Article
Chemistry, Multidisciplinary
Kodai Yamanaka, Masahiko Saito, Tsubasa Mikie, Itaru Osaka
Summary: Thiazolothiazole-based pi-conjugated polymers with ester side chains, PTzBTE and PTzBTEE, were synthesized using a new methodology with improved yield and molecular weights. Despite limited absorption range, PTzBTE showed high efficiencies in OPV cells, while PTzBTEE exhibited lower performance. Investigations into electronic properties, structural order, and morphology highlighted the structure-property-device performance relationships. OPV cells fabricated with non-halogenated solvents showed comparable efficiencies to conventional halogenated solvents.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Nanoscience & Nanotechnology
Madison Mooney, Yunfei Wang, Audithya Nyayachavadi, Song Zhang, Xiaodan Gu, Simon Rondeau-Gagne
Summary: Semiconducting polymers with galactose-containing side chains were synthesized to improve solubilities in alcohol-based solvents for greener processing. The addition of carbohydrate-containing side chains had minimal detrimental impact on the electronic properties of the polymers when processed from green solvents. Incorporating natural product-inspired side chains can enhance the processability of semiconducting polymers in environmentally friendly solvents.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Narayanaswamy Kamatham, Olzhas A. Ibraikulov, Pablo Durand, Jing Wang, Olivier Boyron, Benoit Heinrich, Thomas Heiser, Patrick Leveque, Nicolas Leclerc, Stephane Mery
Summary: This study reports the impact of functionalizing four different semiconducting polymer structures with linear siloxane-terminated side-chains, showing that the substitution of alkyl chains with siloxane chains significantly influences the properties of the polymers. The increase in pi-stacking overlap of the polymer backbones leads to enhanced charge mobility values. Additionally, different siloxane chains have distinct effects on the polymer structure.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Pablo Durand, Huiyan Zeng, Till Biskup, Vishnu Vijayakumar, Viktoriia Untilova, Celine Kiefer, Benoit Heinrich, Laurent Herrmann, Martin Brinkmann, Nicolas Leclerc
Summary: Combining side chain engineering and controlled alignment of PBTTT can produce oriented thin films with improved thermoelectric performance when doped sequentially with F(6)TCNNQ. The substitution of linear alkyl side-chains with slightly polar n-C7OC4 leads to enhanced structural order and thermo-mechanical properties. The combination of improved alignment and random orientation of intercalated F(6)TCNNQ dopants helps reach a very high charge conductivity and a record power factor in the polymer chain direction.
ADVANCED ENERGY MATERIALS
(2022)
Article
Polymer Science
Fengsheng Zhao, Ye Yuan, Yafei Ding, Yunfei Wang, Xiaohong Wang, Guobing Zhang, Xiaodan Gu, Longzhen Qiu
Summary: Compared to PTDPPTT-Si-3, PTDPPTT-Si-5 and PTDPPTT-Si-7 have longer siloxane-terminal groups, allowing for better solution processability and higher mobilities.
Article
Materials Science, Multidisciplinary
Giovanni Maria Matrone, Elizabeth Gutierrez-Meza, Alex H. Balzer, Aditi Khirbat, Artem Levitsky, Alexander B. Sieval, Gitti. L. Frey, Lee J. Richter, Carlos Silva, Natalie Stingelin
Summary: Polymer-based blend morphology in systems like organic photovoltaics typically deviates from equilibrium, impacting final device performance. By comparing different fullerenes with a specific polymer in blends, phase diagrams can provide insights into optoelectronic processes and structure-property relationships.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Polymer Science
Seongwon Yoon, Keun Jun Lee, Sungmin Park, Taehee Kim, Sang Hyuk Im, Hyungju Ahn, Hae Jung Son
Summary: Developing intrinsically self-healable semiconducting polymers is crucial for stretchable electronic devices, and BHJ films of PTO2-tm polymers blended with IT-4F achieved high power conversion efficiencies. The addition of melamine allowed the BHJ film to efficiently recover its packing structure after mechanical damage, showing improved properties compared to unfunctionalized PTO2.
Article
Nanoscience & Nanotechnology
David Ohayon, Achilleas Savva, Weiyuan Du, Bryan D. Paulsen, Ilke Uguz, Raja S. Ashraf, Jonathan Rivnay, Iain McCulloch, Sahika Inal
Summary: n-Type polymers with electron transporting properties are crucial in transducing biological events involving electron generation. Researchers have developed a new family of donor-acceptor-type polymers based on the NDI-T2 backbone, studying how side chain variations affect polymer film performance in bioelectronic devices like OECTs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Xingxing Chen, Adam Marks, Bryan D. Paulsen, Ruiheng Wu, Reem B. Rashid, Hu Chen, Maryam Alsufyani, Jonathan Rivnay, Iain McCulloch
Summary: Rigid n-type conjugated polymers bearing OEG side chains demonstrated high electron mobility and excellent performance in OECT devices, achieving among the highest levels reported to date. The metal-free aldol-condensation polymerization used for synthesis is beneficial for their application in bioelectronics.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Jianwu Tian, Zitong Liu, Changchun Wu, Wenlin Jiang, Liangliang Chen, Dandan Shi, Xisha Zhang, Guanxin Zhang, Deqing Zhang
Summary: A new design strategy involving tetra-ortho-methoxy-substituted azobenzene (mAzo) and arylazopyrazole (pAzo) in the side chains is reported for a photoresponsive semiconducting polymer with tri-stable semiconducting states. The trans-cis isomerization of mAzo and pAzo groups can modulate thin film crystallinity, leading to tri-stable semiconducting states in field-effect transistors (FETs) after sequential light irradiation. By utilizing light irradiation at three different wavelengths, the device performance can be logically controlled, and a three-value logic gate can be successfully mimicked using a single FET device.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Chenying Gao, Dandan Shi, Cheng Li, Xiaobo Yu, Xisha Zhang, Zitong Liu, Guanxin Zhang, Deqing Zhang
Summary: Introducing azide groups into conjugated polymers allows the fabrication of single component semiconducting photoresists, leading to more uniform patterned semiconductor thin films. This technology enables the formation of uniform patterns as small as 5 micrometers under mild UV irradiation conditions, without affecting inter-chain packing structures.
Article
Polymer Science
Haoyu Zhao, Jordan J. Shanahan, Stephanie Samson, Zhaofan Li, Guorong Ma, Nathaniel Prine, Luke Galuska, Yunfei Wang, Wenjie Xia, Wei You, Xiaodan Gu
Summary: The morphological stability of an organic photovoltaic device can be improved by cleaving the side chains, which raises the glass transition temperature (Tg) of the conjugated polymers. Experimental results showed that isothermal annealing with controlled side chain cleavage increased the Tg and maintained the crystalline structure. Coarse grain molecular dynamics simulations supported these findings.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Polymer Science
Yuchai Pan, Jianyao Huang, Dong Gao, Zhihui Chen, Weifeng Zhang, Gui Yu
Summary: Semiconducting polymers play a crucial role in both industrial and academic purposes, with ongoing research focusing on the structure-performance relationship. By improving structural engineering, new semiconducting polymers with enhanced properties can be developed. Through studying a series of diketopyrrolopyrrole-based polymers with different alkyl chain lengths, a strong correlation between electrical performance and alkyl side chain was observed, leading to a comprehensive understanding of design rules for high-performance semiconductor materials.
Article
Materials Science, Multidisciplinary
Rui Qiao, Haoran Xu, Shaonan Chen, Sheng Chen, Hang Luo, Dou Zhang
Summary: Dielectric polymers are crucial in modern electronic and electrical applications due to their easy processing, lightweight, and high breakdown strength. By combining different polymer advantages, the dielectric polymer blending method is a feasible option to address the issue of high ε(r) and breakdown strength in dielectric homopolymers. Experimental results showed the significant impact of n-type semiconductive polymer on the dielectric and energy storage properties of PPDI/PVTC blends.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Polymer Science
Allison R. Wong, Melissa Barrera, Arpan Pal, Jessica R. Lamb
Summary: This study reports the addition of solubilizing groups to rigid POxa, which improves their solubility and enables characterization of their key properties using solution-state methods. The understanding gained from this research expands the scope of soluble POxa and facilitates the rational design of these materials.
Article
Polymer Science
Zhiyuan Qian, Luke A. Galuska, Guorong Ma, William W. McNutt, Song Zhang, Jianguo Mei, Xiaodan Gu
Summary: Extensive efforts have been made to develop flexible electronics with intrinsically stretchable and soft conjugated polymers. The influence of conjugation break spacers (CBS) on the thermomechanical properties and crystallization behaviors of naphthalene diimide-based conjugated polymer was systematically investigated, showing significant effects on chain rigidity, melting point, glass transition temperature, crystallization kinetics, and crystal polymorphism. Increasing the length of CBS was found to increase crystallization half-time and affect crystallization rate, while crystallization also significantly influenced the mechanical response of the polymer.
JOURNAL OF POLYMER SCIENCE
(2022)
Article
Polymer Science
Mustafa Ahmed, Dung T. Tran, John Putziger, Zhifan Ke, Ashkan Abtahi, Zhiyang Wang, Ke Chen, Kai Lang, Jianguo Mei
Summary: The study successfully incorporated stable TCCp aromatic anion into PNb-based electrolytes to create PNb-TCCp with high ionic conductivity. These electrolytes, due to their stable aromatic anion groups and favorable interactions with aromatic cations, could improve the thermal stability of doped conjugated polymers.
Article
Polymer Science
Ho Joong Kim, Kuluni Perera, Zihao Liang, Brennen Bowen, Jianguo Mei, Bryan W. Boudouris
Summary: Organic electrochemical transistors (OECTs) are a promising platform for bioelectronic applications. Researchers have developed a new materials system by blending a radical polymer with a conjugated polymer, which allows for controlled modulation of the ionic transport in OECT devices. This decoupling of ion and electron transport leads to high-performance OECTs.
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.
Correction
Engineering, Electrical & Electronic
Ying-Shi Guan, Faheem Ershad, Zhoulyu Rao, Zhifan Ke, Ernesto Curty da Costa, Qian Xiang, Yuntao Lu, Xu Wang, Jianguo Mei, Peter Vanderslice, Camila Hochman-Mendez, Cunjiang Yu
NATURE ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Ying-Shi Guan, Faheem Ershad, Zhoulyu Rao, Zhifan Ke, Ernesto Curty da Costa, Qian Xiang, Yuntao Lu, Xu Wang, Jianguo Mei, Peter Vanderslice, Camila Hochman-Mendez, Cunjiang Yu
Summary: Rubbery semiconductor thin films based on a lateral-phase-separation-induced micromesh can be used to create transistors, complementary inverters, and bilayer heterojunction photodetectors that function under applied strains up to 50%.
NATURE ELECTRONICS
(2022)
Article
Multidisciplinary Sciences
Inho Song, Jaeyong Ahn, Hyungju Ahn, Sang Hyuk Lee, Jianguo Mei, Nicholas A. Kotov, Joon Hak Oh
Summary: In this study, a simple and powerful method was used to fabricate chiroptical flexible layers through supramolecular helical ordering of conjugated polymer chains. The multiscale chirality and optical activity of these layers can be varied across a broad spectral range by chiral templating. After template removal, chromophores remain in one-dimensional helical nanofibrils, producing a homogeneous chiroptical layer with drastically enhanced polarization-dependent absorbance, enabling well-resolved detection and visualization of the spin angular momentum (SAM) of photons. This study provides a scalable path towards on-chip detection of the spin degree of freedom of photons necessary for encoded quantum information processing and high-resolution polarization imaging.
Article
Optics
Ke Chen, Hang Hu, Inho Song, Habtom B. Gobeze, Won-June Lee, Ashkan Abtahi, Kirk S. Schanze, Jianguo Mei
Summary: An optoelectronic synapse is created by adding a photoactive layer to an organic electrochemical transistor, allowing it to mimic the learning process of the human brain. These synapses can perceive and memorize visual information, making them ideal for applications such as bionic eyes or vision automation.
Article
Chemistry, Multidisciplinary
Yoon Ho Lee, Jee Yung Park, Peiran Niu, Hanjun Yang, Dewei Sun, Libai Huang, Jianguo Mei, Letian Dou
Summary: A facile one-step solution process for synthesizing 2D perovskite crystal arrays through meniscus-guided coating on patterned substrates is proposed. This method is further used for the synthesis of lateral heterostructure nanoplate arrays. Six different 2D perovskite nanoplate arrays, including epitaxial heterostructures, are successfully realized. Optical and crystallographic characterizations show the high optical performance and crystallinity of the nanoplates. Moreover, this method is utilized for preparing high-performance 2D perovskite nanoplate photosensor arrays. This strategy can guide the fundamental investigation of optical properties and the development of high-performance optoelectronics of perovskite materials.
Article
Chemistry, Multidisciplinary
Heejung Roh, Shuwen Yue, Hang Hu, Ke Chen, Heather J. Kulik, Aristide Gumyusenge
Summary: Due to its low-power, fast and highly adaptive operability, as well as scalability, electrochemical random-access memory (ECRAM) technology shows great potential for neuromorphic computing based on artificial neural networks. However, there are still challenges in practical implementation, such as high write noise, asymmetric weight updates, and limited dynamic range. In this study, high-performance, single-transistor and neuromorphic devices based on electrochromic polymers (ECPs) are demonstrated, offering a promising approach for the discovery and design of novel polymer materials for organic ECRAMs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Inho Song, Liyan You, Ke Chen, Won-June Lee, Jianguo Mei
Summary: Homogeneous chiral electrochromics using chiral assembly of conjugated polymers have been developed through a transient solidification process with molecular chiral templates. The circular dichroism can be tuned by adjusting the doping level of the electrochemically active polymer films. The differential circularly polarized transmission in the chiral see-through display can make a well-resolved color change, demonstrating proof-of-concept devices for information encryption.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Organic
Mustafa Ahmed, Yukun Wu, Matthew R. Schiavone, Kai Lang, Liyan You, Matthias Zeller, Jianguo Mei
Summary: A one-pot synthetic method for the formation of core-extended N,N-disubstituted diaryldihydrophenazine (DADHP) diradical dications (DRDCs) via chemical oxidation from aryl-substituted ortho-phenyldiamine is reported. The isolated N,N-disubstituted DADHP DRDCs were reduced to their neutral counterparts using hydrazine. The unsubstituted fluorene aryl group, 2a, was tested as a photocatalyst for the atom transfer polymerization (ATRP) of methyl methacrylate, resulting in a polymer with controlled molecular weight and narrow polydispersity.
Article
Chemistry, Multidisciplinary
Geon Gug Yang, Dong-Ha Kim, Sanket Samal, Jungwoo Choi, Heejung Roh, Camille E. Cunin, Hyuck Mo Lee, Sang Ouk Kim, Mircea Dinca, Aristide Gumyusenge
Summary: We present a design for a thermally stable, mechanically compliant, and sensitive polymer-based NO2 gas sensor. The sensors exhibit stable NO2 sensing even at high temperatures and can be implemented onto flexible and heat-resistant substrates. This unprecedented sensor performance is promising for real-time monitoring of gas emission from vehicles and industrial chemical processes.
Article
Chemistry, Multidisciplinary
Kyung Sun Park, Xuyi Luo, Justin J. Kwok, Azzaya Khasbaatar, Jianguo Mei, Ying Diao
Summary: Understanding the solution-state aggregate structure and its impact on hierarchical assembly is crucial for controlling the morphology and properties of solid thin films. This study investigates different conjugated polymer systems and reveals the differences in solution aggregate structures and their influence on chiral assembly.
ACS CENTRAL SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Xuefei Li, Xiaokang Wang, Liyan You, Kejie Zhao, Jianguo Mei
Summary: This study demonstrates an effective strategy to improve the cycling stability of yellow-to-transmissive electrochromic polymers (ECP-Yellow) and introduces the concept of effective overpotential. The results show that lowering the effective overpotential, instead of just reducing the oxidation onset potential, is the key to achieving stable cycling. Additionally, the strategy has been successfully applied to other electrochromic polymers with high-energy absorption.
ACS MATERIALS LETTERS
(2022)
