-crystalline alignment
article
Highly ordered thin films of organic materials are receiving a great deal of attention as active layers in a new generation of plastic electronic devices, particularly in organic field-effect transistors (OFETs). Numerous organic-film preparation technologies have been tested over the past few decades. For commercial organic electronics, solution-processed, low-cost technologies such as spin-coating, inkjet printing, and screenprinting are preferred. Mostly, these methods produce thin films with moderate structural order from soluble polymers and oligomers. The relevant physical parameters (e.g., chargecarrier mobilities) of thin organic films are strongly affected by the orientation, distribution, and size of the domains and domain boundaries, and, more generally, by the degree of
structural order. The endeavor to improve molecular alignment in active organic layers has led to the implementation of high-quality organic single crystals in OFETs with optimized performance. However, recent methods for the fabrication of single-crystal devices are rather complex and inappropriate for practical applications. Therefore, suitable organic compounds and preparation methods that yield highly ordered thin films are quite essential for progress in this field. In this paper, we present highly ordered thin films of 5,5″-bis(5-hexyl-2-thienylethynyl)-2,2′:5′,2″-terthiophene (TR5-C6) prepared from solution by spin-coating and subsequent thermal treatment, and studied using X-ray diffraction (XRD)techniques.
structural order. The endeavor to improve molecular alignment in active organic layers has led to the implementation of high-quality organic single crystals in OFETs with optimized performance. However, recent methods for the fabrication of single-crystal devices are rather complex and inappropriate for practical applications. Therefore, suitable organic compounds and preparation methods that yield highly ordered thin films are quite essential for progress in this field. In this paper, we present highly ordered thin films of 5,5″-bis(5-hexyl-2-thienylethynyl)-2,2′:5′,2″-terthiophene (TR5-C6) prepared from solution by spin-coating and subsequent thermal treatment, and studied using X-ray diffraction (XRD)techniques.
TNO Identifier
239185
ISSN
09359648
Source
Advanced Materials, 18(7), pp. 896-899.
Pages
896-899
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