The Versatility and Flexibility of OLED's Essay
“Scientists at the U.S. Department of Energy's Ames Laboratory, in collaboration with scientists at the University of Michigan, Ann Arbor, have developed and demonstrated a novel, fluorescence-based chemical sensor that is more compact, versatile and less expensive than existing technology of its kind. The new sensor holds promise for myriad potential applications, such as monitoring oxygen, inorganic gases, volatile organic compounds, biochemical compounds, and biological organisms.”(Johnston).
Ames Laboratory has been a driving force in OLED research and finally produced an effective …show more content…
The first part of sensing is placing substance in contact with a thin film above the OLED. The film contains a material that reacts in some way when it comes in contact with the test substance. The thin sensing film’s luminescence (excited by the OLED) is sensitive to the substance of interest. The OLED, powered by a small battery, provides a light source. In the presence of light, the sensing material will luminescence, emitting a specific color, which is affected by the target substance. For instance, the film may glow green normally but with a substance on it, the luminescence could change to blue. A photodetector records the luminescence and transmits the information to the control, processing, and display unit. This makes OLEDs specific to certain substances but given their size and ease of use, the specificity is negligible. (Freudenrich).
One of the biggest advantages of OLEDs is that they give an immediate