期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 1, 页码 117-122出版社
AMER CHEMICAL SOC
DOI: 10.1021/am201074n
关键词
triisopropylsilylethynyl pentacene (TIPS-PEN); crystallization-assisting layer; spin-coating; self-organization
资金
- National Research Foundation of Korea [20110000330, 2010-0001784]
- Ministry of Education, Science & Technology (MEST) [R31-2008-000-10059-0]
- National Research Foundation of Korea [2012-90001865, 2008-0062044, R31-2012-000-10059-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The effects of spin speed and an amorphous fluoropolymer (CYTOP)-patterned substrate on the crystalline structures and device performance of triisopropylsilylethynyl pentacene (TIPS-PEN) organic field-effect transistors (OFETs) were investigated. The crystallinity of the TIPS-PEN film was enhanced by decreasing the spin speed, because slow evaporation of the solvent provided a sufficient time for the formation of thermodynamically stable crystalline structures. In addition, the adoption of a CYTOP-patterned substrate induced the three-dimensional (3D) growth of the TIPS-PEN crystals, because the patterned substrate confined the TIPS-PEN molecules and allowed sufficient time for the self-organization of TIPS-PEN. TIPS-PEN OFETs fabricated at a spin speed of 300 rpm with a CYTOP-patterned substrate showed a field-effect mobility of 0.131 cm(2) V-1 s(-1), which is a remarkable improvement over previous spin-coated TIPS-PEN OFETs.
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