Article
Chemistry, Physical
Seonghun Jeong, Hyeonjin Yoo, Yongjoon Cho, Seong-Jun Yoon, Byoung Hoon Lee, Changduk Yang
Summary: This study introduces strong electron-rich fused-ring dithienopyran (DTP) unit into organic field-effect transistor (OFET) materials and synthesizes different types of copolymers based on it for device applications. The donor-acceptor (D-A) type copolymers show higher charge-carrier mobilities and better thermal stability compared to the donor-donor (D-D) type copolymers, attributed to enhanced crystalline features and preferential 3D-textured molecular orientation.
Article
Engineering, Electrical & Electronic
Andrey B. Pashkovskii, Sergey A. Bogdanov, Askhat K. Bakarov, Alexandr B. Grigorenko, K. S. Zhuravlev, Vladimir G. Lapin, Vladimir M. Lukashin, Ilya A. Rogachev, Evgeniy Tereshkin, Sergey Shcherbakov
Summary: In this article, a GaAs millimeter-wave pseudomorphic high-electron-mobility transistor (pHEMT) using sophisticated AlGaAs-InGaAs-GaAs heterostructure is presented, demonstrating high mobility and high density of two-dimensional electron gas. The transistor shows impressive RF characteristics with high specific output RF power.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Engineering, Electrical & Electronic
Yu-Shien Shiah, Kihyung Sim, Yuhao Shi, Katsumi Abet, Shigenori Ueda, Masato Sasase, Junghwan Kim, Hideo Hosono
Summary: This study successfully fabricated ultrastable thin-film transistors with mobilities of 70 cm(2) (V s)(-1) by understanding the origins of instability in high-mobility amorphous oxide transistors. The research identified the sensitivity of amorphous oxide semiconductors to externally introduced impurities and defects, and explained the mechanism of how carbon-monoxide-related impurities affect the stability of high-mobility indium tin zinc oxide transistors.
NATURE ELECTRONICS
(2021)
Article
Polymer Science
Saugata Roy, Md Saifuddin, Subhankar Mandal, Jasper R. Plaisier, Satyajit Hazra
Summary: Donor-acceptor (D-A) copolymers with strong intermolecular interaction-induced aggregation are preferred as active layers for optoelectronic devices due to their higher mobilities. The performance of such devices depends on the conjugation length, which can be improved by tuning pre-deposition parameters using different techniques and solvents.
Article
Nanoscience & Nanotechnology
Vinh Van Tran, Ganghoon Jeong, Eunsol Wi, Daeho Lee, Mincheol Chang
Summary: This study developed an OFET sensor based on a donor-acceptor copolymer, which exhibits high responsivity, sensitivity, and selectivity towards polar volatile organic compounds, as well as good air stability. A DPP-DTT-based OFET device with an ultrathin nanoporous structure suitable for gas sensing applications was fabricated by optimizing the film morphology. The sensor shows high responsivities and fast response and recovery times for methanol, acetone, ethanol, and isopropyl alcohol. Moreover, the device demonstrates excellent long-term air and thermal storage stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Edgar Gutierrez-Fernandez, Alberto D. Scaccabarozzi, Aniruddha Basu, Eduardo Solano, Thomas D. Anthopoulos, Jaime Martin
Summary: The study demonstrates that using the commonly used nonfullerene acceptor BTP-4F can achieve organic thin-film transistors with high electron mobility, opening up new possibilities in the field of organic electronics. Efficient charge transport is linked to highly ordered crystalline structure, providing a new approach for exploring high mu(e) organic materials.
Article
Chemistry, Applied
Zhicheng Dai, Jingshu Tian, Jianhui Li, Maning Liu, Paola Vivo, Haichang Zhang
Summary: The synthesis of conjugated materials with the ability of self-assembling and the introduction of a thymine group into the donor units of the polymer have been shown to enhance the optoelectronic properties of organic semiconductors by promoting the formation of hydrogen-bonded superstructures and increasing the intermolecular charge transfer. The resulting organic field-effect transistors demonstrated significantly improved hole mobility.
Article
Materials Science, Multidisciplinary
John Barron, Salahuddin Attar, Payal Bhattacharya, Ping Yu, Mohammed Al-Hashimi, Suchismita Guha
Summary: This study reports on the synthesis of thiazole flanked fluorinated isoindigo (IID) copolymers and demonstrates their field-effect transistor (FET) properties. By varying the FET geometries and dielectric layers, n-type transport and high electron carrier mobility are achieved. In addition, fluorination is shown to enhance the nonlinear optical properties.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Haoquan Zhang, Yongxu Hu, Xiaosong Chen, Li Yu, Yinan Huang, Zhongwu Wang, Shuguang Wang, Yunpeng Lou, Xiaonan Ma, Yajing Sun, Jie Li, Deyang Ji, Liqiang Li, Wenping Hu
Summary: This study successfully synthesized a novel organic semiconductor TFP-TT-TPA with a centrosymmetric structure through molecule design, and found that it has negligible photoresponse. The specific design facilitates the exciton quenching process, enabling the devices to work stably under sunlight.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Manish Pandey, Yuya Sugita, Jumpei Toyoda, Shohei Katao, Ryo Abe, Yongyoon Cho, Hiroaki Benten, Masakazu Nakamura
Summary: The orientational control of semiconducting polymers in floating films has advantages for device fabrication. The unidirectional floating film transfer method has been used to fabricate large-area oriented p-type semiconducting polymer films. This study reports the preparation of high-performance n-type semiconducting polymer films using this method. The solvent used for the preparation of the floating films greatly affects the degree of polymer orientation and the size of aligned nanofibers. Moreover, the introduction of an interlayer between the source/drain contacts and the semiconducting polymer film significantly improves device performance.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Analytical
Baji Shaik, Mujeeb Khan, Mohammed Rafi Shaik, Mohammed A. F. Sharaf, Doumbia Sekou, Sang-Gyeong Lee
Summary: Two A-pi-D-pi-A-based small molecules, TDPP-T and TDPP-EDOT, have been designed and synthesized, featuring diketopyrrolopyrrole as the electron acceptor and thiophene or 3,4-ethylenedioxythiophene as the electron donor. These molecules exhibit p-type mobility in organic thin film transistor devices.
Article
Chemistry, Applied
Lucia Feriancova, Dmitry O. Balakirev, Roman S. Fedorenko, Alexey V. Kuevda, Vasiliy A. Trukhanov, Eugenia A. Svidchenko, Nikolay M. Surin, Svetlana M. Peregudova, Petr V. Dmitryakov, Nikita O. Dubinets, Yuriy V. Fedorov, Martin Putala, Sergey A. Ponomarenko, Dmitry Yu. Paraschuk, Yuriy N. Luponosov
Summary: We report the synthesis of two novel series of thiophene-phenylene co-oligomers with either phenylene or perfluorinated phenylene central core and various electron-withdrawing groups (EWGs). The synthesized oligomers showed thermal stability, crystallinity, low LUMO energies (down to -3.50 eV), narrow bandgaps (down to 1.9 eV), and efficient photoluminescence in the green-deep red spectral regions both in solution and solid-state. The TPCOs with 2-ethylhexyl cyanoacetate EWG were crystallized in large-area single-crystal monolayers, demonstrating their potential as active layers in solution-processed single-layer organic light-emitting transistors.
Article
Chemistry, Multidisciplinary
Maximilian Moser, Achilleas Savva, Karl Thorley, Bryan D. Paulsen, Tania Cecilia Hidalgo, David Ohayon, Hu Chen, Alexander Giovannitti, Adam Marks, Nicola Gasparini, Andrew Wadsworth, Jonathan Rivnay, Sahika Inal, Iain McCulloch
Summary: Donor-acceptor polymers based on diketopyrrolopyrrole unit show promising OECT performance similar to all-donor polymers, representing a significant improvement to previously developed D-A copolymers. DFT simulations suggest a positive correlation between hole polaron delocalization and steady-state OECT performance, providing new insights into the design of OECT materials. It is demonstrated that polaron delocalization can be tuned at the molecular level by selecting building blocks in the polymers' conjugated backbone, paving the way for higher performing OECT polymers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Vishnu Vijay, Remya Ramakrishnan, Mahesh Hariharan
Summary: The study unveils the crucial role of interhalogen interactions in modulating intermolecular electronic couplings and charge transport directionality in a crystalline organic donor-acceptor system, providing strategies for designing organic materials with predetermined charge transport trajectories for advanced optoelectronic applications. The intricate crystalline assembly of the NIBr2OMe derivative demonstrates unique properties for both hole and electron transfer couplings.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Sanket Samal, Heejung Roh, Camille E. Cunin, Geon Gug Yang, Aristide Gumyusenge
Summary: This study investigates the performance of semiconducting polymers in electrochemical and synaptic transistors by controlling the density of polar sidechains and hybridizing ion permeability and charge mobility. The results demonstrate efficient electrochemical signal transduction and reliable synaptic plasticity achieved through controlled ion insertion and retention. Furthermore, the newly designed polymers show unprecedented thermal tolerance, a key property in the manufacturing of organic electronics.
Article
Chemistry, Multidisciplinary
Sai Shruthi Murali, Joseph K. Gallaher, Celine Janiseck, Elliot J. Tay, Isabella Wagner, Karen E. Thorn, Aleksandra Ilina, Ronnie R. Tamming, Jiayu Wang, Clement Sester, Joshua J. Sutton, Michael B. Price, Keith C. Gordon, Kai Chen, Xiaowei Zhan, Justin M. Hodgkiss, Paul A. Hume
Summary: The control over singlet and triplet exciton populations is crucial for organic semiconductor technologies. This study investigates the rate of intersystem crossing (ISC) and demonstrates the occurrence of intramolecular triplet formation in both solution and solid state. It is found that structural distortions in disordered films lead to increased spin-orbit coupling, enabling rapid ISC. The proposal also reveals the role of rotational flexibility and conformational disorder in accelerating ISC. Overall, this work sheds light on the factors affecting ISC and provides a framework for molecular control over spin states.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Marine
Honglin Huang, Jun Li, Reyu Gao, Geng Zhang, Hongwei Yang, Wang Chen, Ming Luo, Wentuo Li
Summary: This study investigates the mechanism of wellbore breathing effect (WBE) during drilling in deepwater shallow formations (DSFs). A new model is developed to simulate and describe the transient permeability induced wellbore breathing effect (PIWBE) based on the characteristics of highly porous and permeable DSFs with undeveloped fracture systems. The results show that the formation parameters and differential pressure are significant contributors to PIWBE, while the influence of mud properties is relatively weak. Optimizing solid particle size, mud properties, and adopting MPD technology can effectively reduce the strength of PIWBE.
Review
Chemistry, Multidisciplinary
Jiang-Yang Shao, Dongmei Li, Jiangjian Shi, Chuang Ma, Yousheng Wang, Xiaomin Liu, Xianyuan Jiang, Mengmeng Hao, Luozheng Zhang, Chang Liu, Yiting Jiang, Zhenhan Wang, Yu-Wu Zhong, Shengzhong Frank Liu, Yaohua Mai, Yongsheng Liu, Yixin Zhao, Zhijun Ning, Lianzhou Wang, Baomin Xu, Lei Meng, Zuqiang Bian, Ziyi Ge, Xiaowei Zhan, Jingbi You, Yongfang Li, Qingbo Meng
Summary: This review provides a summary of the recent major advances in the research of perovskite solar cells from a material science perspective. It covers topics such as different types of perovskite materials, defects, charge transport materials, counter electrodes, and interfacial materials. It also discusses the limitations and future prospects for the development of perovskite solar cells.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Peiyao Xue, Jingming Xin, Guanyu Lu, Boyu Jia, Heng Lu, Guanghao Lu, Wei Ma, Ray P. S. Han, Xiaowei Zhan
Summary: This study investigated the performance evaluation parameters of semitransparent organic solar cells (ST-OSCs), namely, the average visible transmittance (AVT) and power conversion efficiency (PCE). By reducing the donor content, light absorption in the visible region can be decreased and the AVT values of ST-OSCs can be increased. However, a lower donor content affects exciton generation, exciton dissociation, and charge transport, thereby limiting the PCEs of the cells.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Physics, Fluids & Plasmas
Wei Su, Livio Gibelli, Jun Li, Matthew K. Borg, Yonghao Zhang
Summary: A kinetic model is proposed for the nonequilibrium flow of dense gases and is validated through extensive benchmark tests. The model accurately describes the physical properties and transport coefficients of high-density gas systems, as well as the inhomogeneous density distribution near solid boundaries. The model's collision operator includes a relaxation part and an excess part to account for finite-size effects. The model demonstrates its applicability in simulating forced wave propagation in dense gases.
PHYSICAL REVIEW FLUIDS
(2023)
Review
Energy & Fuels
Jakub Mularski, Jun Li
Summary: Exploiting biomass energy is a promising option to reduce CO2 emissions due to its renewability and carbon neutrality. This review investigates the ignition characteristics of biomass dust fuels, focusing on critical fuel properties and reactor conditions that affect ignition delay and mode. It also covers biomass combustion modeling methods and their capabilities, similarities, and drawbacks in terms of ignition prediction.
Article
Geochemistry & Geophysics
Yan Xi, Jun Li, Wei Lian, Haifeng Fu, Yue Qi, Yudong Tian
Summary: Through experiments on oil shale samples obtained from Jimsar Sag in the Junggar Basin in China, it was found that increasing the thermal treatment temperature led to a continuous increase in porosity and permeability, but with different patterns. A nonlinear correlation was observed between porosity and movable fluid saturation, while permeability showed an approximately linear correlation with movable fluid saturation.
Article
Chemistry, Multidisciplinary
Runxi Wang, Saikat Datta, Jun Li, Saad F. K. Al-Afnan, Livio Gibelli, Matthew K. Borg
Summary: This study uses high-fidelity molecular dynamics simulations to investigate the adsorption of methane in organic rock samples. A kinetic sorption model is proposed based on diffusive transport inside a nanopore, and it accurately describes the adsorption kinetics. The findings provide valuable insights for simulating gas transport in mesopores and macropores of shale reservoirs.
Article
Mechanics
Duc-Vinh Le, Jun Li, Hongying Li, Lun-Sheng Pan, Ming Cheng, Xiaowu Zhang, Chang-Wei Kang, Jing Lou
Summary: In this study, the instability problem of the pseudopotential lattice Boltzmann method (LBM) at high density ratios was addressed by using average surrounding fluid properties as the virtual solid temperature. The simulation results of droplet evaporation and film boiling at high saturated temperatures showed good agreement with existing numerical and analytical solutions, respectively. The pseudopotential LBM model was also applied to simulate droplet evaporation and pool boiling at a low reduced temperature, demonstrating improved numerical stability.
Article
Engineering, Geological
Kerou Liu, Hui Zhang, Jun Li, Kuangsheng Zhang, Yangyong Ou, Yufei Chen, Xinrui Wang, Zhixiang Cai
Summary: By establishing a model, the study investigated the fracturing law of bottom-hole rock under electrohydraulic shockwave drilling (EHSD) technology. The results showed that EHSD breaks the bottom-hole rock mainly through compression and shear stress, but tensile stress failure also occurs near internal boundaries. The influence laws of electrical parameters, location parameters, and well depth on the stress wave peak value were further studied. This research can improve our understanding of how EHSD breaks bottom-hole rock during drilling and promote the application of this technology in auxiliary drilling.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Energy & Fuels
Jakub Mularski, Leo Lue, Jun Li
Summary: This paper aims to develop a robust zero-dimensional ignition model as an effective tool to quickly estimate the ignition behaviour of biomass fuels. The model is able to accurately distinguish ignition behaviours of different biomass fuels, enabling its use in wider industrial applications.
Article
Chemistry, Physical
Robert Price, Lewis MacDonald, Norman Gillies, Alasdair Day, Edward Brightman, Jun Li
Summary: This study investigates the potential of converting whisky co-products into hydrogen using a novel two-stage electrolysis process. The results show that draff and pot ale are the most suitable feedstocks for hydrogen production, while spent lees cannot be digested and electrolyzed due to their low biomass content.
FARADAY DISCUSSIONS
(2023)
Article
Energy & Fuels
Gang Lei, Liang Xue, Qinzhuo Liao, Jun Li, Yang Zhao, Xianmin Zhou, Chunhua Lu
Summary: In this study, experimental tests were conducted on 43 artificial argillaceous sandstone samples to evaluate the porosity and permeability relations under stress dependence. An analytical model was proposed to explain the experimental results. The analysis results showed that the porosity-permeability relationship in argillaceous porous media (APM) is influenced by factors such as clay volume content, effective stress, initial irreducible water saturation, rock lithology, and pore structure parameters.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Hui Zhang, Kerou Liu, Jun Li, Kuangsheng Zhang, Yangyong Ou, Zongyu Lu, Jiangang Shi, Zhixiang Cai, Yufei Chen
Summary: By studying the stepped discharge modes of cyclic electrohydraulic shockwaves, it was found that mode 7 and mode 6 performed the best in different aspects. This provides a new idea for the development of this technology and effectively promotes its field application.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Geng Zhang, Hongwei Yang, Jun Li, Gonghui Liu, Honglin Huang, Wang Chen
Summary: This paper proposes a gas-liquid-solid non-isothermal transient flow model that considers the coupling relationships between hydrate decomposition, and heat and mass transfer in multiphase flow. The model's accuracy in predicting gas void fraction, friction pressure, and wellbore temperature is validated using experimental and field data. The study investigates the influence of seawater salinity on gas-liquid-solid flow behaviors and finds that increasing seawater salinity leads to larger decomposition area and rate of hydrate in the wellbore. Additionally, increasing wellhead backpressure and lowering inlet temperature of seawater effectively control the amount of hydrate decomposed.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
