Organic light emitting devices (OLEDs) and structurally integrated photoluminescence based chemical and biological sensors excited by OLEDs

摘要

OLED constitute a new and exciting emissive display technology. In general, the basic OLED structure consists of a stack of fluorescent organic layers sandwiched between a transparent conducting anode and metallic cathode. In this work, extensive research is done to study the decay mechanism at different temperatures for a blue OLED. We conclude that the main decay process is governed by three types of recombination-exciton decay, charge pair recombination and uncorrelated carrier recombination. All these processes have been studied and successfully modeled.;The study of biosensor is very important for healthcare and to counteract bioterrorism. OLED-based biosensor is a new field and three new kinds of sensors have been successfully developed in this work. Integration of the OLED with the sensing element resulted in the first completely integrated biosensor for oxygen and glucose. The developed device is very compact, lightweight and the highest sensitive of its kind.;Using the FRET technology, a novel anthrax sensor has been developed. Using a synthesized peptide, anthrax lethal factor has been successfully detected. The sensitivity of these sensors are adequate to determine presence of anthrax in any environment.