Effect of Crystallization Modes in TIPS-pentacene/Insulating Polymer Blends on the Gas Sensing Properties of Organic Field-Effect Transistors
Jung Hun Lee,Jung Hun Lee,Yena Seo,Yeong Don Park,John E. Anthony,Do Hun Kwak,Jung Ah Lim,Sung-Lim Ko,Ho Won Jang,Kilwon Cho,Wi Hyoung Lee +10 more
TLDR
It is shown that when a solution processable organic semiconductor (6,13-bis(triisopropylsilylethynyl)pentacene) is blended with an insulating polymer (PS), morphological and structural characteristics of the blend films could be significantly influenced by the processing conditions like the spin coating time.Abstract:
Blending organic semiconductors with insulating polymers has been known to be an effective way to overcome the disadvantages of single-component organic semiconductors for high-performance organic field-effect transistors (OFETs). We show that when a solution processable organic semiconductor (6,13-bis(triisopropylsilylethynyl)pentacene, TIPS-pentacene) is blended with an insulating polymer (PS), morphological and structural characteristics of the blend films could be significantly influenced by the processing conditions like the spin coating time. Although vertical phase-separated structures (TIPS-pentacene-top/PS-bottom) were formed on the substrate regardless of the spin coating time, the spin time governed the growth mode of the TIPS-pentacene molecules that phase-separated and crystallized on the insulating polymer. Excess residual solvent in samples spun for a short duration induces a convective flow in the drying droplet, thereby leading to one-dimensional (1D) growth mode of TIPS-pentacene crystals. In contrast, after an appropriate spin-coating time, an optimum amount of the residual solvent in the film led to two-dimensional (2D) growth mode of TIPS-pentacene crystals. The 2D spherulites of TIPS-pentacene are extremely advantageous for improving the field-effect mobility of FETs compared to needle-like 1D structures, because of the high surface coverage of crystals with a unique continuous film structure. In addition, the porous structure observed in the 2D crystalline film allows gas molecules to easily penetrate into the channel region, thereby improving the gas sensing properties.read more
Citations
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Development of novel microsatellite marker panel in threatened tetraploid mahseer, Tor tor (Hamilton 1822) for insights into its genetic diversity and population structure
Priyanka Sah,Priyanka Sah,Sangeeta Mandal,Rajeev K. Singh,Nimisha Dutta,Ramashanker Sah,Abhinav Pathak,J.K. Srivastava,Achal Singh,Kuldeep K. Lal,Vindhya Mohindra +10 more
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Microstructural Control of Soluble Acene Crystals for Field-Effect Transistor Gas Sensors
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Hybrid diabetes disease prediction framework based on data imputation and outlier detection techniques
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Low activation energy field-effect transistors fabricated by bar-assisted meniscus shearing
Michael Berteau-Rainville,Adrián Tamayo,Tim Leydecker,Tim Leydecker,Atiye Pezeshki,Ingo Salzmann,Marta Mas-Torrent,Emanuele Orgiu +7 more
TL;DR: In this article, the authors study the temperature-dependent transport properties of OFETs with the prototypical OSC 6,13-bis (triisopropylsilylethynyl)pentacene (TIPS-pentACene) co-processed with polystyrene (PS) as the active layer.
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Four-Point Bending Testing for Mechanical Assessment of Mouse Bone Structural Properties.
TL;DR: This chapter describes central concepts of mechanical testing, describes factors that influence the mechanical behavior of bone, and describes the application of a widely used mechanical testing technique, four-point bending, to the mouse bone for characterization of its structural properties.
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