Characterization of Organic and Inorganic Optoelectronic Semiconductor Devices Using Advanced Spectroscopic Methods

In this thesis, advanced spectroscopy methods are discussed and applied to gain understanding of the physical properties of organic conjugated molecules, II-VI thin film semiconductors, and vertical cavity surface emitting lasers (VCSEL). Experiments include single photon and two-photon excitation with lasers, with subsequent measurements of the absorption and photoluminescence, as well as photocurrent measurements using tungsten and xenon lamps, measuring the direct current and the alternating current of the devices. The materials are investigated in dissolved form (conjugated polymers), thin films (polymers, II-VI semiconductors), and complex layer structures (hybrid device, VCSEL). The experiments are analyzed and interpreted by newly developed or applied theories for two-photon saturation processes in semiconductors, bandgap shrinkage due to optically induced electron hole pairs, and the principle of detailed balance to describe the photoluminescence in thin film cadmium sulfide.

Name thesis:degree_name

Ph. D.

Level thesis:degree_level

doctoral

Discipline thesis:degree_discipline

Physics

Department dc:contributor.department

Physics

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2001

Author dc:creator

• Schroeder, Raoul

Chairs dc:contributor.committeechair

• Ullrich, Bruno R.
• Heflin, James R.

Committee members dc:contributor.committeemember

• Graupner, Wilhelm
• Indebetouw, Guy J.
• Davis, Richey M.
• Ficenec, John R.

• Semiconductors
• Two-Photon Absorption
• Ultrashort Laser Pulses
• Conjugated Polymers
• Spectroscopy
• Cadmium Sulfide

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

etd-01072002-094801

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/25957