American Journal of Engineering Research (AJER) 2015 American Journal of Engineering Research (AJER) e-ISSN: 2320-0847 p-ISSN : 2320-0936 Volume-4, Issue-9, pp-153-159 www.ajer.org Research Paper Open Access www.ajer.org Page 153 ORGANIC LIGHT EMITTING DIODE (OLED) Aririguzo Marvis Ijeaku 1 , Madu Hilary Chidubem 2 , Emerole Kelechi Chukwunonyerem 3 , Nwogu Uchenna Obioma 4 1,2,3,4 (Department of Electrical and Electronics Engineering, Federal Polytechnic Nekede, Owerri, Imo State, Nigeria) ABSTRACT : An Organic Light Emitting Diode (OLED) is a device composed of an organic layer that emits lights in response to an electrical current. Organic light emitting diodes have advanced tremendously over the past decades. The different manufacturing processes of the OLED itself to several advantages over flat panel displays made with LCD technology which includes its light weight and flexible plastic substrates, wider viewing angles, improved brightness, better power efficiency and quicker response time. However, its drawbacks include shorter life span, poor color balance, poor outdoor performance, susceptibility to water damage etc.The application of OLEDs in electronics is on the increase on daily basics from cameras to cell phones to OLED televisions, etc. Although OLEDs provides prospects for thinner, smarter, lighter and ultra- flexible electronics displays, however, due to high cost of manufacturing, it is not yet widely used. Keywords - Electronic, Display, Devices, Lifetime, Application I. INTRODUCTION Do you remember old-style Television set powered by cathode-ray tubes (CRTs)? The biggest ones were about 30–60cm (1–2ft) deep and almost too heavy to lift by you. If you think that's bad, you should have seen what TVs were like in the 1940s. The CRTs inside were so long that they had to stand upright firing their picture toward the ceiling, with a little mirror at the top to bend it sideways into the room. Watching TV in those days was a bit like staring down the periscope of a submarine! Thank goodness for progress. Now most of us have computers and TVs with LCD screens, which are thin enough to mount on a wall, and displays light enough to build into portable gadgets like cell phones. If you think that's good, wait till you see the next generation of displays made using OLED (organic light-emitting diode) technology. They're super-light, almost paper-thin, theoretically flexible enough to print onto clothing, and they produce a brighter and more colorful picture. What are they and how do they work? Let's take a closer look! The purpose of this research work is to explore the ground-breaking technology of the OLED. The following are the specific objectives: i. How an OLED works ii. Types of OLEDs iii. Advantages and disadvantages of OLEDs iv. Current and future OLED applications This work discusses the Organic Light Emitting Diode (OLED) with interest on how it works its material properties, its prospects, limitations and application areas. This work is intended to showcase the groundbreaking technological success in the electronics display world, in this masterpiece called the OLED. This research is also intended to supply sufficient information to students in their choice of electronic display for their electronics projects. Similarly, electronics engineers/technicians and mainstream display manufacturers, with the information in this research work could consider employing the use of OLEDs in their displays by taking advantage of all its jaw-sagging features.