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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Enhancement of Field-Effect Mobility by Surface-Mediated Molecular Ordering in Regioregular Polythiophene Thin Film Transistor
Do Hwan Kim,Yeongdon Park,Yunseok Jang,Hoichang Yang,Kilwon Cho,Soo-Jin Park,Taihyun Chang,Chang Y. Ryu +7 more
TL;DR: In this paper, a self-aligned regioregular poly(3-hexylthiophene) (P3HT) has been used to control the intermolecular interaction at the interface between P3HT and the insulator substrate by using self-assembled monolayers (SAMs) functionalized with various groups (NH2, NH2, OH, and CH3).
Journal ArticleDOI
Combining Machine Learning and Computational Chemistry for Predictive Insights Into Chemical Systems.
John A. Keith,Valentin Vassilev-Galindo,Bingqing Cheng,Stefan Chmiela,Michael Gastegger,Klaus-Robert Müller,Alexandre Tkatchenko +6 more
TL;DR: A critical review of noteworthy applications that demonstrate how computational chemistry and machine learning can be used together to provide insightful predictions in molecular and materials modeling, retrosyntheses, catalysis, and drug design are reviewed.
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Combining Machine Learning and Computational Chemistry for Predictive Insights Into Chemical Systems.
John A. Keith,Valentin Vassilev-Galindo,Bingqing Cheng,Stefan Chmiela,Michael Gastegger,Klaus-Robert Müller,Alexandre Tkatchenko +6 more
TL;DR: In this paper, the authors provide a review of the applications of computational chemistry and machine learning in molecular and materials modeling, retrosyntheses, catalysis, and drug design.
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ForestGEO: Understanding forest diversity and dynamics through a global observatory network
Stuart J. Davies,Iveren Abiem,Kamariah Abu Salim,Salomón Aguilar,David Allen,Alfonso Alonso,Kristina J. Anderson-Teixeira,Kristina J. Anderson-Teixeira,Ana Andrade,Gabriel Arellano,Peter S. Ashton,Patrick J. Baker,Matthew E. Baker,Jennifer L. Baltzer,Yves Basset,Pulchérie Bissiengou,Stephanie A. Bohlman,Norman A. Bourg,Warren Y. Brockelman,Sarayudh Bunyavejchewin,David F. R. P. Burslem,Min Cao,Dairon Cárdenas,Li Wan Chang,Chia-Hao Chang-Yang,Kuo-Jung Chao,Wei Chun Chao,Hazel M. Chapman,Yu Yun Chen,Ryan A. Chisholm,Chengjin Chu,George B. Chuyong,Keith Clay,Liza S. Comita,Richard Condit,Susan Cordell,H. S. Dattaraja,Alexandre Adalardo de Oliveira,Jan den Ouden,Matteo Detto,Christopher W. Dick,Xiaojun Du,Alvaro Duque,Sisira Ediriweera,Erle C. Ellis,Nestor Laurier Engone Obiang,Shameema Esufali,Corneille E. N. Ewango,Edwino S. Fernando,Edwino S. Fernando,Jonah Filip,Gunter A. Fischer,Robin B. Foster,Thomas W. Giambelluca,Christian P. Giardina,Gregory S. Gilbert,Erika Gonzalez-Akre,I. A. U. N. Gunatilleke,C.V.S. Gunatilleke,Zhanqing Hao,Billy C.H. Hau,Fangliang He,Hongwei Ni,Robert W. Howe,Stephen P. Hubbell,Andreas Huth,Faith Inman-Narahari,Akira Itoh,David Janík,Patrick A. Jansen,Patrick A. Jansen,Mingxi Jiang,Daniel J. Johnson,Andy Jones,Mamoru Kanzaki,David Kenfack,Somboon Kiratiprayoon,Kamil Král,Lauren Krizel,Suzanne Lao,Andrew J. Larson,Yide Li,Xiankun Li,Creighton M. Litton,Yu Liu,Shirong Liu,Shawn K. Y. Lum,Matthew Scott Luskin,James A. Lutz,Hong Truong Luu,Keping Ma,Jean-Remy Makana,Yadvinder Malhi,Adam R. Martin,Caly McCarthy,Sean M. McMahon,William J. McShea,Hervé Memiaghe,Xiangcheng Mi,David Mitre,Mohizah Mohamad,Logan Monks,Helene C. Muller-Landau,Paul M. Musili,Jonathan Myers,Anuttara Nathalang,Kang Min Ngo,Natalia Norden,Vojtech Novotny,Michael O'Brien,David A. Orwig,Rebecca Ostertag,Konstantinos Papathanassiou,Geoffrey G. Parker,Rolando Pérez,Ivette Perfecto,Richard P. Phillips,Nantachai Pongpattananurak,Hans Pretzsch,Haibo Ren,Glen Reynolds,Lillian Jennifer Rodriguez,Sabrina E. Russo,Lawren Sack,Weiguo Sang,Jessica Shue,Anudeep Singh,Guo Zhang M. Song,Raman Sukumar,I-Fang Sun,Hebbalalu S. Suresh,Nathan G. Swenson,Sylvester Tan,Sean C. Thomas,Duncan Thomas,Jill Thompson,Benjamin L. Turner,Amanda Uowolo,María Uriarte,Renato Valencia,John Vandermeer,Alberto Vicentini,Marco D. Visser,Tomáš Vrška,Xugao Wang,Xihua Wang,George D. Weiblen,Timothy J. S. Whitfeld,Amy Wolf,Joseph S. Wright,Han Xu,Tze Leong Yao,Sandra L. Yap,Wanhui Ye,Mingjian Yu,Minhua Zhang,Daoguang Zhu,Li Zhu,Jess K. Zimmerman,Daniel Zuleta +159 more
TL;DR: ForestGEO as discussed by the authors is a network of scientists and long-term forest dynamics plots (FDPs) spanning the Earth's major forest types, which together provide a holistic view of forest functioning.
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The promise of artificial intelligence and deep learning in PET and SPECT imaging.
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References
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Enhancement of field-effect mobility due to surface-mediated molecular ordering in regioregular polythiophene thin film transistors
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Enhancement of Field-Effect Mobility by Surface-Mediated Molecular Ordering in Regioregular Polythiophene Thin Film Transistor
Do Hwan Kim,Yeongdon Park,Yunseok Jang,Hoichang Yang,Kilwon Cho,Soo-Jin Park,Taihyun Chang,Chang Y. Ryu +7 more
TL;DR: In this paper, a self-aligned regioregular poly(3-hexylthiophene) (P3HT) has been used to control the intermolecular interaction at the interface between P3HT and the insulator substrate by using self-assembled monolayers (SAMs) functionalized with various groups (NH2, NH2, OH, and CH3).
Journal ArticleDOI
Structure and Properties of Small Molecule−Polymer Blend Semiconductors for Organic Thin Film Transistors
TL;DR: A TIPS-pentacene/PalphaMS blend active layer is prepared with superior performance characteristics (field-effect mobility, on/off ratio, and threshold voltage) over those of neat TIPS, as well as the solution-processability of technologically attractive bottom-gate/bottom-contact OTFT devices.
Journal ArticleDOI
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TL;DR: The latest advances in the use of solution processable organic semiconductor blends for organic field effect transistor (OFET) applications are reviewed in this article, where multi-component, thin film microstructure formation from solution with particular focus on phase separation and crystallisation of components.
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