Investigation of Heterojunctions and Multiple Quantum Well Structures Using Crystalline Organic Semiconductors
Abstract
A new class of engineered materials based on crystalline organic semiconductors grown by the ultrahigh vacuum process of organic molecular beam deposition is described. The objective of this program is to investigate these materials and the conditions which lead to ordered growth between highly lattice mismatched van der Waals crystals into novel 'quasi-epitaxial' structures. During the first year of the program, considerable progress has been made in understanding and exploiting this new class of materials. In particular, a simple model has been developed which describes the physical mechanisms underlying quasi-epitaxy. The electrical and optical properties of both single and multiple heterojunction structures grown using alternating layers of two different, lattice-mismatched organic molecules have been investigated in detail. It is found that the layers can be grown sufficiently thin (10 A) to result in exciton confinement in organic multiple quantum wells. These and other quasi-epitaxially grown structures can load to an entirely new family of optoelectronic devices with exciting new electronic and nonlinear optical characteristics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 12, 1993
- Accession Number
- ADA272113
Entities
People
- Stephen R. Forrest
Organizations
- University of Southern California