Article
Nanoscience & Nanotechnology
Valentin Diez Cabanes, Colin Van Dyck, Silvio Osella, David Cornil, Jerome Cornil
Summary: This research introduces different concepts implemented in organic thin films and molecular junctions, as well as a new method of incorporating photochromic molecules into organic electronic devices. The discussion also highlights some issues that have been emphasized through theoretical modeling.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
Jinhao Xu, Hao Yan, Muhammad Umair Ali, Lijie Wu, Jingsheng Miao, Jinqiao Cai, Jiaoyi Ning, Biao Yang, Ming Liu, Clifton Kwang-Fu Shen, Hong Meng
Summary: Exploring multifunctional charge transport materials with well-matched energy-levels alignment and compatible interfaces is a potential approach towards high-performance perovskite light-emitting diodes (PeLEDs). In this study, an anthracene derivative, BAEBi, is demonstrated as an efficient electron transport layer (ETL) and surface passivation agent for near-infrared quasi 2D PeLEDs. BAEBi improves charge-carrier balance, suppresses interfacial defects, and enhances device performance, demonstrating potential for solid-state lighting and high-resolution displays.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Hiroshi Tasaki, So Shikita, In Seob Park, Takuma Yasuda
Summary: This study introduces a family of TADF materials functionalized with carboxylate esters, which demonstrate high external electroluminescence quantum efficiencies of 6.3-18.7% in non-doped organic light-emitting diodes due to their suppressed concentration-quenching effect in neat films.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Anna S. Miroshnichenko, Konstantin Deriabin, Maria Baeva, Fedor M. Kochetkov, Vladimir Neplokh, Vladimir V. Fedorov, Alexey M. Mozharov, Olga Yu Koval, Dmitry Krasnikov, Vlad A. Sharov, Nikita A. Filatov, Dmitry S. Gets, Albert G. Nasibulin, Sergey Makarov, Ivan S. Mukhin, Vadim Yu Kukushkin, Regina M. Islamova
Summary: The combination of transparent and durable silicone rubbers with semiconductor materials has enabled the design of highly flexible LEDs. By developing electrodes based on composite materials and nanowires, a novel platform for fabrication of flexible optoelectronic devices has been proposed.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Applied
Feng Guo, Mingrui Zhang, Sen Zhao, Liwen Hu, Biao Xiao, Lei Ying, Renqiang Yang
Summary: In this study, a series of blue chromophores with different conjugation lengths were developed and introduced into PPF derivatives. The incorporation of these blue chromophores enhances the thermal stability and suppresses interchain interactions, resulting in high thermal decomposition temperatures, high photoluminescence quantum yields, and smooth surface morphology for the copolymers. In addition, the corresponding blue polymer light-emitting devices (PLEDs) based on these copolymers exhibit good blue light emission and excellent stability of electroluminescence spectra. The results demonstrate that tuning the conjugation length of bulky chromophores is an effective molecular design strategy for highly stable and efficient blue PLEDs.
Article
Chemistry, Physical
Kiun Cheong, Unhyeok Jo, Wan Pyo Hong, Jun Yeob Lee
Summary: A blue tetradentate Pt(II) complex named Pt-tmCyCz is developed by introducing a cycloalkyl unit fused to carbazole to improve the rigidity and bulkiness of the complex. The complex exhibits high external quantum efficiency, narrow full width at half maximum, and stable spectrum in OLEDs.
Article
Physics, Applied
Sheikh Ifatur Rahman, Zane Jamal-Eddine, Zhanbo Xia, Mohammad Awwad, Robert Armitage, Siddharth Rajan
Summary: This study provides an accurate prediction of the characteristics of GaN/InGaN light emitting diodes by incorporating low and high indium compositions within quantum wells at the submicrometer scale. Previous explanations for the transport mechanisms across InGaN/GaN heterostructures in these devices have been lacking.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Victor Garcia-Lopez, Niccolo Giaconi, Lorenzo Poggini, Joaquin Calbo, Amelie Juhin, Brunetto Cortigiani, Javier Herrero-Martin, Enrique Orti, Matteo Mannini, Miguel Clemente-Leon, Eugenio Coronado
Summary: The synthesis and characterization of a new Co(II) spin-crossover (SCO) complex based on a 4'-(4-carboxyphenyl)-2,2':6',2''-terpyridine ligand are described. The complex can be successfully grafted on the surface of silver while maintaining the spin-crossover behavior. Various techniques including AFM, MALDI-TOF MS, Raman spectroscopy, and XPS measurements confirmed the formation of a monolayer of intact molecules grafted onto the Ag surface through carboxylate groups. Raman spectroscopy, XPS, and XAS supported by first-principles calculations demonstrated a gradual spin transition of the deposited molecules with temperature, which is unprecedented for a monolayer of molecules directly grafted onto a metallic surface.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hisaki Tsuneyama, Hisahiro Sasabe, Yu Saito, Taito Noda, Daiki Saito, Junji Kido
Summary: In this study, highly stable and efficient deep-red OLEDs were achieved by using a novel exciplex host system. The optimized device exhibited a lifetime that was 6.6 times longer than state-of-the-art deep-red OLEDs and maintained a high maximum external quantum efficiency at a low operating voltage.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Murali Gedda, Despoina Gkeka, Mohamad Insan Nugraha, Alberto D. Scaccabarozzi, Emre Yengel, Jafar Khan, Lain Hamilton, Yuanbao Lin, Marielle Deconinck, Yana Vaynzof, Frederic Laquai, Donal D. C. Bradley, Thomas D. Anthopoulos
Summary: This study reports highly efficient green PeLEDs based on blends of low-dimensional hybrid perovskite and organic semiconductor, which achieve greatly enhanced performance characteristics through the use of self-assembled monolayers as hole-injecting layers.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Li Wan, Xingyuan Shi, Jessica Wade, Alasdair J. Campbell, Matthew J. Fuchter
Summary: This article presents highly efficient circularly polarized polymer light-emitting diodes (CP-PLEDs) for deep-blue emission by blending achiral luminescent polymer with helically chiral molecules. State-of-the-art device performance was achieved with different phase structures, showcasing high current efficiency and emission dissymmetry. The study provides insight into mechanisms underlying strong circularly polarized emission from excitonically coupled polymer chains in solid-state devices.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Lili Sun, Ning Sun, Man Xu, Chen Sun, Lubing Bai, Jinyi Lin, Linghai Xie, Xinwen Zhang, Qi Wei, Yingguo Yang, Wei Huang
Summary: Interchain aggregation in wide bandgap light-emitting conjugated polymers (LCPs) and their optoelectronic devices can be successfully suppressed through cross-linking chemical. The cross-linked film with a rigid physical molecular landscape and dense interchain packing effectively reduces residual defect emission. The cross-linked film exhibits deep-blue lasing behavior and high current efficiency.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Multidisciplinary Sciences
Shofu Matsuda, Chikara Itagaki, Kyoya Tatsuguchi, Masamichi Ito, Hiroto Sasaki, Minoru Umeda
Summary: This study investigates the effect of Au/fullerene-doped TPA interface on efficient hole injection, finding that using C-70 as a dopant can significantly reduce the hole injection barrier. The ion-dipole interaction between TPA and fullerenes is considered to play a role in reducing the barrier height based on cyclic voltammetry.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Shahar Dery, Israel Alshanski, Evgeniy Mervinetsky, Daniel Feferman, Shlomo Yitzchaik, Mattan Hurevich, Elad Gross
Summary: The study investigated the impact of surface-adsorbate interactions on the adsorption geometry of stilbene-NHCs monolayers and its influence on surface potential. It was found that stilbene-NHCs on Au film accumulated in a vertical orientation for high photoisomerization efficiency, while strong metal-adsorbate interactions on Pt film led to a flat-lying adsorption geometry that quenched the photo-induced response.
CHEMICAL COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Zilong Wu, Xiangyu Zhu, Yinghao Li, Hao Chen, Zeyan Zhuang, Pingchuan Shen, Jiajie Zeng, Jiajin Chi, Dongge Ma, Zujin Zhao, Ben Zhong Tang
Summary: Organic blue luminescent materials are crucial for full-color displays and white lighting devices, but high-efficiency blue emitters are still lacking. In this study, authors designed and synthesized four bipolar deep-blue luminogens and conducted systematic research on their properties, achieving stable deep-blue light emission in OLEDs with high external quantum efficiency. The results demonstrate the strong potential of these deep-blue luminogens for applications in blue and white OLEDs.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
J. Alejandro De Sousa, Raphael Pfattner, Diego Gutierrez, Kilian Jutglar, T. Bromley Stefan, Jaume Veciana, Concepcio Rovira, Marta Mas-Torrent, Bruno Fabre, Nuria Crivillers
Summary: The preparation of monolayers based on an organic radical and its diamagnetic counterpart has been investigated on hydrogen-terminated silicon surfaces. The monolayers exhibit a characteristic diode behavior in solid-state metal/monolayer/semiconductor junctions, which is influenced by the electronic characteristics of the organic molecule. The presence of the radical significantly enhances the rectification ratio and photosensitivity of the junction.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Haijun Peng, Veronica Montes-Garcia, Jesus Raya, Hanlin Wang, Haipeng Guo, Fanny Richard, Paolo Samori, Artur Ciesielski
Summary: This study reports the use of donor-acceptor carbon-linked conjugated polymers (DA-CCPs) as cathodes in aqueous Zn-HSCs for the first time. The synthesized DA-CCP-1 and DA-CCP-2 exhibit improved electrochemical characteristics and outstanding energy density, making them promising cathode materials for high-performance aqueous Zn-HSCs. This research not only provides new perspectives for the rational design and precise synthesis of DA-CCPs, but also expands the choice of cathodes for large-scale energy storage devices.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Dongxu Zhu, Houman Bahmani Jalali, Gabriele Saleh, Francesco Di Stasio, Mirko Prato, Nefeli Polykarpou, Andreas Othonos, Sotirios Christodoulou, Yurii P. Ivanov, Giorgio Divitini, Ivan Infante, Luca De Trizio, Liberato Manna
Summary: We have successfully synthesized InAs@ZnSe core-shell nanocrystals with tunable shell thickness up to seven mono-layers (ML) and enhanced photoluminescence efficiency, achieving a quantum yield of over 70% at around 900nm. The experiments demonstrate that a high quantum yield can be obtained when the shell thickness is at least 3ML. Chemical and structural analyses reveal the absence of strain at the core-shell interface, likely due to the formation of an In-Zn-Se interlayer. Atomistic modeling confirms the existence of an interlayer composed of In, Zn, Se, and cation vacancies, similar to the structure of In2ZnSe4. The simulations also show a type-I electronic structure, where localized trap states can be passivated by a thick shell (>3ML) and excitons are confined in the core.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Anna Zhuravlova, Antonio Gaetano Ricciardulli, Dawid Pakulski, Adam Gorczynski, Adam Kelly, Jonathan N. Coleman, Artur Ciesielski, Paolo Samori
Summary: Chemical sensing of water contamination by heavy metal ions is a severe environmental problem. Two-dimensional transition metal dichalcogenides (TMDs) show potential as chemical sensors due to their high surface-to-volume ratio and unique electrical characteristics, but lack selectivity. In this study, defect-rich MoS2 flakes were functionalized to develop ultrasensitive and selective sensors for cobalt(II) ions. Through a tailored microfluidic approach, a continuous network was formed by healing the sulfur vacancies in MoS2, enabling high control over the assembly of thin and large hybrid films. The developed sensor exhibited a low limit of detection, broad concentration range, and high selectivity towards Co2+ ions.
Article
Chemistry, Multidisciplinary
Sara Gullace, Luca Cusin, Fanny Richard, Nizami Israfilov, Artur Ciesielski, Paolo Samori
Summary: The scarcity of fossil fuels calls for immediate action toward the development of clean and renewable energy resources. Proton exchange membrane fuel cells (PEMFCs) have been proposed as solid polymer electrolytes in PEMFCs due to their high crystallinity and stability to acids and bases. A simple strategy is presented to improve the performance of poor COF-based proton conductors through the addition of superadsorbent polymer sodium polyacrylate (PANa).
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Physical
Iwona Janica, Veronica Montes-Garcia, Francesca Urban, Payam Hashemi, Ali Shaygan Nia, Xinliang Feng, Paolo Samori, Artur Ciesielski
Summary: Transition metal carbides and nitrides (MXenes) are a class of 2D materials with remarkable physicochemical properties. The covalent functionalization of MXenes has been explored through diazonium salt grafting and silylation reactions. An unprecedented two-step functionalization of Ti3C2Tx MXenes is reported, where (3-aminopropyl)triethoxysilane is covalently tethered to Ti3C2Tx and serves as an anchoring unit for subsequent attachment of various organic bromides via the formation of C-N bonds.
Article
Chemistry, Multidisciplinary
Anatol Prudnikau, Hossein Roshan, Fabian Paulus, Beatriz Martin-Garcia, Rene Huebner, Houman Bahmani Jalali, Manuela De Franco, Mirko Prato, Francesco Di Stasio, Vladimir Lesnyak
Summary: Cadmium mercury selenide (CdHgSe) nanocrystals with controlled shape and heterostructure design show improved optical properties. A colloidal synthesis method is developed to synthesize CdHgSe/ZnCdS core/shell nanoplatelets with tunable emission wavelength. These nanoplatelets exhibit low turn-on voltage and high external quantum efficiency in light-emitting diodes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Adrian Tamayo, Angel Campos-Lendinez, Jose Munoz, Nuria Crivillers, Marta Mas-Torrent
Summary: A robust electrolyte-gated organic field-effect transistor (EGOFET) that can respond to pH in the range of 1-10 is reported. The sensor uses the pH-dependent supramolecular host-guest complexation of imidazole/beta-cyclodextrin to achieve response to different pH substances.
CHEMISTRY OF MATERIALS
(2023)
Article
Multidisciplinary Sciences
Ning Xu, Li Shi, Xudong Pei, Weiyang Zhang, Jian Chen, Zheng Han, Paolo Samori, Jinlan Wang, Peng Wang, Yi Shi, Songlin Li
Summary: In this study, the authors conducted a multiparametric survey on the kinetics of lateral photooxidation in WS2 and MoS2 monolayers, and discovered an unusual non-Marcusian charge transfer mechanism in these low-dimensional systems. They also proposed a scenario of band bending to explain the discrepancy in reaction barriers. These results provide important insights into the fundamental electrochemical reaction theory in low-dimensional systems.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Physical
Hao Liu, Yifan Yao, Paolo Samori
Summary: Recent developments in design and synthesis have allowed for the creation of sophisticated organic building blocks with controlled structures and properties, enabling the customization of structurally complex porous systems with precise control over their architectures and functions.
Article
Chemistry, Multidisciplinary
Cataldo Valentini, Veronica Montes-Garcia, Pietro Antonio Livio, Tomasz Chudziak, Jesus Raya, Artur Ciesielski, Paolo Samori
Summary: For the past fifteen years, the reduction of electrically insulating graphene oxide (GO) to its conducting form, reduced graphene oxide (rGO), through thermal annealing has been extensively studied. However, the high temperatures required for this process are not suitable for flexible electronics. In this study, the low-temperature annealing of GO was systematically investigated, revealing that the reduced GO (TrGO) obtained at relatively low temperatures exhibited improved electrochemical characteristics and retained its resistance after bending cycles on plastic substrates.
Article
Nanoscience & Nanotechnology
Wlodzimierz Czepa, Samanta Witomska, Paolo Samori, Artur Ciesielski
Summary: This article reports an unprecedented approach for the modification of graphene oxide (GO) using thioamide-based polymers with heteroatoms (S, N, O), which greatly enhances the electrochemical performance of symmetric supercapacitors. The use of organic media allows for a specific capacitance of up to 340 F g(-1) and energy densities as high as 94.4 Wh kg(-1), surpassing current GO-based supercapacitors. The symmetric devices also exhibit excellent stability in aqueous and organic electrolytes.
Article
Nanoscience & Nanotechnology
Serena Pilato, Samanta Moffa, Gabriella Siani, Francesca Diomede, Oriana Trubiani, Jacopo Pizzicannella, Daniele Capista, Maurizio Passacantando, Paolo Samori, Antonella Fontana
Summary: The development of 3D nanomaterials with high biocompatibility, precise mechanical characteristics, electrical conductivity, and controlled pore size is crucial for cardiac tissue engineering applications. Hybrid, highly porous tridimensional scaffolds based on chemically functionalized graphene oxide (GO) offer enhanced compositional and structural control. These scaffolds are biocompatible, promote cell adhesion and growth without interfering with cell morphology and cardiac markers, and can be used for repairing damaged heart tissues and cardiac modeling investigations.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Nicholas Turetta, Wojciech Danowski, Luca Cusin, Pietro Antonio Livio, Rawad Hallani, Iain McCulloch, Paolo Samori
Summary: In this study, we present the first example of an optically switchable OECT, which can undergo a reversible modulation of its ON current by up to 30% upon irradiation with UV and visible light. Through detailed investigations of the electrical and electronic characteristics of the channel material, we gained valuable insights into the electrochemical doping process occurring within the blend under light irradiation. This proof-of-concept work opens up possibilities for implementing complex neuromorphic operations and algorithms in OECTs.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Dongxu Zhu, Houman Bahmani Jalali, Gabriele Saleh, Francesco Di Stasio, Mirko Prato, Nefeli Polykarpou, Andreas Othonos, Sotirios Christodoulou, Yurii P. Ivanov, Giorgio Divitini, Ivan Infante, Luca De Trizio, Liberato Manna
Summary: The synthesis of InAs@ZnSe core@shell nanocrystals with adjustable shell thickness was optimized, resulting in improved emission efficiency. A high quantum yield was achieved when the shell thickness was at least 3ML. Moreover, the photoluminescence lifetime remained stable, while the Auger recombination time increased with increasing shell thickness.
ADVANCED MATERIALS
(2023)
