MIT Electrical Engineering and Computer Science EECS Event

Energy and Charge Transport in Amorphous Organic Materials

Marc Baldo
Princeton University

Monday, March 12, 2001
4:00 PM (refreshments 3:45)
Grier Room, Room 34-401B
EECS Special Seminar

Abstract

SPECIAL SEMINAR

Energy and Charge Transport in Amorphous Organic Materials ~~~ Marc Baldo Princeton University

Monday, March 12, 2001, 3:45 pm - 5 pm

(Refreshments at 3:45 pm, Talk at 4:00 pm)

Grier Room 34-401B

Although organic device technology for light emitting devices and transistors has progressed remarkably in recent years, many of the fundamental optical and electronic properties of amorphous organic materials remain obscure. In this talk, we will firstly consider microscopic processes in small-molecular materials: in particular, the molecular physics underlying exciton energy transfer and exciton luminescence efficiency. Two techniques that generate high luminous efficiencies in organic light emitting devices will be discussed, high efficiency phosphores-cence and sensitized fluorescence. In the final part of the talk, we will extend our study to the macroscopic process of charge transport and injection in amorphous organic semiconductors. A new model will be proposed that includes disorder at the metal/organic injection contact. The temperature and thickness dependencies of the model will be tested for a variety of metal/organic interfaces.