Nanostructured Organic Light-emitting Diodes with Electronic Doping, Transparent Carbon Nanotube Charge Injectors, and Quantum Dots
Author: Christopher D. Williams
Publisher:
Published: 2006
Total Pages: 232
ISBN-13:
DOWNLOAD EBOOKIn this dissertation, we discuss several new methods and procedures which we have developed and used to produce OLEDs and PLEDs. More specifically these are electronic doping of transport layers, fluorescent doping of emissive layers by semiconductor nanocrystals (NC) (also known as quantum dots (QD)), and electrode engineering, namely by the use of transparent carbon nanotube sheets as charge injectors. We expand on the existing field of molecular doping and introduce a doped device with a very thick hole transport layer. Such a device is more resistant to failure due to excessive current density. We also investigate the effects of the presence of dopant molecules in the emissive layer of a multilayer OLED. This portion of the work introduces the negative effects of electronic doping at high concentrations, when the dopant molecules are able to diffuse into the emissive layer and quench luminescence by various processes.