We describe the use of Carbon Dots C-Dots as selective contact for electronic holes in inverted hybrid light emitting diodes. More-over, we have studied the effect of the C-Dots amine-derivative surface ligands and their impact on the device performance.
The different surface ligands not only affect the optical properties of the C-Dots but also the device turn-on voltage and the luminance parameters, despite not forming part of the emissive layer. For instance, the C-Dots capped with the aromatic ring p-phenylenediamine show unfavorable effects whereas the effect of non-aromatic capping ligands depends upon the length of their molecular backbone. Both films exhibit critical transition temperatures Tc of This is achieved by exploiting the frequency shift of resonant filters.
For this purpose we have fabricated coplanar waveguide CPW structures incorporating ultra-compact Peano space filling curves, each resonating at a different frequency between 5 and 35 GHz on two types of substrates, one with the Ge-doped VO2 thin films and another one using only SiO2 to serve as reference. The reported results and analysis contribute to the advancement of the field of metal-insulator-transition material technology with high Tc for RF industrial applications.
Here, we prepared cobalt-metal organic framework MOF by anodic electrodeposition at room temperature and transformed it first to Co3O4 by calcination. The MOF-derived Co3O4 retained the original dodecahedral morphology and these morphological features were essentially preserved in CoSe derived from the Co3O4 template via anion exchange.
Both the parent oxide and the chalcogenide were characterized by a variety of spectroscopic and microscopic methods. The MOF-derived CoSe was demonstrated as a non-enzymatic glucose sensor, with an analytical sensitivity of We present resistive switching characteristics in methylammonium lead iodide CH3NH3PbI3 films through a noncontact electrical poling process towards memristive applications. The noncontact nature of the poling process was induced through a scanning tunneling microscope STM tip, so that formation of metal filaments could be ruled out.
The perovskite films were seen to exhibit a resistive-switching upon application of a voltage pulse with presence of a high-resistive state HRS and a low-resistive state LRS ; magnitude and width of the voltage pulse were varied to deliberate on the parameters necessary to activate the switching phenomenon.
Amongst the underlying mechanisms proposed so far, formation and subsequent rupture of metal-like filaments due to migration of iodide-vacancies have been identified to be responsible for the resistive-switching in the perovskite material. The understanding of structure-property relationship and exploration of novel physical properties are current research topics of molecular switchable dielectric materials. The structural analysis reveals that PbBrCl consists of organic ammonium cation and a four-fold cross-linking spiral inorganic anion chain, in which Pb atom is five-coordinated with Br atoms adopting a square-pyramidal geometry, which is further connected with four neighboring square-pyramids by sharing four Br atoms at the vertices of square-pyramid bottom.
PbBrCl can be used as a dielectric switch with very high temperature Kand a semiconductor and broadband red fluorescent material. We report a significant improvement in the operational stability and photosensitivity of an interdigitated photodetector using a hybrid sensing material based on a reduced graphene oxide gel femtogel and poly methyl methacrylate PMMA.
By coating the reduced graphene oxide photodetector with a protective layer of PMMA, a noticeable current stability is achieved, either during a sweep or fixed voltage, compared to an unprotected photodetector. This change in the sensing mechanism of the graphene-based device, as a result of encapsulating the sensing area using a polymeric thin layer, is reported for the first time.
This study provides an avenue for engineering the performance and reliability of graphene oxide photodetectors that operate in an ambient environment in order to solve the current bottleneck issue, resulting from lack of reliability, in commercializing these material.
All-inorganic halide perovskites are considered as favorable material for various electronic applications due to their superior functionality and stability. The threshold switching appears for a low compliance current ICCwhereas the memory switching is initiated by setting a higher ICC. The resistive memory switching operations along with multilevel programming, moderate endurance and retention performance shows the reproducible and reliable nonvolatile high density memory feature.
The robustness and mechanical flexibility is established by uniform current-voltage curves under various bending diameters and flexing cycles. Also, the first principle density functional theory DFT calculations, demonstrates the contribution of each element in the conduction band and valence band of the RbPbBr3 with a direct band gap 2.
Textile structural antennas are critical components in case of modern wireless communication devices for wearable electronics and multifunctional structures. During the practical applications, deformation of the fabric-based antenna is unavoidable, which may deteriorate antenna performance.Log in.
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Renew your membership, and continue to enjoy these benefits. Not Now. Grab your lab coat. Let's get started Welcome! It seems this is your first time logging in online. Please enter the following information to continue. As an ACS member you automatically get access to this site. All we need is few more details to create your reading experience. Not you? Sign in with a different account.Encouraging progress has been made in the development of solution-processable perovskite light-emitting diodes PeLEDs.
However, the related fundamental physics of the efficient operation of the large-area PeLEDs is still far from adequate. In this work, we report our recent efforts in developing a high-performance large-area cesium lead bromide CsPbBr3 PeLEDs through a controlled growth of the CsPbBr3 emission layer using a hybrid additive in the CsPbBr3 precursor solution.
We found that the performance of the CsPbBr3 PeLEDs, prepared using the precursor solution having a hybrid additive of PEO and Cs2CO3, is superior to that of the control PeLEDs, prepared using a pure CsPbBr3 precursor solution in two ways: 1 it helps to suppress both the structural defects and nonradiative recombination-induced leakage current and 2 it assists in improving the electron—hole current balance.
The 1. Memristive switching with digital set and multistep analog reset characteristics were demonstrated in tantalum oxide Ta2O5 -based resistive random access memory RRAM devices using Ti and Ag top electrodes TEs.
The Ta2O5-based device with a Ti TE requires a forming process to initiate the switching and exhibits a gradual resistance increase behavior with the sequential increase in voltage in the reset process. The Ta2O5-based device with a Ag TE does not require a forming process and shows a gradual resistance increase behavior after an abrupt reset with a sequential increase in voltage in the reset process.
The difference in switching behavior is because of the difference in the composition of the conducting filament in both devices.
The Ta2O5-based device with a Ag TE presents a dual-mode switching mechanism with coexistence of Ag and oxygen vacancy-driven filament formation. The configuration of the conducting filament is controlled by the compliance current Icc. The resistive switching occurs because of oxygen vacancy filaments at low Icc, whereas it is due to dual filaments consisting of Ag and oxygen vacancies at high Icc.
This is confirmed by the analyses of the temperature dependence of the conducting filament and the conduction mechanism. These results with unique dual-mode switching behaviors will help identify the conducting filament mechanisms and overcome the technical limitations faced by the RRAM devices.
Developing high-performance p-channel oxide thin-film transistor TFT and practical oxide TFT-based complementary circuits is the most persistent challenge for oxide electronics and a major hurdle for future oxide device technology to overcome.
Tin monoxide, SnO, is known as one of the promising candidates for an active layer of p-channel oxide TFT, owing to its reasonably high hole carrier mobility over 1 cm2 V—1 s—1 and low-cost processability.
However, high-density subgap defect spoils its high potential for electronic devices and hinders the development of SnO-based high-performance p-channel oxide TFTs. Here, we present hydrogen-defect termination for SnO to improve the device performance of p-channel oxide TFT. This present achievement is an important step toward building low-cost next-generation oxide electronics.
Paper-based electronics are gaining increasing attention because of their merits of low cost, degradability, and foldability. However, the roughness and porosity of paper are not conducive to the deposition of functional layers by conventional film-coating methods such as solution processing and vacuum evaporation. In this work, a facile yet feasible process to fabricate a paper-based electrophoretic display EPD was demonstrated. This device combines the eco-friendly characteristic of paper with the low power consumption of an EPD by using optically clear adhesive OCA and silver nanowires AgNWs.
The paper-based EPD demonstrated in this work has the merits of foldability, disposability, environmental friendliness, low cost, and low power consumption, presenting an alternative for future application scenarios of displays. The possibility of tailoring the critical strain of two-dimensional 2D materials will be crucial for the fabrication of flexible and stretchable devices.
While crystalline MoS2 monolayer shows tensile strength comparable to that of steel, a large concentration of defects and grain boundaries in polycrystalline MoS2 significantly degrades its mechanical properties. In this paper, the fracture in polycrystalline MoS2 films with an average grain size below 10 nm is studied at the micro- and nanoscale using electron microscopy. Two samples with different thicknesses and grain orientations horizontal and vertical to the sample plane are measured.
This enhancement of strain resistance was used to fabricate a mechanically robust array of MoS2 lines 1 mm in length. Finally, nanoscale crack propagation studied by transmission electron microscopy showed that cracks propagate along the grain boundaries as well as through the grains, preferentially along van der Waals planes. These results provide insight into the fracture of polycrystalline 2D materials and a method to enhance the critical strain. A synergistic, nanoscale electrical interface with the membranes of exoelectrogenic microbes will have a transformative impact on biological cell-based electronic devices.
Here, we report that a conformal graphenic interface on a biocatalytic Geobacter sulfurreducens membrane results in quantum-capacitance-induced n-doping in reduced graphene oxide rGO that further enhances electron shuttling from the membrane to improve electron harvesting from the electrogenic organism.
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The quantum coupling of rGO with the connected protein-membrane channels leads to an additional electron density of 3. This n-doping enhances the electron-transfer rate from the cell membrane into the rGO via a net driving potential of meV with a 3-fold increase in power density. The synergistic electron harvesting and conformal membrane interfacing of flexible two-dimensional 2D nanomaterials can lead to an evolution in the design of microbe circuitry to power stand-alone nanodevices.
The energy crisis and the rise of flexible electronics call for a renewable and flexible energy source due to the inconvenience of the traditional power supply.Sign In. Research is often a slow process, requiring the careful design, optimization, and replication of experiments. By the time you have accrued enough data to write a manuscript, you will likely want to publish as soon as possible.
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ACS Travel Award Learn more about travel awards for those attending scientific meetings to present the results of their research. Launching in lateACS Applied Electronic Materials and ACS Applied Polymer Materials will publish original research covering all aspects of electronic materials and polymers, respectively, emphasizing applied work across the fields of chemistry, biology, engineering and physics.
Kirk Schanze, Ph. These launches bring the family of applied materials journals led by Schanze to six, reflecting the growth in high-quality applied research being undertaken globally in the associated interdisciplinary fields.
Hyun Jae Kim, Ph. Jodie Lutkenhaus, Ph. Her research interests include redox active polymers, polyelectrolytes and energy storage. Both journals will publish original research articles, research letters and timely reviews, among other editorial features.
Authors will benefit from the broad range of exceptional author services from ACS Publications, as well as expert editorial review handled by active researchers, rapid publication, and flexible and affordable open access publishing options.
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Communities Find a chemistry community of interest and connect on a local and global level. Discover Chemistry Explore the interesting world of science with articles, videos and more.The cover art depicts the fabrication of the core-shell p-n junction organic single crystals for organic phototransistors. The ambipolar core-shell crystals show balanced hole and electron mobilities and excellent optoelectronic characteristics.
This ambipolar core-shell crystal can be used for various applications including high-performance integrated circuits and photosensors. Despite the great progress of ferroelectric gated field-effect transistors Fe-FETs based on graphene and other 2D materials, a device model that accurately describes the hysteretic transfer characteristics and provides guidelines on performance enhancement of the Fe-FET is still lacking.
Here, we present an experimentally validated analytical model that couples charge displacement of the ferroelectric layer with the charge transport in the graphene layer. The model predicts the unsuitability of an ideal graphene layer for memory application and outlines the conditions to achieve the best memory performance in graphene Fe-FETs.
Electronic devices based on organic single-crystal semiconductors have been used in a range of applications, suggesting their possible use as core components of high-performance electronic devices. Various electronic devices based on unipolar organic semiconducting crystals have high electrical and optoelectronic properties compared to thin-film-based devices due to the intrinsic nature of the single crystal, such as a long-range order and a high degree of structural perfection.
However, only a few studies have examined electronic devices using organic single crystals with ambipolar characteristics. This study investigated the electrical and optoelectronic characteristics of a core—shell organic semiconducting crystal composed of an n-type single-crystal nanowire as the core and p-type single crystal as the shell. The device showed ambipolar behavior with balanced electron and hole mobilities maximum electron and hole mobility of the core—shell ambipolar crystal; 1.
A core—shell ambipolar crystal was also used as the photoactive layer of a complementary metal—oxide—semiconductor CMOS -like inverter, and sharp voltage conversion was observed near 50 V at a supply voltage of V with a gain of Phototransistors based on core—shell semiconducting crystals also showed rapid photoswitching behaviors under pulsed incident light.
The ambipolar core—shell crystals we developed can potentially be used for various applications, including high-performance integrated circuits and photosensing electronic devices.
Multiferroic materials have shown significant potential for next generation nanoelectronic and multifunctional devices due to their coexistent order parameters and versatile tunabilities. Nevertheless, the selectivity of the room temperature multiferroics is extremely limited. In this manner, single-phase solid-solution-type multiferroics that are composed by distinct oxides exhibiting either ferroelectricity or ferromagnetism individually have offered an alternative route toward the advancement of room temperature multiferroic systems.
In this work, single crystalline lead iron tantalate lead zirconate titanate PZTFT thin films have been investigated for broadening the advancement of room temperature solid-solution multiferroics.
ACS Applied Electronic Materials
The PZTFT thin films have been grown by pulsed laser deposition, while the ferroelectric and ferromagnetic properties are revealed by a combination of scanning probe microscopy and synchrotron-based X-ray absorption spectroscopy.
Our results have further revealed remarkable fatigue and retention behaviors of PZTFT thin film, suggesting its potent role for practical applications. This work provides a potential approach to achieve a high-performance low-voltage TFT by selecting a suitable combination of dielectric materials.
The long-term stability issue of metal halide perovskite nanocrystals NCs is one of the challenges for applications in optoelectronic devices.
In addition, the composites show excellent stability with almost identical luminescent behavior for more than 60 days upon continuous exposure in air, moisture, and light irradiation, which is superior to the other previous reports.
Moreover, we have used these green- and red-emitting composite sheets to fabricate white light-emitting diodes LEDs by stacking them on top of the blue LED.ACS Omega is a global open-access journal for the publication of scientific articles that describe new findings in chemistry and interfacing areas of science, without any perceived evaluation of immediate impact. Articles in ACS Omega should advance the frontiers of science through original ideas, even if the full significance is not known.
ACS Omega disseminates this knowledge globally and quickly by immediately making all accepted articles open access in perpetuity. Papers published in ACS Omega are therefore available to a much wider readership that includes industry, policy institutions, the media and the public, in addition to the traditional academic sector.
The journal publishes Perspectives by invitation only : concise, peer-reviewed reports highlighting an emerging topic of broad interest. Submissions are based on original work not previously published. Research Articles. Reports of original research with chemical connections.
Emerging multidisciplinary fields are especially encouraged; however, research submitted to the journal should be hypothesis driven or lead to a hypothesis. No minimum length requirement is imposed for original submissions, noting that for ACS Omega content traditionally considered as letters or rapid communications as well as full articles all fall into the category of Research Articles. The Editors request that authors explain their findings concisely and accurately.
Authors are encouraged to use Supporting Information as appropriate. These are intended to contain three main components: a valid hypothesis that is expected to answer a relevant scientific question, scientifically rigorous research, and results that do not uphold the initial hypothesis.
The results are then negative but can be of importance to researchers in the field or can give rise to a new hypothesis. These reports are not intended to be a comprehensive look at the field but rather to place a particular research finding into broader context. The emphasis should be on the future outlook of an emerging topic rather than a historical overview of it. Authors of Perspectives are encouraged to also submit a video min clip highlighting the theme of their Perspective.
Perspectives are invited by the Editors, but authors interested in submitting a Perspective should contact the journal prior to manuscript preparation and submission to seek conditional approval of the proposed topic.
One-page proposals should be sent to the Managing Editors managing. Mini-Review Articles are short reviews focusing on the most recent developments in an area. Authors are requested to include a brief biography. Mini Review articles are preferred in interdisciplinary areas between Chemistry and other disciplines.
We also welcome Mini Reviews on emerging techniques, tools imaging microscopy, spectroscopy and so oncell assays, new analytical methods and new computational methods and so on. While this document will provide basic information on how to prepare and submit the manuscript as well as other critical information about publishing, we also encourage authors to visit the ACS Publishing Center for additional information on everything that is needed to prepare and review manuscripts for ACS journals and partner journals, such as.
All ACS journals and partner journals have simplified their formatting requirements in favor of a streamlined and standardized review-ready format for an initial manuscript submission.
Read more about the requirements and the benefits these serves authors and reviewers here. A cover letter must accompany every manuscript submission.
During the submission process, you may type it or paste it into the submission system, or you may attach it as a file. A cover letter should accompany each original submission. Recommended information includes the following:. Given the broad reach and the open availability of all content in ACS Omegaremember that chemists, scientists in related disciplines, and the broad public will read articles published.
When writing, seek to communicate the science in a way that is accessible to all scientists. Titles should clearly and concisely reflect the emphasis and content of the paper and be accessible to a broad audience.
Titles are one of the most important tools for current awareness and information retrieval—they provide readers a first opportunity to understand the purpose of the article. Authors should avoid uncommon abbreviations in titles. It is recommended that the length of titles not exceed 15 words.