Title page for ETD etd-01072002-094801

Type of Document Dissertation
Author Schroeder, Raoul
Author's Email Address raoul@kottan-labs.bgsu.edu
URN etd-01072002-094801
Title Characterization of Organic and Inorganic Optoelectronic Semiconductor Devices Using Advanced Spectroscopic Methods
Degree PhD
Department Physics
Advisory Committee
Advisor Name Title
Heflin, James R. Committee Co-Chair
Ullrich, Bruno R. Committee Co-Chair
Davis, Richey M. Committee Member
Ficenec, John R. Committee Member
Graupner, Wilhelm Committee Member
Indebetouw, Guy J. Committee Member
  • Semiconductors
  • Two-Photon Absorption
  • Ultrashort Laser Pulses
  • Conjugated Polymers
  • Spectroscopy
  • Cadmium Sulfide
Date of Defense 2001-12-14
Availability unrestricted
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.
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