Organic Light Emitting Diodes Sensors

Organic Light Emitting Diodes (Hardcover) $385.4 Addressing the development of the organic light emitting diode (OLED) based on rare-earth and transition-metal complexes—Europium, Terbium, Ruthenium, and Rhenium—this unique perspective explains how these materials can be used to build organic-LEDs, from chemistry synthesis to device operation and the related charge transfer and confinement. Examining how organic materials can be used to build organic-LEDs, the relationship between the chemistry molecule "design," and state-of-the-art and expected pathways, this intelligent report provides intensive experimental results for scientists and engineers working in this new OLED framework, while maintaining a didactic utility for graduation students and teachers studying optoelectronics.

Electroluminescence in Organic Light-emitting Diodes $80.93 No Synopsis Available

Organic Light-Emitting Diodes: Principles, Characteristics & Processes $233.95 No Synopsis Available

Light-Emitting Diodes (Hardcover) $186.1 Revised and fully up-dated, the second edition of this graduate textbook offers a comprehensive explanation of the technology and physics of LEDs such as infrared, visible-spectrum, ultraviolet, and white LEDs made from III-V semiconductors. Elementary properties such as electrical and optical characteristics are reviewed, followed by the analysis of advanced device structures. With nine additional chapters, the treatment of LEDs has been vastly expanded, including new material on device packaging, reflectors, UV LEDs, III-V nitride materials, solid-state sources for illumination applications, and junction temperature. Radiative and non-radiative recombination dynamics, methods for improving light extraction, high-efficiency and high-power device designs, white-light emitters with wavelength-converting phosphor materials, optical reflectors, and spontaneous recombination in resonant-cavity structures are discussed in detail. With exercises, solutions, and illustrative examples, this textbook will be of interest to scientists and engineers working on LEDs and graduate students in electrical engineering, applied physics, and materials science.

Light-Emitting Diodes $87.75 No Synopsis Available

Organic Light Emitting Diodes : The Use of Rare Earth and Transition Metals $146.2 No Synopsis Available

Polymer Light Emitting Diodes Based on Polyfluorenes $138.61 This work is devoted to the study on Polymer Light Emitting Diodes (PLEDs) based on polyfluorenes, a promising class of semiconductive polymers for lightemitting diode applications. It covers theories of PLEDs, literature overview of polyfluorenebased lightemitting diodes, as well as research results by the authors. In this study, several types of PLED devices based on neat polyfluorenes or polyfluorene blends were designed, fabricated, and characterized. The electrical characteristics of two neat polyfluorenes were simulated via using space charge limited current theory for the holeonly case and/or exploiting a commercial software package. Author: Zhang, Qiushu/ Zivanovic, Sandra Binding Type: Paperback Number of Pages: 164 Publication Date: 2010/08/16 Language: English Dimensions: 5.98 x 9.01 x 0.37 inches

Light-emitting Diodes and Optoelectronics (Hardcover) $369.61 Description not available.

CarbazoleBased Emitting Compounds $141.79 Carbazole is a heterocyclic tricyclic aromatic organic compound consisting of two sixmembered benzene rings fused on either side of a fivemembered nitrogencontaining ring. A large number of carbazole derivatives have been designed and synthesized and organic electronic devices based on these derivatives such as organic light emitting diodes (OLEDs), have been investigated. The optical and electrical properties of carbazoles are affected by substitution on the 2, 3, 6, 7 and 9Hpositions. Many carbazole derivatives have sufficiently high triplet energy to make them an efficient host where they can serve as red, green, or blue triplet emitters. Highly fluorescent and stable carbazolebased compounds were synthesized and characterized. Substitution of carbazoles at 3 and 6 position by tertbutyl group enhanced the solubility. Suitably susbtituted carbazoles form highly stable fluorescent organic nanoparticles. The emission of these nanoparticles was reversibly switched on/off in the bluegreen and orangered regions from a change in the ratio of the tetrahydrofuran/water system used in their preparation. Author: Adhikari, Ravi/ Neckers, Dr Douglas C. Binding Type: Paperback Number of Pages: 192 Publication Date: 2010/05/05 Language: English Dimensions: 5.98 x 9.01 x 0.44 inches

Fundamentals of High-Efficiency OLEDS: Basic Science to Manufacturing of Organic Light-Emitting Diodes $126.7 No Synopsis Available

Blue Laser and Light Emitting Diodes II $95.55 No Synopsis Available

Organic LightEmitting Diodes $113.11 Organic lightemitting diode (OLED) technology is used in a variety of display applications, ranging from cell phones and MP3 to prototype TVs, and holds great promise for the production of highly efficient largearea light sources and flat panel displays. It has the potential to become a multibilliondollar industry within a few years. The biggest technical challenge for OLEDs is the limited lifetime associated with elevated temperatures and exposure to moisture. The guaranteed hours of operation (15,000 hr) is currently inadequate for most TVs and replacement of LCDs with the 60,000 hr halflife. This book, therefore, investigated the thermalactivated and moistureinduced degradation pathways of small molecule based prototype OLEDs as well as interfacial electronic properties at the nanoscale level through realtime visualization. The results should help shed some lights on improving luminescence efficiency and lifetime of OLEDs, and should be especially useful to professionals in research and development of not only OLED technology but other organic electronics, or anyone else who may be interested in plastic electronics. Author: Xu, Mingsheng Binding Type: Paperback Number of Pages: 148 Publication Date: 2010/06/04 Language: English Dimensions: 5.98 x 9.01 x 0.34 inches

Introduction to Nitride Semiconductor Blue Lasers and Light Emitting Diodes $204.7 No Synopsis Available

Advances in Organic Light-Emitting Device $113.1 No Synopsis Available

Organic Light-Emitting Devices : A Survey $130.65 No Synopsis Available

Organic Light-emitting Materials And Devices $175.45 No Synopsis Available

Account limit of 2104 requests per hour exceeded.

Synched Up Show: Digital Experience 2009

DC Building Power: Economic Factors, Application Drivers, Architecture/Technology, Standards and Regulatory Developments

The DC building power market is projected to grow significantly over the next several years, and among the driving forces is the need to improve efficiency and reduce electricity costs in several areas. According to the US Environmental Protection Agency (EPA), in 2006, data centers and servers in the United States accounted for approximately 1.5% of the nation's total electricity consumption. To put this in perspective, the EPA stated that this total exceeded the electricity consumed by the entire nation's color televisions, and is similar to the amount of electricity consumed by approximately 5.8 million average TV households. In addition, energy consumption in data centers in the US is projected to continue to grow, and double every five years.

Traditionally, large data centers and telecommunications facilities have consumed large amounts of electricity without much regard for energy efficiency. Due to the continuous need for energy production, it has been an acceptable practice to trade off energy efficiency and operating costs for the sake of system reliability. However, in recent years a number of factors have emerged that may change that practice. Now, a debate is taking place on how to cope with the growing need for electricity to power these facilities. Data center managers and other data center professionals are looking to dc power as an alternative solution to traditional ac power. Proponents of dc power claim that it has the potential to eliminate the biggest sources of energy loss and waste in traditional ac systems: the multiple back and forth transformations and conditioning needed to step voltage down for use by IT equipment.

One of the pressing needs for the further expansion of dc power was the establishment of dc voltage standards. In light of this need, two new dc power distribution standards for facilities were developed over the past year, one for high-voltage (380Vdc) applications and another for low-voltage (24Vdc) applications. The development of theses standards is significant and is expected to contribute to the further expansion of dc power. The 380Vdc standard was developed by the Electric Power Research Institute (EPRI) along with Lawrence Berkeley National Laboratories and is designed for data centers and other critical facilities. EPRI has developed the first dc voltage tolerance envelope plotting voltage variations versus time for 380-Vdc powered equipment. The new dc voltage tolerance envelope provides the technical details of the electrical operating environment, including allowable voltage surges and sags that could enable engineers to design power converters for use with 380-Vdc distribution systems for next-generation data center equipment.

The 24Vdc standard was developed by EMerge and is expected to play an important role in the expansion of dc power in commercial, industrial and residential buildings. The new EMerge Alliance standard is described as the first roadmap for the utilization of safe, low-voltage direct current power in commercial interiors. The EMerge Alliance Standard 1.0 establishes a more efficient means of powering the rapidly increasing number of digital, dc-powered devices, such as sensors, lighting and IT equipment found in today's workplaces. It creates an integrated, open platform for power, interior infrastructures, controls and a wide variety of peripheral devices to facilitate the hybrid use of ac and dc power within buildings.

As the emergence of the EMerge Alliance standard suggests, dc power can be used to improve efficiency at the lower-voltage levels. The addition of dc power delivery systems to homes, office building and commercial facilities offers the potential for significant improvements in energy delivery efficiency, reliability, power quality and cost of operation. Most of these facilities are currently dominated by fixed overhead lighting, and a variety of electrical devices that are typically wired for the building's lifetime rather than the occupant or residents evolving needs.  In fact, although opportunities exist in both new installations and retrofits, according to the EMerge Alliance, 80% of the market opportunities are in the updating and retrofitting of commercial buildings. Actually, the ability to distribute low-voltage dc power within common infrastructures is already present in most commercial interiors

Lighting presents one of the major opportunities for the further development of dc power. According to a recent study funded by the U.S. Department of Energys Energy Efficiency and Renewable Energy Office (DOE EERE), lighting accounts for 22% of all electricity consumed in the United States. Commercial businesses consume 20% to 30% of their total energy just for lighting. And, 50% or more of that lighting-related energy may be wasted by obsolete equipment, inadequate maintenance or inefficient use. Upgrading lighting systems is one of the best energy efficiency investments available to a commercial facility. Since linear fluorescent light accounts for the majority of a commercial building's lighting energy use, improving the efficiency of these systems can save significant amounts of energy and money.

In addition to advances in dc power for data centers, new advances in solid-state lighting (SSL) are among the market forces expected to drive the dc power market over the next several years. The era SSL will be arriving soon, primarily powered by ultra-high-efficiency light emitting diodes (LEDs) and to a lesser extent by organic light emitting diodes (OLEDs). Used in large high-definition signs, architectural lighting, stadiums, billboards and other applications, modern LEDs represent the latest lighting devices based on dc power.  In fact, current economic conditions are just right for the emerging LED replacement market. Several factors cited for this include "dramatic" improvements in commercially available LED performance, significant cost reduction, government regulations, and energy savings.

Other applications contributing to the advancement of dc power include common consumer electronics devices, which operate on dc power and require conversion from dc sources. These devices are common in every household and include televisions, computers, set top boxes and many others. (All microprocessors require direct current and many devices operate on direct power because it can be precisely regulated for sensitive components.) In fact, many of the smaller electronic devices such as mobile phones, notebook computers and personal digital assistants (PDAs) use ac-dc adapters, which also result in power loss during conversion. In aggregate, the millions of ac-dc conversions performed for the operation of these electronic devices extract a huge loss in energy during conversion.

In addition to the applications and trends driving the industry, the market for dc power is strongly influenced by a number of technological and regulatory factors. These factors vary from application to application and represent both opportunities and threats. They include the growth of dc power used in alternative energy systems, the availability of UL rated equipment and experienced personnel, the further development of both UPS technology, the expansion and development of a number of organizations and alliances the already-mentioned importance of increased efficiency and the further development of regulatory standards and policies.

Among the areas examined in this report are the technology and architecture trends affecting the industry, as well as a thorough discussion of new and emerging products and materials, potential threats and the latest regulatory developments and standards. Over 35 tables are presented depicting a variety of power system schematics and comparisons, architectural standards, product introductions, packaging solutions, efficiency standards and other relevant information. The focus of this comprehensive analysis provides decision makers with an insightful look into the current and future opportunities and threats available in the dc building power supply market.

For more information on the report, kindly visit :
http://www.visionshopsters.com/product/2212/DC-Building-Power-Economic-Factors-Application-Drivers-Architecture-Technology-Standards-and-Regulatory-Developments.html

----------------------------------------------

About the Author

VisionShopsters.com specializes in providing comprehensive collection of online market research reports, conference/events/seminars bookings, country reports, company profiles, latest books and magazines, customized research services offering informative solutions worldwide.