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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Modelling and implementation of soft bio-mimetic turtle using echo state network and soft pneumatic actuators
MennaAllah Soliman,Mostafa A. Mousa,Mahmood Abdallah Saleh,Mahmoud Elsamanty,Ahmed G. Radwan +4 more
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A divide-and-conquer algorithm for quantum state preparation.
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Highly stable flexible organic field-effect transistors with Parylene-C gate dielectrics on a flexible substrate
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TL;DR: In this paper, a blend of PS and TIPS-PEN dissolved in 1,2,3,4 tetrahydronaphthalene to overcome the limitations of poly(chloro-p-xylene) is applied to top-contact-structured OFETs.
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Pathogenicity of severe fever with thrombocytopenia syndrome virus in mice regulated in type I interferon signaling
Seok-Chan Park,Jun Young Park,Jin Young Choi,Sung-Geun Lee,Seong Kug Eo,Jae-Ku Oem,Dongseob Tark,Myung-Jo You,Do-Hyeon Yu,Joon-Seok Chae,Bumseok Kim +10 more
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Journal ArticleDOI
Directing Solution-Phase Nucleation to Form Organic Semiconductor Vertical Crystal Arrays
Kai Zong,Yichen Ma,Kamran Shayan,Jack Ly,Emily Renjilian,Chunhua Hu,Stefan Strauf,Alejandro L. Briseno,Stephanie S. Lee +8 more
TL;DR: In this article, a generalizable strategy using nanoconfinement to direct the nucleation of small-molecule organic semiconductors during solution-phase deposition is presented, using a facile dip-coating process, triisopropylsilylethynyl-derivatized acene molecules were deposited onto nanoporous anodized aluminum oxide (AAO) scaffolds with average pore diameters ranging from 60 to 200 nm.
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