Exciton funneling in light-harvesting organic semiconductor microcrystals for wavelength-tunable lasers

Organic solid-state lasers are essential for various photonic applications, yet current-driven lasing remains a great challenge. Charge transfer (CT) complexes formed with p-/n-type organic semiconductors show great potential in electrically pumped lasers, but it is still difficult to achieve population inversion owing to substantial nonradiative loss from delocalized CT states. Here, we demonstrate the lasing action of CT complexes based on exciton funneling in p-type organic microcrystals with n-type doping. The CT complexes with narrow bandgap were locally formed and surrounded by the hosts with high-lying energy levels, which behave as artificial light-harvesting systems. Excitation light energy captured by the hosts was delivered to the CT complexes, functioning as exciton funnels to benefit lasing actions. The lasing wavelength of such composite microcrystals was further modulated by varying the degree of CT. The results offer a comprehensive understanding of exciton funneling in light-harvesting systems for the development of high-performance organic lasing devices. Organic semiconductor lasers that can deliver intense coherent light across the full visible spectrum have ...

In my introduction to Slant’s list of the 100 Best Albums of the 1990s, I described

In my introduction to Slant’s list of the 100 Best Albums of the 1990s, I described nostalgia for the decade as “an idealized vision of a time when Bill Clinton was the fresh, young Democrat on the block, beepers were the hottest new tech items, and every major record label and Top 40 radio station was scrambling to discover the next big alternative to run-of-the-mill pop.” I went on to lament: “It’s human nature to look back on things with irrational fondness and nostalgia, overlooking the bad and romanticizing the good. But while the ‘90s had its fair share of ’crap,’ it’s hard to deny that the ’good’ was exceptionally good.” So good, in fact, that we decided to dust off our lovingly curated list of over 400 albums to compile individual Top 10s for each year of the ‘90s. Many of these titles are already widely—and rightfully—celebrated, but these lists also give us the opportunity to honor some typically overlooked gems. Sal Cinquemani Honorable Mention: Herbert, Around the House; Garbage, Version 2.0; Portishead, Roseland NYC Live; Beastie Boys, Hello Nasty; Alanis Morissette, Supposed Former Infatuation Junkie; Black Star, Mos Def & Talib Kweli Are Black Star; Lucinda Wi...

11 Best Lacrosse Goals for Backyard Practice (2019)

When researching the best lacrosse goals, what features are most important to you? Ability to use it for backyard practice? Durability? Performance? Good value? If any of those are on your pros list, then you’re in luck because we’ve compiled a list below of some of the most popular and effective nets available on the market today. All of the goals are regulation size (6 feet by 6 feet) and can be used to practice your shots and/or goalkeeping in the convenience of your backyard, or wherever you want to play. And if you want to make sure you have all the training equipment you need, check out our post on the best lacrosse rebounders so you can work on your passing and accuracy as well as fielding returns for line drives, high pops, and grounders. The EZGoal Lacrosse Goal is regulation size (6 feet by 6 feet), but folds up conveniently for compact flat storage, making it ideal for backyards.  The frame is made of 1.5 inch powder coated 17 gauge steel, which helps with stability during play. The net is reinforced heavyweight polypropylene that’s treated with UV protection so it’ll last through all the outdoor elements. In fact, the net is covered by a lifetime warranty. And this g...

Home of Week: For $799K in Framingham, an open, sleek Colonial

$799,000Style: ColonialYear built: 2019Square feet: 3,900Bedrooms: 4Baths: 3 fullSewer/water: PublicTaxes: $10,500 (estimated) With its black trim, contrasting white stucco, and metal overhangs, this newly built four-bedroom home puts a modern twist on the ubiquitous Colonial style. A short curving walkway ends at a porch with a pitched roof held up by three square columns, and the front door reveals an open floor plan comprising the kitchen and living and dining areas. But this area has a spacious difference: The first-floor ceiling ends in the right-hand corner. Instead, the space features a 17-foot high cathedral ceiling cast in the sunshine from two tiers of double-hung windows. In lieu of a chandelier, the ceiling hosts an industrial-size fan, 8 feet wide, with narrow blades, creating a dramatic visual. To the left of the front door is the kitchen, which offers a peninsula with a waterfall quartz counter and seating for four, a glass-tile backsplash, recessed lighting, and stainless-steel appliances, including a gas stove and a wine refrigerator. The rectangular framing on the white cabinetry mimics the picture-frame wainscot found here and throughout the home. The dining a...

Also called reflective vests, the best safety vests are commonly found in the police force and

Also called reflective vests, the best safety vests are commonly found in the police force and fire departments. You can also see them being used and worn by construction workers. However, take note that no matter what type of job you do, a high-quality safety vest contributes a lot to keep you safe in the work environment. If you are part of the construction industry, for instance, then a reliable constructions safety vest can help protect you from harm regardless of how active your job is at times. Note that pressing deadlines in this industry might cause you to become too active, making you more prone or vulnerable to accidents. With the aid of a good safety or reflective vest with pockets, you can alert those around you about your presence. While wearing the safety vest alone can’t completely prevent accidents, your use of its reflective materials helps ensure that those around you will not be too careless when maneuvering or working with you around. To ensure that you will be able to take full advantage of a high-quality and heavy-duty safety vest, make sure to choose on that adheres to the regulations and standards set by the ANSI and OSHA. The color should also be distinc...

Feast your eyes on this stunning concept video showing Samsung’s Galaxy S11 series

December is a fallow point of the year for mobile hardware, when new releases basically all but disappear until after the holiday shopping craze and ramp up with the arrival of CES, Samsung’s next flagship launch, and then MWC a short time after that. But that doesn’t mean this month isn’t nevertheless a busy one when it comes to news, leaks, and rumors about all the mobile gadgets that are just around the corner — with this mid-December point proving to be especially chock-a-block full of Galaxy S11 rumors. Prolific leaker Ice Universe (@UniverseIce), for example, is pointing to February 18 as the possible date for Samsung’s Galaxy S11 launch event, to be reportedly held in San Francisco and at which it will also launch a new series of clamshell foldable phones. Meantime, Dutch tech news blog LetsGoDigital is out with a new series of 3D renders and video animation showcasing the forthcoming S11 line in all its glory, including the S11e, S11 and S11 Plus, which you can check out above. Highlights: Samsung’s new flagship series is expected to hit stores a few weeks after its reveal (making for presumably a March 2020 release date). We’ll also have various S11 5G models this time...

Global Miniature Circuit Breakers (MCB) Market Customer Service Facility 2019: Schneider Electric, Rockwell Automation, ABB Group, Siemens, Eaton

The worldwide Miniature Circuit Breakers (MCB) market is one of the most segmented and developing markets. This Miniature Circuit Breakers (MCB) market has been growing at a considerable speed with increasing consumer preference and the development of new methods. The Miniature Circuit Breakers (MCB) market provides various growth chances and is a broad field for competitors (Schneider Electric, Rockwell Automation, ABB Group, Siemens, Eaton, Max Group, Hitachi Industrial Equipment, AGE Technologies, Mitsubishi Electric, Fuji Electric, Altech, SENTAI, Greegoo, ASI-Automation Systems Interconnect, Cutler Hammer, Div of Eaton Corp, GE – General Electric, Klockner-Moeller, Lovato, MARS, WEG Electric, Meba Electric). The Miniature Circuit Breakers (MCB) market is the foundation of the global growth aspects and prospects since the development of specific concept requires various tech-supported methodologies, ideas, and theories. The global market report has common restrictions, competent parameters, and a detailed clarification of the extraordinary data along with the examined current and future trends that may impact the growth. The Miniature Circuit Breakers (MCB) market report sho...

The BlueWave LED DX-1000 can be configured to operate as either a small-area flood or spot-cure

The BlueWave LED DX-1000 can be configured to operate as either a small-area flood or spot-cure system. In flood mode, the system delivers up to 1 watt per cubic centimeter over a 1-by-1.5-inch area. Photo courtesy Dymax The LED Cube 100 chamber from Honle AG is available in wavelengths of 365, 385, 395 and 405 nanometers, It has a maximum irradiation intensity of up to 1 watt per cubic centimeter. Photo courtesy Honle AG The curing section of the OmniCure CV300 conveyor system features a center opening, into which is placed the OmniCure AC7150 or AC7300 LED light array. Travel speed of the system’s fiberglass belt is 3 to 48 feet per minute. Photo courtesy Lumen Dynamics Inc. Consider, for example, their excitement nearly 15 years ago when suppliers of LEDs promised that this light source could cure UV adhesives more cost effectively than traditional bulbs (mercury arc, metal-halide, electrodeless). Manufacturers were also told that LEDs last longer, generate less heat and can be used in more flexible configurations than bulbs. This extensive list of benefits convinced many companies to replace their bulbs with LEDs. But there was an unforeseen problem. “An LED produces light i...

China Geared motor 12v stable performance dc gear motor mini gear motor for medical product on Global Sources

We use cookies to give you the best possible experience on our website. For more details including how to change your cookie settings, please read our Cookie Policy. Path: All Categories >> Electronic Components >> Electromechanical Components >> Motors & Mechanisms >> Geared motors – Update me on new products View latest products We’ve sent a confirmation e-mail to XXX@gmail.com. Click on the link in the e-mail to activate and start receiving free alerts when new products are posted! Take the next step in your sourcing journey with Global Sources. From now until December 31, 2019, for every US$100 worth of sample orders you make on GlobalSources.com, you’ll receive a US$20 Amazon.com Gift Card*, our way of helping you towards your next million-dollar product. 21 years’ motor design and production experience.90 million-piece annual capacity.Auto motors are almost entirely produced on automated linesFacilities certified to IAFT16949:2016,ISO 9001:2008 and ISO 14001:2004Advanced equipment from Sodick, Hexagon,Mitutoyo, Magtrol and Votsch10% sales revenue invested in R&D and automatic equipment every yearRejet rate: auto motors < 30PPM;g...

Global Contemporary Height-adjustable Desk (Contemporary Height Adjustable Desk) Market Analysis 2019 Trends, Rising Growth, New Project Investment and Forecast 2024

The research document published on Global Contemporary Height-adjustable Desk (Contemporary Height Adjustable Desk) Market is analyzed with industry experts in mind to maximize return on investment by providing clear evidence needed for Swell-versed business decisions. This research will help both established and new entrants to identify and analyze market needs, market size, and competition. It explains the supply and demand situation, the competitive scenario, and the challenges for market evolution, market openings and the threats faced by major players of Contemporary Height-adjustable Desk (Contemporary Height Adjustable Desk) industry. This research report represents a 360-degree summary of the competitive landscape of the Global Contemporary Height-adjustable Desk (Contemporary Height Adjustable Desk) Market. Furthermore, it offers massive data relating to recent trends, technological advancements, tools, and methodologies. The research report analyzes the Global Contemporary Height-adjustable Desk (Contemporary Height Adjustable Desk) Market in a detailed and concise manner for better insights into the businesses. Ask for Sample Copy of This Report: https://vertexmarketi...

Understanding the molecular mechanism of pulse current charging for stable lithium-metal batteries

High energy and safe electrochemical storage are critical components in multiple emerging fields of technologies. Rechargeable lithium-metal batteries are considered to be promising alternatives for current lithium-ion batteries, leading to as much as a 10-fold improvement in anode storage capacity (from 372 to 3860 mAh g−1). One of the major challenges for commercializing lithium-metal batteries is the reliability and safety issue, which is often associated with uneven lithium electrodeposition (lithium dendrites) during the charging stage of the battery cycling process. We report that stable lithium-metal batteries can be achieved by simply charging cells with square-wave pulse current. We investigated the effects of charging period and frequency as well as the mechanisms that govern this process at the molecular level. Molecular simulations were performed to study the diffusion and the solvation structure of lithium cations (Li+) in bulk electrolyte. The model predicts that loose association between cations and anions can enhance the transport of Li+ and eventually stabilize the lithium electrodeposition. We also performed galvanostatic measurements to evaluate the cycling be...

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