Article
Nanoscience & Nanotechnology
Je-Heon Oh, Jin-Woo Park
Summary: Researchers have developed a stretchable phosphorescent light-emitting layer for organic light-emitting diodes (is-OLEDs) by blending additives with a polymer host and emitting dopant. By changing the emitting dopant, they were able to control the emission colors and improve the mechanical and electrical properties of the stretchable OLEDs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Ruttapol Malatong, Chokchai Kaiyasuan, Phattananawee Nalaoh, Siriporn Jungsuttiwong, Taweesak Sudyoadsuk, Vinich Promarak
Summary: By using molecular twisting and different side group substitutions, three anthracene-based deep blue emitters were effectively developed, exhibiting strong deep blue photoluminescence and high OLED device performance.
Article
Polymer Science
Yan Li, Xiaohan Wu, Jinyi Zhang, Congcong Han, Mengmeng Cao, Xiangrong Li, Jieqiong Wan
Summary: Covalent organic frameworks (COFs) with highly conjugated structures have been synthesized and demonstrated potential for optoelectronic applications, such as white-light emitting diodes (WLEDs). The designed COFs exhibited bright emission, fast fluorescence decay, and high stability, making them attractive for practical devices.
Article
Nanoscience & Nanotechnology
Ramesh Nandi, Anna Orieshyna, Nadav Amdursky
Summary: This study presents a protein-based elastomer that can bind various chromophores and prevent their aggregation. Energy transfer among five different chromophores within the protein matrix is explored, and control over blue, green, and red chromophores results in tunable emission properties and white-light generation. The affordability and simplicity of the chosen protein and molecular doping strategy make these protein elastomers attractive for investigating energy transfer in proteins and potential integration in light-emitting applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Xing Wu, Jiajie Zeng, Xiaoluo Peng, Huijun Liu, Ben Zhong Tang, Zujin Zhao
Summary: In this study, two sky-blue luminescent materials, mCP-BP-DMAC and DCB-BP-DMAC, were synthesized and characterized. They showed excellent thermal and electrochemical stabilities, strong aggregation-induced delayed fluorescence, and high efficiency in OLEDs. These materials have great potential for applications in display and lighting devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Jing Chen, Qianqian Huang, Wei Lei
Summary: We report on a green, dual emissive quantum-dot light-emitting diode (QLED) using alumina-doped zinc oxide (AZO) to adjust the band offset between the cathode and QD-emitting layers, enhancing hole injection and slowing down electron injection from AZO to QD.
Article
Nanoscience & Nanotechnology
Rinki Kumari, Ashok Kumar, Kanchan Negi, Sumanta Kumar Sahu
Summary: A solvent-controlled method was used to synthesize multicolor-emissive carbon dots (CDs) from 1,2,4-triaminobenzene and melamine, with different colors achieved by using different solvents. Fluorescent polymeric films were made to avoid aggregation quenching emission, and solid films were used to develop light-emitting diodes. Additionally, room-temperature phosphorescence was achieved by a molten salt method using the synthesized CDs as carbon precursors.
ACS APPLIED NANO MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Cyril Poriel, Joelle Rault-Berthelot
Summary: Thanks to tremendous efforts over the past 20 years, phosphorescent organic light-emitting diodes (PhOLEDs) have become a prevalent technology. Developing high-performance single-layer PhOLEDs (SL-PhOLEDs) is challenging due to the need to ensure efficient charge injection, transport, and recombination within the emissive layer. An analysis of different molecular design strategies for constructing high-efficiency hosts for SL-PhOLEDs has been conducted.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Optics
Shi-Jie Zou, Xin-Yi Zeng, Yan-Qing Li, Jian-Xin Tang
Summary: WOLEDs, especially SEL-WOLEDs, are considered promising candidates for full-color display and solid-state lighting due to their high efficiency, white color balance, simple fabrication, and large-area manufacturing possibilities. Recent strategies focus on molecular design, energy transfer mechanisms, and combining different emitters to improve device performance in SEL-WOLEDs. Future prospects and technological challenges of SEL-WOLEDs are also discussed.
LASER & PHOTONICS REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Gyu Jin Choi, Jeong Won Ryu, Ji-Young Jeong, Tae-Jin Je, Dong Ki Yoon, Jin Seog Gwag
Summary: The study shows that combining an organic light-emitting display (OLED) device with an advanced optical film can achieve highly enhanced light extraction and low ambient light reflection without the need for a polarizer. The optical efficiency of the OLED device with the proposed film has been significantly improved compared to a polarizer-based OLED device, with external light reflection reduced to approximately 10%. Experimental data confirms that the film for enhancing optical efficiency (FEOE) improves the overall optical efficiency of OLED devices, making FEOE-based OLEDs of significant interest in materials science and display devices.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Zhagen Miao, Can Gao, Haikuo Gao, Zhengsheng Qin, Wenping Hu, Huanli Dong
Summary: This study demonstrates the construction of high-efficiency uniform area-emissive OLETs that enable color-tunable and white emission through efficient energy transfer. The OLETs achieve a high external quantum efficiency and exhibit good loop stability and low driving voltage.
ADVANCED MATERIALS
(2023)
Review
Polymer Science
Wenjing Xiong, Cheng Zhang, Yuanyuan Fang, Mingsheng Peng, Wei Sun
Summary: Organic/polymer light-emitting diodes (OLEDs/PLEDs) have gained attention for their applications in full-color displays and solid-state lighting. Near-infrared (NIR) emitting dyes are being investigated for their potential in electroluminescence and optical imaging. This review focuses on the progress in conjugated polymers and organic molecules for OLEDs/PLEDs, specifically the relationship between organic fluorophore structures and electroluminescence properties. Approaches to enhance the performance of NIR OLEDs/PLEDs are also briefly discussed.
Article
Chemistry, Multidisciplinary
Yu-Jin Kim, Sung-Won Kim, Ju-Ro Lee, Soong Ho Um, Yoon Ki Joung, Suk Ho Bhang
Summary: This study investigated the cytotoxic effects of LED and OLED light sources on stem cells, finding that the LED group induced higher apoptotic activity due to significant heat generation compared to OLED. Additionally, the LED group showed significant expression of intracellular reactive oxygen species, while increased cell proliferation was confirmed in the OLED group.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Review
Computer Science, Information Systems
Yubu Zhou, Huayu Gao, Jing Wang, Fion Sze Yan Yeung, Shenghuang Lin, Xianbo Li, Shaolin Liao, Dongxiang Luo, Hoi Sing Kwok, Baiquan Liu
Summary: Organic light-emitting diodes (OLEDs) are a promising technology for displays and lighting due to their numerous advantages. Ultrathin emitting nanolayers (UENs) have been used to develop OLEDs without the doping technique, simplifying device structure and achieving comparable performance to doped devices. This review comprehensively summarizes recent progress in UEN-based OLEDs, including a comparison between doped and doping-free OLEDs, effective design approaches, and future development prospects.
Article
Chemistry, Multidisciplinary
Qingbin Li, Yihan Zhang, Junfeng Lin, Ye Zou, Pu Wang, Zhengsheng Qin, Yongshuai Wang, Yang Li, Yu Zhang, Can Gao, Yaping Zang, Wenping Hu, Huanli Dong
Summary: Two new dibenzothiophene sulfone-based organic semiconductors with high solid-state photoluminescence quantum yield and typical ambipolar transport character in simple-structured organic light-emitting transistors were designed and synthesized. The ambipolar property of these materials is attributed to the interfacial dipoles effect on gold electrodes induced by the incorporation of appropriate DBSO unit. The achievement of high-quality blue electroluminescence in the SS-OLET demonstrates good spatial control of the recombination zone in the conducting channel.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Robert D. Murphy, Ronnie V. Garcia, Seung J. Oh, Tanner J. Wood, Kyoo D. Jo, Javier Read de Alaniz, Ed Perkins, Craig J. Hawker
Summary: Describes the synthesis of functional hydrogels from 3-arm diblock copolypeptide stars, which achieve mechanical stability and biological activity through physical and photo-crosslinking, enabling direct ink writing of 3D objects with high precision and biological viability.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Marshall J. Allen, Hsu-Ming Lien, Nathaniel Prine, Carter Burns, Adrian K. Rylski, Xiaodan Gu, Lewis M. Cox, Filippo Mangolini, Benny D. Freeman, Zachariah A. Page
Summary: Access to multimaterial polymers with spatially localized properties and robust interfaces is anticipated to enable new capabilities in soft robotics, such as smooth actuation for advanced medical and manufacturing technologies.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Composites
Younghoon Kwon, Soyoung E. Seo, Jaejun Lee, Szabolcs Berezvai, Javier Read de Alaniz, Claus D. Eisenbach, Robert M. McMeeking, Craig J. Hawker, Megan T. Valentine
Summary: Additive manufacturing allows the creation of bio-inspired materials with complex architectures and diverse properties. By using a digital light processing strategy, polymer foams with controlled porosity were 3D printed by incorporating thermally expandable microspheres. The foams showed remarkable resilience under cyclic loading, maintaining their modulus and energy dissipation even at large deformations.
COMPOSITES COMMUNICATIONS
(2023)
Article
Polymer Science
Oscar Nordness, Joshua D. Moon, Nico Marioni, Everett S. Zofchak, Peter M. Richardson, Matthew R. Landsman, Lynn E. Katz, Craig J. Hawker, Venkat Ganesan, Rachel A. Segalman, Raphaele J. Clement
Summary: The effects of ligand basicity on water and ion transport within hydrogel membranes are investigated using a library of functionalizable poly(ethylene glycol) diacrylate (PEGDA) polymer networks. The study reveals that the self-diffusion of water molecules and ions is primarily driven by the hydration level of the membrane. The interaction between triflate anions and the polymer significantly reduces ion and water mobility.
Article
Polymer Science
KaitlinR. Albanese, Yoichi Okayama, Parker T. Morris, Matthias Gerst, Rohini Gupta, Joshua C. Speros, Craig J. Hawker, Chungryong Choi, Javier Read de Alaniz, Christopher M. Bates
Summary: We report a strategy to create degradable poly(acrylate) pressure-sensitive adhesives (PSAs) using 1,2-dithiolanes as drop-in replacements for traditional acrylate comonomers. The resulting PSA materials have comparable thermal and viscoelastic properties to nondegradable analogues, but can undergo reversible transformation between high and low molecular weights through oxidative repolymerization and reductive degradation. This simple and versatile chemistry could play a pivotal role in improving the sustainability of contemporary adhesives.
Article
Materials Science, Multidisciplinary
Lynn M. Stevens, Elizabeth A. Recker, Kevin A. Zhou, Vincent G. Garcia, Keldy S. Mason, Clotilde Tagnon, Nayera Abdelaziz, Zachariah A. Page
Summary: The use of visible light for 3D printing has increased due to its accessibility and reduced materials interactions compared to UV light-based processes. However, efficient photosystems for visible light often require multiple molecular components and have diverse absorption profiles, making formulation and printing optimization more complex. This study presents a streamlined method for selecting and optimizing visible light 3D printing conditions.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Adrian K. Rylski, Tejas Maraliga, Yudian Wu, Elizabeth A. Recker, Anthony J. Arrowood, Gabriel E. Sanoja, Zachariah A. Page
Summary: Multimaterial 3D printing allows for the creation of programmable smart plastics with spatially tunable thermomechanical properties and shape-memory behavior, which can be applied in soft robotics and electronics. Digitallight processing 3D printing has shown high precision and resolution, but there is a lack of research on using this method for semicrystalline polymers. By adjusting the ratio of two long-chain acrylates, it is possible to obtain different thermomechanical properties and shape-memory behavior in the printed objects. This approach shows promise for the development of customizable actuators for biomedical applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Joy Zhou, Jinwon Seo, Yudian Wu, Cedric P. P. Ambulo, Zachary M. M. Marsh, Kyungmin N. N. Lee, Nicholas P. P. Godman, Zachariah A. Page
Summary: Spatial control over molecular order in polymeric systems has the potential to advance healthcare and photonics applications. However, current challenges in implementing noncontact ordering mechanisms such as photoalignment include the use of high-intensity light, limitations to thin films and specific substrates, multistep syntheses, and costly processing. This study reports on an optimized process using photo-polymerization and -alignment to achieve substrate-independent photoalignment of thick, optically transparent LC networks, along with photopatterning for complex images. This user-friendly process will enable the production of stimuli-responsive plastics for improved human health and information security.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ronnie V. Garcia, Elizabeth A. Murphy, Nairiti J. Sinha, Yoichi Okayama, Juan Manuel Uruena, Matthew E. Helgeson, Christopher M. Bates, Craig J. Hawker, Robert D. Murphy, Javier Read de Alaniz
Summary: Shear-recoverable hydrogels with rapid self-recovery based on block copolypeptides have the potential to be used in extrudable and injectable 3D-printing applications. By synthesizing 3-arm star-shaped block copolypeptides with different side chains and block lengths, hydrogels with diverse microstructures and mechanical properties are prepared. The study reveals that non-canonical & beta;-sheet blocks based on phenyl glycine form more stable networks with superior mechanical properties and writability compared to natural amino acid counterparts.
Article
Polymer Science
Colton A. D'Ambra, Michael Czuczola, Patrick T. Getty, Elizabeth A. Murphy, Allison Abdilla, Souvagya Biswas, Jodi M. Mecca, Thomas D. Bekemeier, Steven Swier, Craig J. Hawker, Christopher M. Bates
Summary: A versatile synthetic platform is reported for the synthesis of high molecular weight graft copolymers with excellent control over molecular weight and grafting density. The controlled nature of side-chain growth is confirmed by selective degradation of the siloxane backbone, and grafting density and functionality can be further controlled by using a mixture of thiols.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Polymer Science
Kaitlin R. Albanese, Jacob R. Blankenship, Timothy Quah, Amy Zhang, Kris T. Delaney, Glenn H. Fredrickson, Christopher M. Bates, Craig J. Hawker
Summary: The potential of ABC triblock terpolymers in improving the mechanical properties of thermoplastic elastomers is demonstrated by comparing them with symmetric ABA/CBC analogs having similar molecular weights and volume fraction of B and A/C domains. The ABC architecture enhances elasticity through full chain bridging between discrete hard domains, minimizing mechanically unproductive loops. In addition, ABC triblock terpolymers allow for a higher fraction of hard-block domains while maintaining elasticity, which is traditionally only possible with non-linear architectures or highly asymmetric ABA triblock copolymers. These advantages provide a tunable platform to create materials with practical applications while improving our fundamental understanding of chain conformation and structure-property relationships in block copolymers.
Article
Polymer Science
Meghan T. Kiker, Ain Uddin, Lynn M. Stevens, Kun-You Chung, Pengtao Lu, Zachariah A. Page
Summary: In this study, five photobase generators (PBGs) with photo-protective properties were synthesized. Through the investigation of thiol-ene polymerization reactions, it was found that halogenation at the 3-position increased the disparity between C=C and S-H conversion, while the incorporation of an extended phenyl moiety at the same position reduced the conversion gap and enabled uncaging with a blue LED. These findings provide important insights for the selection and optimization of future light-activated catalysts and enable advanced manufacturing of tailored soft materials.
Article
Chemistry, Multidisciplinary
Hu Wang, Leighton O. O. Jones, Tian Zhao, Inhong Hwang, Vincent M. M. Lynch, Niveen M. M. Khashab, George C. C. Schatz, Zachariah A. A. Page, Jonathan L. L. Sessler
Summary: We describe a copolymeric fluorescent sensor that exhibits selectivity towards lithium chloride. The sensor is composed of two constituent polymers, one containing triphenylethylene (TPE) moieties for aggregate induced emission (AIE), and the other incorporating strapped-calix[4]pyrrole or secondary ammonium groups for self-assembly induced aggregation. Addition of LiCl in acetonitrile disrupts the host-guest crosslinks and leads to disaggregation of the polymer chains, resulting in decreased TPE emission. The lack of AIE perturbation upon addition of other salts demonstrates the high selectivity of the sensor towards LiCl. This supramolecular dual polymer approach can complement traditional sensor systems.
Review
Nanoscience & Nanotechnology
Yiqing Wang, Zhenzhen Wu, Faezeh Makhlooghi Azad, Yutong Zhu, Lianzhou Wang, Craig J. Hawker, Andrew K. Whittaker, Maria Forsyth, Cheng Zhang
Summary: The incorporation of fluorine into battery components can improve the energy density, safety, and cycling stability of rechargeable batteries. This review explores the design and utilization of fluorine-containing species in advanced batteries, examining the relationship between their chemical structure and battery performance. It also discusses the challenges and opportunities of fluorinated batteries within the present regulatory framework.
NATURE REVIEWS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kun-You Chung, Ain Uddin, Zachariah A. Page
Summary: This study demonstrates the use of two metal-free boron dipyrromethene (BODIPY) photocages to induce rapid and efficient polymerizations upon exposure to low intensity green LED light. The uncaging and polymerization mechanisms were characterized using spectroscopic tools, and the reaction quantum efficiencies were determined. The BODIPY photocages showed significantly faster step-growth polymerizations compared to other TMG-bearing photocages. Additionally, the inherent multifunctionality of the BODIPY platform was leveraged to prepare polymers with distinct physical properties. These findings are expected to have important applications in small-molecule photochemistry and advanced manufacturing of soft materials.
