Article
Chemistry, Physical
So Young Park, Yea Eun Hahm, Yeong Don Park
Summary: The research shows that UV exposure can improve the molecular order and crystallization of spin-cast small p-conjugated molecules, leading to enhanced charge-carrier transport in organic transistors.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
S. M. Sattari-Esfahlan, Eun-Cheol Lee, Chang-Hyun Kim
Summary: This study delves into the synergistic effects of electrode and dielectric SAMs on the behavior of solution-processed organic field-effect transistors, providing fundamental insights into chemically modified OFETs. By utilizing a self-consistent device model to robustly treat the measured electrical characteristics of the OFETs, reliable material, interface, morphology, and transport parameters are obtained and correlated to build a comprehensive understanding on trap energy and injection-transport relationship.
Article
Chemistry, Physical
Hemlata Bisht, Abhinav Pratap Singh, Satyabrata Jit, Sandeep Pokharia, Hirdyesh Mishra
Summary: The study investigated the effect of diffusion on photo-induced excitation energy transfer between two fluorescent organic semiconducting molecules in chloroform solution at different concentrations. Diffusion was found to influence the transfer rate and spectral properties of the molecules through various mechanisms.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Wei-Yang Chou, Po-Hsiang Fang, Fu-Chiao Wu, Yi-Chen Tien, Hwo-Shuenn Sheu, Horng-Long Cheng, Jrjeng Ruan
Summary: This study explored the fabrication and crystallization of low-voltage-driven organic field-effect transistors (OFETs) using an organic polymer as the active layer. Crystalline PBTTT-C-14 with excellent electrical performance was obtained through a thermal gradient system, demonstrating the importance of microstructure in determining the opto-electronic properties of polymer semiconductors.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Hemlata Bisht, Abhinav Pratap Singh, Hem Chandra Joshi, Satyabrata Jit, Hirdyesh Mishra
Summary: In this study, the electronic excitation energy transfer between two p-type fluorescent semiconductors, F8BT and TIPS-P, was investigated in a chloroform solution using fluorescence techniques. It was found that the deviation from the Förster theory at lower acceptor concentrations is a result of diffusion and energy migration, while the system follows the Förster model of resonance excitation energy transfer at higher acceptor concentrations. The appearance of rise time and its decrease with acceptor concentration confirms FRET from F8BT to TIPS-P.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Materials Science, Multidisciplinary
Moon Jong Han, Dayan Wei, Hee Seong Yun, Seong-hun Lee, Hyungju Ahn, David M. Walba, Tae Joo Shin, Dong Ki Yoon
Summary: We report a method for three-dimensional molecular orientation control of a liquid crystal organic semiconductor (LC-OSC) based on the long-range ordering characteristic of the LC material. By synthesizing LC-OSC molecules and designing a specific structure, the orientation control of LC-OSC can be achieved over a large area. Optical observation and electrical testing confirm the feasibility of this method, which is significant for the fabrication of multidirectional and multifunctional organic electronic devices.
NPG ASIA MATERIALS
(2022)
Article
Physics, Applied
Pavel Valencia-Acuna, Tika R. Kafle, Peymon Zereshki, Hartwin Peelaers, Wai-Lun Chan, Hui Zhao
Summary: In the heterostructure of 1T'-ReS2 and F8ZnPc, holes in ReS2 can efficiently transfer to F8ZnPc on a timescale shorter than 0.35 ps with a long lifetime in F8ZnPc. The lack of electron transfer confirms the feasibility of developing 2D/organic heterostructures with anisotropic electronic and optoelectronic properties.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Ying-Hsuan Liu, Afshin Dadvand, Hatem M. Titi, Ehsan Hamzehpoor, Dmitrii F. Perepichka
Summary: This study presents a series of novel halogenated BAN derivatives and investigates the influence of their solid-state structure on optoelectronic properties and electron transport in n-type OFETs.
Article
Chemistry, Organic
Simon Schundelmeier, Christina Toenshoff, Andreas Goettler, Ralf Einholz, Hartmut Schubert, Holger F. Bettinger, Bernd Speiser
Summary: 6,13-Bis(tri(isopropyl)silylethynyl)pentacene, a stable acene derivative, becomes reactive upon electrochemical oxidation, leading to a (4 + 2) cycloaddition reaction with one of the tri(isopropyl)silylethynyl substituents. The electrosynthetic dimerization of the compound provides a complex scaffold featuring an intact pentacene, an anthracene, and a phenylene unit. The electrochemical properties of the product are explained by the combined cyclic voltammetric features of the pentacene and anthracene moieties. The reaction pathway is analyzed using electroanalytical and ESR data, revealing an oxidation-cycloaddition-reduction sequence involving a distonic radical cation intermediate. The contribution of homogeneous electron transfer is found to be negligible based on the relative redox potentials.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Shohei Kumagai, Hiroyuki Ishii, Go Watanabe, Craig P. Yu, Shun Watanabe, Jun Takeya, Toshihiro Okamoto
Summary: Organic semiconductors (OSCs) have potential applications in flexible and printed electronic devices, but the practical use of Organic thin-film transistors (OTFTs) is limited by lower carrier mobilities. N-type OSCs lag behind p-type OSCs in carrier mobility due to difficulties in achieving compatibility between aggregated structures and electron affinity. Rational molecular design principles are still needed for high-end device applications.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jie Lu, Zi Wang, Di Xue, Ming Chu, Yingying Zhang, Lianlian Ji, Qi Wang, Xingyu Jiang, Yinghui Sun, Qian Miao, Bin Dong, Lizhen Huang, Lifeng Chi
Summary: In this study, a heteroepitaxy strategy was reported to fabricate highly aligned organic crystalline thin films with high charge mobility and air stability. The structured films showed excellent performance in UV light and gas detection.
ACS MATERIALS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jie Lu, Zi Wang, Di Xue, Ming Chu, Yingying Zhang, Lianlian Ji, Qi Wang, Xingyu Jiang, Yinghui Sun, Qian Miao, Bin Dong, Lizhen Huang, Lifeng Chi
Summary: An epitaxy strategy was reported for fabricating highly aligned organic crystalline thin films with high charge mobility and responsive surfaces/interfaces.
ACS MATERIALS LETTERS
(2022)
Review
Chemistry, Multidisciplinary
James W. Borchert, R. Thomas Weitz, Sabine Ludwigs, Hagen Klauk
Summary: This passage discusses the importance of reducing high contact resistance at the interfaces between organic semiconductors and source/drains to fully utilize the performance improvements in organic transistors. The control of thin-film morphology of the organic semiconductor has been the key factor in achieving low contact resistances, while other approaches like increasing charge-carrier density have played a minor role. The challenges in forming optimized interfaces with organic semiconductors and the prevalence of Fermi-level pinning are also highlighted in the discussion.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Haruka Abe, Ayumi Kawasaki, Takashi Takeda, Norihisa Hoshino, Wakana Matsuda, Shu Seki, Tomoyuki Akutagawa
Summary: The dianionic bis(propionate)-naphthalenediimide can form cation-anion salts with various metal ions, of which Na+ and K+ salts exhibit high ionic conductivities and flexible lattice modulation, while Rb+ and Cs+ salts show relatively rigid lattice structures.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Applied
Dongik Lee, Kideuk Nam, Jong-Seong Bae, Jihun Park, Mijeong Kang, Sung Heum Park, Ju Hyun Oh, Seunghun Lee
Summary: In this study, on-demand removable passivation was achieved using nanoscale paraffin layers created through a spin-coating technique. By optimizing the solution concentration and spin speed, complete surface coverage of nanoscale paraffin layers was achieved, confirming the applicability of paraffin coating as an on-demand removable passivation technique.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Materials Science, Multidisciplinary
Takeshi Yasuda, Kenji Sakamoto
ORGANIC ELECTRONICS
(2018)
Article
Chemistry, Multidisciplinary
Kirill Bulgarevich, Kenji Sakamoto, Takeo Minari, Takeshi Yasuda, Kazushi Miki, Masayuki Takeuchi
ADVANCED FUNCTIONAL MATERIALS
(2019)
Article
Physics, Applied
Takeshi Yasuda, Kenji Sakamoto
JAPANESE JOURNAL OF APPLIED PHYSICS
(2020)
Article
Nanoscience & Nanotechnology
Kirill Bulgarevich, Kenji Sakamoto, Takeshi Yasuda, Takeo Minari, Masayuki Takeuchi
ADVANCED ELECTRONIC MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Kazuo Takimiya, Kirill Bulgarevich, Mamatimin Abbas, Shingo Horiuchi, Takuya Ogaki, Kohsuke Kawabata, Abduleziz Ablat
Summary: Control and prediction of crystal structures of molecular semiconductors are challenging, but crucial for rational design of superior molecular semiconductors. Methylthiolation can effectively control the crystal structure of molecular semiconductors, with MT-pyrene showing extremely high mobility and band-like transport characteristics in SC-FET devices.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Kirill Bulgarevich, Shingo Horiuchi, Takuya Ogaki, Kazuo Takimiya
Summary: This study synthesized and characterized a series of molecular semiconductors with different crystalline structures and evaluated their transport properties by fabricating single-crystal field-effect transistors. The results showed that both the crystalline structure and molecular orbital overlap have a significant impact on the transport properties of the materials.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Kiseki Kanazawa, Kirill Bulgarevich, Kohsuke Kawabata, Kazuo Takimiya
Summary: In this study, the synthesis and characterization of a previously unexplored structure, thieno[3 '',2 '':4 ',5 ']thieno[2 ',3 '-d]thieno[2,3-b]thiophene (i4TA), and its derivatives were carried out. The i4TA framework was found to have several different features compared to the commonly used building block, 4TA. The i4TA derivatives tended to crystallize into a promising π-stacking structure for high-mobility organic semiconductors.
CHEMISTRY OF MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Qingqing Sun, Chao Ma, Weipeng Li, Xiaomeng Li, Kenji Sakamoto, Xuying Liu, Akihiro Okamoto, Takeo Minari
Summary: This study proposes a full printing process for the fabrication of field-effect-transistor (FET) biosensors, using gold nanoparticle and carbon nanotube inks, which allows for fast and simple bacterial detection. It is suitable for medical diagnosis, public hygiene, and environmental monitoring.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kirill Bulgarevich, Shingo Horiuchi, Kazuo Takimiya
Summary: The crystal structures of molecular semiconductors greatly impact their carrier-transport properties. In this study, a new computational approach was developed to simulate the crystal structures of methylchalocogenolated pyrenes, and the simulated crystal structures were used to guide the synthesis of high-performance molecular semiconductors. The results demonstrate the power of crystal-structure simulation in exploring promising molecular semiconductors.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Kenji Sakamoto, Kirill Bulgarevich, Takeshi Yasuda, Takeo Minari, Masayuki Takeuchi
Summary: The origin of intrinsic operational instability in organic field-effect transistors (OFETs) is discussed by comparing bias stress effects of OFETs with unidirectionally aligned and unaligned active layers of two different semiconducting polymers under vacuum environment. The results indicate that an increase in mobility does not necessarily lead to an increase in operational stability.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Kirill Bulgarevich, Kazuo Takimiya
Summary: Despite the importance of studying crystal structures in molecular semiconductors for carrier transport properties, there is still a lack of mature control and prediction methods. To address this issue, the researchers developed an in silico crystallization protocol for simulating brickwork crystal structures of methylchalcogenolated polycyclic aromatic hydrocarbons (PAHs). By analyzing experimental crystal structures, particularly inclined brickwork structures, the researchers expanded the simulation protocol to simulate various brickwork-related crystal structures and evaluate the relative favorability of each polymorphic candidate.
MATERIALS HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Xuying Liu, Chuan Liu, Kenji Sakamoto, Takeshi Yasuda, Pan Xiong, Lijuan Liang, Tengzhou Yang, Masayuki Kanehara, Jun Takeya, Takeo Minari
NPG ASIA MATERIALS
(2017)
