Flexible organic light emitting diode (OLED) will be the ultimate display technology to customers and industries in the near future but the challenges are still being unveiled one by one. Thin-film encapsulation (TFE) technology is the most demanding requirement to prevent water and oxygen permeation into flexible OLED devices. As a polymer substrate does not offer the same barrier performance ...

Experimental demonstration of net electro-luminescent cooling in a diode, or equivalently electroluminescence with wall-plug efficiency greater than unity, had eluded direct observation for more than five decades. We review experiments demonstrating light emission from a light-emitting diode in which the electron population is pumped by a combination of electrical work and heat.

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The emerging field of "organic" or "plastic" electronics has brought low-voltage, ultrathin, and energy-efficient lighting and displays to market as organic light-emitting diode (OLED) televisions and displays in cameras and mobile phones. Despite using carbon-based materials as the light-emitting layer, previous efficient organic electronic light-emitting devices have required at least one met...

Regularly patterned InGaN/GaN quantum-well nanorod (NR) light-emitting diode (LED) arrays are grown with MOCVD and characterized with cathodoluminescence and transmission electron microscopy. The dependencies of their morphologies and emission behaviors on the geometry of growth pattern and MOCVD growth condition are investigated. Also, a light-emitting device consisting of such an NR LED array...

Manuscript received September 27, 1999. Manuscript revised October 20, 1999. † The authors are with NTT Cyber Space Laboratories, Musashino-shi, 180-8585 Japan. a) E-mail: [email protected] SUMMARY We studied Si and Mg doping characteristics in cubic GaN and fabricated a light emitting diode of cubic GaN on a GaAs substrate by metalorganic vapor-phase epitaxy. The diode structure con...

The objective is to fabricate organic light emitting diode and to study its degradation process in atmosphere condition in which PFO as an emitting material and PEDOT:PSS as a hole injecting material were used on ITO substrate. Thus degradation process of the OLED was studied upon its current-voltage characteristic. By fabricating this OLED and obtaining blue light and analysis of current-volta...