State-of-the-Art Active Materials for Organic Lasers

2018 ◽  
pp. 85-149 ◽  
Author(s):  
Luis Cerdán
Keyword(s):  
State Of The Art ◽  
Active Materials

scholarly journals Polymer-II-VI Nanocrystals Blends: Basic Physics and Device Applications to Lasers and LEDs

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 1036 ◽  
Author(s):  
Marco Anni
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
State Of The Art ◽  
Actual State ◽  
Active Materials ◽  
Conjugated Molecules ◽  
Light Emitting ◽  
Basic Physics ◽  
Hybrid Thin Films ◽  
Device Applications

Hybrid thin films that combine organic conjugated molecules and semiconductors nanocrystals (NCs) have been deeply investigated in the previous years, due to their capability to provide an extremely broad tuning of their electronic and optical properties. In this paper we review the main aspects of the basic physics of the organic–inorganic interaction and the actual state of the art of lasers and light emitting diodes based on hybrid active materials.

scholarly journals State-of-the-art anodes of potassium-ion batteries: synthesis, chemistry, and applications

2021 ◽  
Author(s):  
Peng Li ◽  
Hun Kim ◽  
Kwang-Ho Kim ◽  
Jaekook Kim ◽  
Hun-Gi Jung ◽  
...  
Keyword(s):  
State Of The Art ◽  
Potassium Ion ◽  
Active Materials ◽  
Critical Issues ◽  
Anode Active Materials

State-of-the-art tendency, present critical issues and future opportunities of anode active materials in potassium ion batteries are systematically summarized.

scholarly journals Amplified Spontaneous Emission and Lasing in Lead Halide Perovskites: State of the Art and Perspectives

2019 ◽  
Vol 9 (21) ◽  
pp. 4591 ◽  
Author(s):  
Maria Luisa De Giorgi ◽  
Marco Anni
Keyword(s):  
Spontaneous Emission ◽  
State Of The Art ◽  
Amplified Spontaneous Emission ◽  
Optically Pumped ◽  
Active Materials ◽  
Active Layers ◽  
Current State ◽  
Main Development ◽  
Halide Perovskites ◽  
Lead Halide

Lead halide perovskites are currently receiving increasing attention due to their potential to combine easy active layers fabrication, tunable electronic and optical properties with promising performance of optoelectronic and photonic device prototypes. In this paper, we review the main development steps and the current state of the art of the research on lead halide perovskites amplified spontaneous emission and on optically pumped lasers exploiting them as active materials.

POLYOXOMETALATE-IONIC LIQUIDS (POM-ILs)–THE ULTIMATE SOFT POLYOXOMETALATES? A CRITICAL PERSPECTIVE

2014 ◽  
Vol 02 (01) ◽  
pp. 1440001 ◽  
Author(s):  
SVEN HERRMANN ◽  
ANDREY SELIVERSTOV ◽  
CARSTEN STREB
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
State Of The Art ◽  
Critical Perspective ◽  
Active Materials ◽  
Initial Development ◽  
Electrochemically Active ◽  
Recent Developments ◽  
Key Features

In this paper, a critical perspective on the state-of-the-art, current developments and future applications of polyoxometalate-ionic liquids (POM-ILs) is presented. This paper is focused on recent developments for true polyoxometalate ionic liquids, where the POM cluster acts as the anionic component in an ionic liquid. A brief overview of the initial development of POM-ILs is given and key features of the materials such as viscosity, conductivity and thermal stability are compared. Current applications of POM-ILs are exemplified and the advantages as well as limitations of POM-ILs for usage as catalysts, sensors and electrochemically active materials are discussed. Potential future areas of application are described and initial studies in these areas are highlighted.

scholarly journals Self Discharge of Magnesium-Sulfur Batteries Leads to Active Material Loss and Poor Shelf Life

2020 ◽  
Author(s):  
Hunter O. Ford ◽  
Emily Doyle ◽  
Peng He ◽  
William C. Boggess ◽  
Jennifer Schaefer
Keyword(s):  
State Of The Art ◽  
Active Material ◽  
The Self ◽  
Focused Attention ◽  
Active Materials ◽  
Related System ◽  
Material Loss ◽  
Research Attention ◽  
Discharge Behavior ◽  
Sulfur Battery

<p>Due to its high theoretical energy density and relative abundancy of active materials, the magnesium-sulfur battery has attracted research attention in recent years. A closely related system, the lithium-sulfur battery, can suffer from serious self-discharge behavior. Until now, the self-discharge of Mg-S has been rarely addressed, and even then only indirectly. Herein, we demonstrate for a wide variety of Mg-S electrolytes and conditions that Mg-S batteries also suffer from serious self-discharge. For a common Mg-S electrolyte, we identify a multi-step self-discharge pathway. Covalent S<sub>8</sub> diffuses to the metal Mg anode and is converted to ionic Mg polysulfide in a non-faradaic reaction. Mg polysulfides in solution are found to be meta-stable, continuing to react and precipitate as solid Mg<sub>y</sub>S<sub>x</sub> species during both storage and active use. Mg-S electrolytes from the early, middle, and state-of-the-art stages of the Mg-S literature are all found to enable the self-discharge. The self discharge behavior is found to decrease first cycle discharge capacity by at least 32 %, and in some cases up to 96 %, indicating this is a phenomenon of the Mg-S chemistry that deserves focused attention.</p>

scholarly journals Self Discharge of Magnesium-Sulfur Batteries Leads to Active Material Loss and Poor Shelf Life

2020 ◽  
Author(s):  
Hunter O. Ford ◽  
Emily Doyle ◽  
Peng He ◽  
William C. Boggess ◽  
Jennifer Schaefer
Keyword(s):  
State Of The Art ◽  
Active Material ◽  
The Self ◽  
Focused Attention ◽  
Active Materials ◽  
Related System ◽  
Material Loss ◽  
Research Attention ◽  
Discharge Behavior ◽  
Sulfur Battery

<p>Due to its high theoretical energy density and relative abundancy of active materials, the magnesium-sulfur battery has attracted research attention in recent years. A closely related system, the lithium-sulfur battery, can suffer from serious self-discharge behavior. Until now, the self-discharge of Mg-S has been rarely addressed, and even then only indirectly. Herein, we demonstrate for a wide variety of Mg-S electrolytes and conditions that Mg-S batteries also suffer from serious self-discharge. For a common Mg-S electrolyte, we identify a multi-step self-discharge pathway. Covalent S<sub>8</sub> diffuses to the metal Mg anode and is converted to ionic Mg polysulfide in a non-faradaic reaction. Mg polysulfides in solution are found to be meta-stable, continuing to react and precipitate as solid Mg<sub>y</sub>S<sub>x</sub> species during both storage and active use. Mg-S electrolytes from the early, middle, and state-of-the-art stages of the Mg-S literature are all found to enable the self-discharge. The self discharge behavior is found to decrease first cycle discharge capacity by at least 32 %, and in some cases up to 96 %, indicating this is a phenomenon of the Mg-S chemistry that deserves focused attention.</p>

scholarly journals Environment-Induced Reversible Modulation of Optical and Electronic Properties of Lead Halide Perovskites and Possible Applications to Sensor Development: A Review

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 705
Author(s):  
Maria Luisa De Giorgi ◽  
Stefania Milanese ◽  
Argyro Klini ◽  
Marco Anni
Keyword(s):  
Electronic Properties ◽  
Optical Sensors ◽  
State Of The Art ◽  
Active Materials ◽  
Long Term Stability ◽  
Current State ◽  
Optical And Electronic Properties ◽  
Halide Perovskites ◽  
Lead Halide

Lead halide perovskites are currently widely investigated as active materials in photonic and optoelectronic devices. While the lack of long term stability actually limits their application to commercial devices, several experiments demonstrated that beyond the irreversible variation of the material properties due to degradation, several possibilities exist to reversibly modulate the perovskite characteristics by acting on the environmental conditions. These results clear the way to possible applications of lead halide perovskites to resistive and optical sensors. In this review we will describe the current state of the art of the comprehension of the environmental effects on the optical and electronic properties of lead halide perovskites, and of the exploitation of these results for the development of perovskite-based sensors.

Practical Picture Processing

1974 ◽  
Vol 32 ◽  
pp. 338-339
Author(s):  
T. A. Welton
Keyword(s):  
Radiation Damage ◽  
Coherence Length ◽  
Spatial Information ◽  
State Of The Art ◽  
Coherent Radiation ◽  
The State ◽  
Energy Spread ◽  
Electron Micrograph ◽  
Picture Processing ◽  
Molecular Skeleton

Various authors have emphasized the spatial information resident in an electron micrograph taken with adequately coherent radiation. In view of the completion of at least one such instrument, this opportunity is taken to summarize the state of the art of processing such micrographs. We use the usual symbols for the aberration coefficients, and supplement these with £ and 6 for the transverse coherence length and the fractional energy spread respectively. He also assume a weak, biologically interesting sample, with principal interest lying in the molecular skeleton remaining after obvious hydrogen loss and other radiation damage has occurred.

A Macintosh Interface for the Cameca Camebax-Micro Electron Microprobe

1990 ◽  
Vol 48 (1) ◽  
pp. 438-439
Author(s):  
Carl E. Henderson
Keyword(s):  
Electron Microprobe ◽  
Processing Speed ◽  
Word Processing ◽  
State Of The Art ◽  
Computer Control ◽  
Third Party ◽  
Disk Storage ◽  
The Past ◽  
User Facility ◽  
Instrument Control

Over the past few years it has become apparent in our multi-user facility that the computer system and software supplied in 1985 with our CAMECA CAMEBAX-MICRO electron microprobe analyzer has the greatest potential for improvement and updating of any component of the instrument. While the standard CAMECA software running on a DEC PDP-11/23+ computer under the RSX-11M operating system can perform almost any task required of the instrument, the commands are not always intuitive and can be difficult to remember for the casual user (of which our laboratory has many). Given the widespread and growing use of other microcomputers (such as PC’s and Macintoshes) by users of the microprobe, the PDP has become the “oddball” and has also fallen behind the state-of-the-art in terms of processing speed and disk storage capabilities. Upgrade paths within products available from DEC are considered to be too expensive for the benefits received. After using a Macintosh for other tasks in the laboratory, such as instrument use and billing records, word processing, and graphics display, its unique and “friendly” user interface suggested an easier-to-use system for computer control of the electron microprobe automation. Specifically a Macintosh IIx was chosen for its capacity for third-party add-on cards used in instrument control.

Current Issues: Advanced Digital Technology for Supervising Graduate Clinicians

2010 ◽  
Vol 20 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Glenn Tellis ◽  
Lori Cimino ◽  
Jennifer Alberti
Keyword(s):  
Real Time ◽  
Digital Technology ◽  
Clinical Training ◽  
State Of The Art ◽  
Clinical Skills ◽  
Slow Motion ◽  
Video Capture ◽  
Microsoft Excel ◽  
Clinical Supervisors ◽  
Training And Supervision

Abstract The purpose of this article is to provide clinical supervisors with information pertaining to state-of-the-art clinic observation technology. We use a novel video-capture technology, the Landro Play Analyzer, to supervise clinical sessions as well as to train students to improve their clinical skills. We can observe four clinical sessions simultaneously from a central observation center. In addition, speech samples can be analyzed in real-time; saved on a CD, DVD, or flash/jump drive; viewed in slow motion; paused; and analyzed with Microsoft Excel. Procedures for applying the technology for clinical training and supervision will be discussed.

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