25 August 2006 Crystalline structures in organic semiconductors for high-performance OTFT applications
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We have investigated crystalline structures in organic semiconducting thin films with regioregular poly(3-alkyl thiophene)s, pentacene, and oligofluorene-thiophene derivatives, using grazing-incidence X-ray diffraction and atomic force microscopy. We found that crystalline morphologies and molecular orientation in these thin films strongly affect electric characteristics of these film-based organic thin-thin transistors (OTFTs). Specifically, in solution- and vacuumdeposited films, preferentially perpendicular orientation of π-conjugated crystalline planes with respect to dielectric substrates require results in high-performance charge mobility in the OTFT devices.
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Hoichang Yang, Hoichang Yang, Tae Joo Shin, Tae Joo Shin, Mang-Mang Ling, Mang-Mang Ling, Chang Y. Ryu, Chang Y. Ryu, Zhenan Bao, Zhenan Bao, "Crystalline structures in organic semiconductors for high-performance OTFT applications", Proc. SPIE 6336, Organic Field-Effect Transistors V, 63360B (25 August 2006); doi: 10.1117/12.679428; https://doi.org/10.1117/12.679428

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