Article
Polymer Science
Jin-long Wang, Guangcheng Ouyang, Dewei Wang, Jia Li, Jianhua Yao, Wei-Shi Li, Hongxiang Li
Summary: The performance of D-A-type photocatalysts with different donor units was studied, revealing that the polycyclic aromatic unit BTT exhibits a high hydrogen evolution rate and is an excellent donor unit for high HER photocatalysts.
Article
Polymer Science
Ming Hui Chua, Sheng Heng Gerald Toh, Pin Jin Ong, Zhuang Mao Png, Qiang Zhu, Shanxin Xiong, Jianwei Xu
Summary: Conjugated polymers containing isoindigo electron acceptor groups have shown potential for electrochromic applications. By synthesizing a series of isoindigo-based conjugated polymers with different donor units, researchers have studied their electrochromic properties. The colors of the polymers in both neutral and oxidized states can be tuned through variation of the donor groups. Thieno[3,2-b]thiophene as a donor unit exhibits the highest coloration efficiency among all reported isoindigo-based electrochromic polymers. The structure-property relationships of these polymers have been investigated, providing valuable insights for the development of high-performance electrochromic polymers based on isoindigo acceptor groups.
Article
Polymer Science
Kerem Kaya, Ecem Aydan Alkan, Mustafa Yasa, Ali Suerkan, Yasemin Arslan Udum, Levent Toppare, Yusuf Yagci
Summary: Two new donor-acceptor-donor (DAD) polymers with near-infrared absorbing properties were designed and synthesized via light induced step-growth polymerization, investigating the impact of different acceptor groups on the electrochemical and optical properties. The synthesized polymers show promising features for application in various optoelectronic devices.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Physical
Ulrike Salzner
Summary: The study investigates the unknown properties of Diketopyrrolopyrrole (DPP) homopolymers, suggesting they may have significantly wider conduction bands and n-type conductivity. Comparisons with other unknown donor-acceptor systems show that DPP substitution can reduce bandwidths and decrease electron affinities.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Polymer Science
Myllena S. Pereira, Luis O. Araujo, Mikaela Daros, Bruno B. M. Torres, Douglas J. Coutinho, Andreia G. Macedo, Roberto M. Faria, Paula C. Rodrigues
Summary: This study explored two methods for fine-tuning the energy levels of conjugated copolymers by manipulating their chemical structures: incorporating heterocyclic moieties and substituting a chalcogen atom. The inclusion of thiophene significantly altered the HOMO level, resulting in enhanced planarization and increased conjugation length.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Shunqi Xu, Hanjun Sun, Matthew Addicoat, Bishnu P. Biswal, Fan He, SangWook Park, Silvia Paasch, Tao Zhang, Wenbo Sheng, Eike Brunner, Yang Hou, Marcus Richter, Xinliang Feng
Summary: The synthesis of a novel bithiophene-bridged conjugated polymer for photoelectrochemical water reduction is demonstrated, showing promising properties for efficient charge transfer. The polymer exhibits a wide light-harvesting range, suitable optical energy gap, and high photocurrent density for hydrogen evolution.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xiaoxue Lin, Qingyi Lu, Caiyu Yang, Yan Wang, Wei Zhang, Dongxu Li, Yanyu Gao, Haijun Niu, Wen Wang
Summary: Six novel donor-acceptor conjugated polymers were synthesized by the Stille coupling reaction, showing high photoluminescence quantum efficiency and low onset voltage. The colors and coloring efficiency of the polymer films change significantly with increasing voltage.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Jie Cao, Xiaoyu Luo, Shenglong Zhou, Zhixin Wu, Qi Zhao, Hua Gu, Wen Wang, Zhilin Zhang, Kaiyue Zhang, Kaiyun Li, Jingkun Xu, Ximei Liu, Baoyang Lu, Kaiwen Lin
Summary: Four novel isoindigo-thiophene D-A-D-type precursors were synthesized and electrosynthesized into corresponding hybrid polymers with favorable electrochemical and electrochromic performances. The resultant polymer combines the merits of isoindigo and polythiophene, and exhibits high stability and extraordinary electrochromic stability. The isoindigo-thiophene D-A-D-type polymers also possess high optical contrast, fast switching time, and high coloration efficiency, making them potential candidates for electrochromic materials.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Zhiqiang Cao, Sara A. Tolba, Zhaofan Li, Gage T. Mason, Yang Wang, Changwoo Do, Simon Rondeau-Gagne, Wenjie Xia, Xiaodan Gu
Summary: Tuning the optoelectronic properties of donor-acceptor conjugated polymers is important in designing organic optoelectronic devices. This study investigates the role of acceptor units and oligothiophene donor units on the energy band gaps of these polymers. The alignment of molecular orbital energy between donor and acceptor units plays a crucial role in determining the final optical bandgap of the polymers. The findings provide molecular insights into the design of D-A CPs for organic optoelectronic devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Daniela Cappello, Francis L. Buguis, Joe B. Gilroy
Summary: Molecular materials with pi-conjugated donor-acceptor and acceptor-donor-acceptor structures have versatile applications in organic photovoltaic materials, organic light-emitting diodes, and biological imaging agents. Boron-containing compounds with unique optoelectronic and redox properties are synthesized using Stille cross-coupling chemistry. The compounds exhibit reversible redox waves, solid-state emission, and aggregation-induced emission. The optical band gaps determined from experiments and density functional theory calculations support the rationalization of the observed optoelectronic properties. This study provides a foundation for incorporating these boron-containing compounds into applications that require fine-tuning of band gaps.
Article
Chemistry, Physical
Eninges Asmare, Fekadu Gashaw Hone, Wendimagegn Mammo, Tjaart P. J. Kruger, Newayemedhin A. Tegegne
Summary: In this study, three methods were used to determine the type of aggregates in a benzodithiophene-isoindigo-based copolymer. The results indicate the presence of both H-type and J-type aggregates, with H-aggregates being more dominant.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Xin Chang, Mohammad Balooch Qarai, Frank C. Spano
Summary: A vibronic exciton model was developed to explain the spectral signatures of HJ-aggregates in oligomers and polymers with donor-acceptor-donor repeat units. The model shows that single chains with enhanced intrachain order exhibit J-behavior, while positive H-promoting interchain Coulomb interactions in aggregates attenuate the vibronic ratio. The ratio formula derived previously for P3HT aggregates was shown to also apply to (DAD)(N) aggregates with slight modifications.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Kuan-Chieh Wang, Po-Shen Lin, Yan-Cheng Lin, Shih-Huang Tung, Wen-Chang Chen, Cheng-Liang Liu
Summary: This paper presents the development of thermoelectric properties in nanocomposites comprising donor-acceptor random conjugated copolymers and single-walled carbon nanotubes (SWCNTs). The composition of the conjugated polymers is manipulated to improve the dispersion of SWCNTs and enhance the thermoelectric properties. The effects of morphologies on the thermoelectric properties are systematically investigated, resulting in the identification of DPP95/SWCNT nanocomposite with the highest power factor and maximum power output. The study demonstrates the potential of utilizing this nanocomposite in wearable thermoelectric devices to efficiently harvest low-grade waste heat.
ACS APPLIED MATERIALS & INTERFACES
(2023)
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, Physical
Deniz Cakal, Elif Demir Arabaci, Erol Yildirim, Atilla Cihaner, Ahmet M. Onal
Summary: Side chains play significant roles in organic pi-conjugated materials, affecting not only solubility but also optical and electrochemical properties. This study focuses on the synthesis of new donor-acceptor-donor (D-A-D) conjugated monomers and their corresponding polymers with a side chain, fluorene, to examine the side chain effect. It is found that the TPD acceptor unit can be modified with various functional groups to maintain superior optoelectronic properties and introduce new functionalities. The Fl-appended monomers exhibit reasonable quantum yields and ambipolar character in their corresponding polymers.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Jenner H. L. Ngai, John Polena, Daniel Afzal, Xiguang Gao, Mihir Kapadia, Yuning Li
Summary: A series of donor-acceptor polymers with high temperature coefficient and good mechanical flexibility have been designed and synthesized for temperature sensing, showing promising applications in low-cost and ubiquitous fields.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zhong Ma, Zhijun Zuo, Lin Li, Yuning Li
Summary: A new strategy involving rocking-chair coordination chemistry was used to unleash the full capacity of LFP cathode material in lithium-ion batteries. By using zinc acetate-diethanolamine complex as a functional binder, the LFP electrode achieved a high capacity close to the theoretical value and excellent cycling performance.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Applied
Wuqi Li, Marwa Abd-Ellah, Haitao Liu, Xu Li, Zhaoyi Yin, Pankaj Kumar, Jinliang Wang, Yuning Li
Summary: The newly designed and synthesized PBDTTI and PBDTTIF polymers, with strong electron accepting indolin-2-one side chains, can achieve low HOMO energy levels, providing high open circuit voltage for resulting OSCs. When used as donors with a small bandgap non-fullerene acceptor ITIC, the resulting OSCs devices show promising power conversion efficiencies.
Review
Materials Science, Multidisciplinary
Bai Sun, Yuning Li
Summary: Organic electronics offer cost-effective, flexible, and lightweight solutions for a variety of applications, but face challenges with suitable power supplies. Self-rechargeable batteries have emerged as a promising solution, utilizing clean and sustainable energy sources for autonomous power generation. These batteries can power a range of electronic devices and are crucial for the advancement of organic electronic products.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Analytical
John Polena, Daniel Afzal, Jenner H. L. Ngai, Yuning Li
Summary: This article provides a timely overview of research progress in the development of temperature sensors based on organic field-effect transistors (OFETs). It introduces the working mechanism of OFETs, the fundamental theories of charge transport in organic semiconductors, and common types of OFET temperature sensors based on the sensing element. Notable advances in the development of OFET temperature sensors using small-molecule and polymer semiconductors are discussed, and the progress and challenges in this field are summarized.
Article
Chemistry, Physical
Chase L. Radford, Priyadarshani D. Mudiyanselage, Amy L. Stevens, Timothy L. Kelly
Summary: Organic solar cells are attractive for indoor and low-light applications, but face challenges such as low photocurrents and susceptibility to defects. This study introduces heteroatom-based blocking groups to enhance the efficiency of non-fullerene acceptor-based solar cells. The results highlight the importance of designing donor:acceptor systems specifically for indoor applications.
ACS ENERGY LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Bai Sun, Jenner H. L. Ngai, Guangdong Zhou, Yongzan Zhou, Yuning Li
Summary: In this study, a two-terminal memristor using organic dye AZB as the active layer was prepared, and it was found that the device can transition from a capacitive to a memristance-dominated state as the applied voltage increases, achieving logic operations in high and low resistance states.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Chengjie Li, Yingchao Zhang, Jinxiu Yuan, Jing Hu, Hairong Dong, Guofu Li, Di Chen, Yuning Li
Summary: This study develops MoSe2/N-PCNFs nanocomposites by encapsulating ultra-small few-layered MoSe2 nanosheets in N-doped porous carbon nanofibers. The optimized structure exhibits excellent electrochemical performance for PIBs, benefiting from the improved structure stability, charge transfer kinetics, and ions/electrons-transfer kinetics. This work provides new insights into the design of MoSe2 based anodes for high-performance PIBs and other advanced secondary batteries.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Chengjie Li, Xiqing Dong, Yingchao Zhang, Jing Hu, Jinxiu Yuan, Guofu Li, Di Chen, Yuning Li
Summary: Loading single atom (SA) cocatalysts onto semiconductors offers great potential for improving photocatalytic performance. In this study, a simple micro-tailoring strategy was used to cut g-C3N4 into small pieces and oligomers, allowing stable confinement of Ru SAs onto the framework. The resulting composite showed significantly enhanced photocatalytic activity for H2 evolution, achieved through metal-support interaction and directional charge transfer.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Lin Li, Zhong Ma, Yuning Li
Summary: In this work, the optimal sulfur content for the Ketjenblack EC-600 JD sulfur host was successfully determined through characterization of sulfur-KB composites with different sulfur contents using X-ray diffraction spectroscopy and thermogravimetric analysis. The lithium-sulfur battery using the SKB with the optimal sulfur content exhibited high specific capacity and stable cycling stability.
Article
Chemistry, Physical
Zhong Ma, Zhijun Zuo, Ali Vahidifar, Abbas Ghanbari, Yayun Shi, Steven Yu, Yuning Li
Summary: In this study, lithiated carboxylated nitrile butadiene rubber (XNBR-Li) was used as a functional binder for lithium sulfur batteries (LSBs) for the first time. XNBR-Li showed strong adhesion to sulfur and carbon black particles, forming a uniformly dispersed and robust sulfur cathode structure. It also demonstrated a strong ability to trap lithium polysulfides, suppressing the shuttle effect in LSBs. The use of XNBR-Li as the binder accelerated Li+ diffusion kinetics in the sulfur cathode, leading to high capacity, high rate performance, and excellent long-term cycling stability.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Multidisciplinary
Scott Flynn, John Polena, Jenner H. L. Ngai, Haitao Liu, Xu Li, Jinliang Wang, Yuning Li
Summary: In this study, the effects of side chains on the performance of HID-based pi-conjugated polymers were investigated. The results showed that the change of side chains can affect the energy level, crystallinity, and stability of the polymers. Polymers with hydrophobic alkyl side chains demonstrated better stability.
FLEXIBLE AND PRINTED ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Bai Sun, Yuanzheng Chen, Guangdong Zhou, Yongzan Zhou, Tao Guo, Shouhui Zhu, Shuangsuo Mao, Yong Zhao, Jinyou Shao, Yuning Li
Summary: Biomaterials-based electronic devices (BEDs) have advantages such as biocompatibility and biodegradability, and have promising prospects in green electronic development. However, much work is still needed before BEDs can be widely used. This research developed a novel corn starch-based BED with integrated multifunctional performance, including memristive memory, mechanical stress sensing, synaptic application, and logic operation. This device has a wide voltage operating range, high bending response current, long-term durability synaptic performance, and logic operation capability, making it suitable for flexible wearable electronics and artificial intelligence.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Merlan Nurzhanov, Avi Mathur, Yaoyao Li, Saikiran Khamgaonkar, Sung Jae Jeon, Vivek Maheshwari, Yuning Li
Summary: This study investigates the use of cyano-containing compounds as passivation agents for perovskite solar cells. The compounds effectively interact with the perovskite film, improving its crystallinity and reducing trap density. This results in a significant increase in power conversion efficiency and storage stability of the cells. Among the tested compounds, 1,3-DCB demonstrated the most effective passivation.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Kim D. Theriault, Chase L. Radford, Gowdaianapallya P. Nagabhushana, David T. Hogan, Vance E. Williams, Timothy L. Kelly, Todd C. Sutherland
Summary: The study describes a synthetic approach to achieving columnar stacked mesogens of aromatic electron donors and acceptors, which can segregate charge transport channels in films. The use of different shapes in the D-A-D arrangement limits D-A interactions and leads to an increased photocurrent generation rate compared to amorphous films.
MATERIALS ADVANCES
(2022)