Thermal annealing effect on the crack development and the stability of 6,13-bis(triisopropylsilylethynyl)-pentacene field-effect transistors with a solution-processed polymer insulator

Importance of angular mismatch on anisotropic field-effect mobility in solution-processed organic thin-film transistors

“…3(b), the XRD setup for measuring the c-axis crystallinity of TIPS-pentacene film is illustrated (top), in addition to the (001) intensity as a function of the coating speed (bottom). 17 The trend is similar to that of the optical anisotropy as a function of coating speed; the film coated at 0.3 mm/s exhibited superior (001) intensity (inset). The (001) intensity of the film coated at 0.1 mm/s was lower than that of the film coated at 0.5 mm/s.…”

“…Typically, many characteristics such as a crack, grain size, film uniformity, crystallinity, molecular ordering, and environmental effects are related to mobility in OTFTs. 17,[24][25][26] The OTFTs coated at 0.3 mm/s exhibited excellent electrical performance, as compared with OTFTs prepared at other coating speeds, and the mobility of the film coated at 0.1 mm/s was higher than that of the film coated at 0.5 mm/s. Based on this trend, we attribute the high mobility to optimally tuned charge transport arising from morphological characteristics, especially high uniformity, 24 large ribbon width, 25 and few unfavorable grain boundaries.…”

“…The TIPS-pentacene-coated substrate was annealed at 60 • C for 30 min. 17,18 Finally, 50-nm Au electrodes were thermally deposited onto the OSC film at a pressure of 10 -6 Torr and a rate of 0.1 nm/s. Schematics of the cross-section of the completed OTFTs and the chemical structure of TIPS-pentacene are shown in Fig.…”

Synthesis and characterization of copper, polyimide and TIPS-pentacene layers for the development of a solution processed fibrous transistor

“…8 The main disadvantage is the poor solubility of pentacene molecules in organic solvents at room temperature 11 and therefore the more expensive high-vacuum vapour deposition is mainly used for deposition of pentacene. 12 A lot of research has been focussed on development of soluble organic semiconductors that would allow low-cost solution processing techniques. This has been achieved using permanently functionalized linearly-fused chromophores.…”

Effect of In Situ Annealing Treatment on the Mobility and Morphology of TIPS-Pentacene-Based Organic Field-Effect Transistors

“…Subsequently, Mikayelyan et al studied the effect of the substrate temperature on the structure and morphology of the vacuum-evaporated films [25]. And the thermal annealing effect on the crack development also has been investigated [26]. Although a large number of studies have focused on improving the intrinsic electrical properties of device fabrication techniques, the influence of in situ annealing treatment in the research field of spray-coated OFETs has not received much attention.…”