Light Emitting Diode

who produce light-emitting diode (LED)?

Inorganic LED's are very cheap to manufacture and many large to small companies are making them.

Organic LED's however are restricted to research labs and few big industry names. Sony recently released their really cool display based on OLEDS. It's on Youtube, find it out.

Hope this helps

LightEmitting Diode $68.51 Light emitting diode. Oleg Losev, List of LED failure modes, Organic light emitting diode, Miniature light emitting diode, Solid state lighting, LED lamp, LED power sources, Electrical polarity of LEDs, LED circuit, LED as light sensor Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 74 Publication Date: 2009/10/08 Language: English Dimensions: 5.98 x 9.01 x 0.17 inches

Introduction to Light Emitting Diode Technology and Applications $71.13 No Synopsis Available

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.

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

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Light-Emitting Diode Pioneers : Nick Holonyak, Isamu Akasaki, Oleg Losev, H. J. Round, Shuji Nakamura $7.7 No Synopsis Available

Light-Emitting Diode Manufacturers : Philips Lumileds Lighting Company, Osram Opto Semiconductors Gmbh, Neopac, Cree Inc. , Nichia Corporation $8.81 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 Silicon for Microphotonics $380.76 A fascinating insight into the stateoftheart in silicon microphotonics and on what we can expect in the near future. The book presents an overview of the current understanding of getting light from silicon. It concentrates mainly on low dimensional silicon structures, like quantum dots, wires and wells, but covers also alternative approaches like porous silicon and the doping of silicon with rareearths. The emphasis is on the experimental and theoretical achievements concerning the optoelectronic properties of confined silicon structures obtained during recent years. Silicon based photonic crystals are in particular considered. An in depth discussion of the route towards a silicon laser is presented. Author: Ossicini, Stephano/ Ossicini, S./ Pavesi, L. Series Title: Springer Tracts in Modern Physics (Hardcover) Series Number: 194 Binding Type: Hardcover Number of Pages: 294 Publication Date: 2004/01/12 Language: English Dimensions: 9.21 x 6.14 x 0.69 inches

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Advances in Light Emitting Materials $224.25 No Synopsis 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

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

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

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

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BlueChaos vs Dickey - Light Emitting Diode G

a source voltage of 0.8V, determine the current in a 50mW LED(light emitting diode)?

Assuning a source Voltge of 0.8V, Determing the curretn in a 50mW LED(Light emitting diode)

If anyone can solve this, can you please explain any formula used to solve alonge with the answer?
THank you

Well we are given voltage, and power. We are asked to find the current. Well the formula we have to use here is P=VI.
Rearranging this formula we get; I=P/V

However; there is only one thing wrong with this problem.
We do not know what the voltage is correctly.
If this diode is a ideal diode. An ideal diode acts like a short circuit with no voltage drop across it. Then we would use .8V as the Voltage Source across the diode.
Ideal Diode:
I = .05 W/.8V
I = 62.5mA

If it is not an ideal diode and there is a .75V drop across the diode then we would use .05V as the Voltage Source across the diode.
I = .05W / (.8V - .75Vdiode drop)
I = .05W / (.05V)
I = 1A

Here this might give your more information!

http://en.wikipedia.org/wiki/Diode_modelling