Optical and Magnetic Resonance Characterization of Donors and Acceptors in Zinc Oxide (DEPSCoR)

This is the final report for a three-year project to identify and characterize donors and acceptors in single crystals of ZnO. Samples were obtained from our industrial partner (Eagle-Picher) and from the Air Force Research Laboratory (Hanscom AFB). The experimental techniques used to characterize t...

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Bibliographic Details
Main Authors: Halliburton, Larry E, Giles, Nancy C
Format: Report
Language:English
Subjects:
ABSORPTION
AIR FORCE RESEARCH
COPPER
DONORS(MEDICINE)
Electrical and Electronic Equipment
ELECTRON ACCEPTORS
ELECTRON NUCLEAR DOUBLE RESONANCE
ELECTRON PARAMAGNETIC RESONANCE
ELECTROOPTICS
EMITTERS
FREE ENERGY
HALL EFFECT
HIGH TEMPERATURE
HYDROGEN
INFRARED ABSORPTION
Inorganic Chemistry
IONIZATION
LITHIUM
MAGNETIC RESONANCE
MOLECULAR PROPERTIES
NITROGEN
Nuclear Physics & Elementary Particle Physics
OPTICAL PROPERTIES
Optics
PHOTOLUMINESCENCE
SINGLE CRYSTALS
SPECTRA
THERMAL PROPERTIES
THERMOLUMINESCENCE
TRANSITION METALS
VISIBLE ABSORPTION
WIDE GAP SEMICONDUCTORS
ZINC OXIDES
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Summary:This is the final report for a three-year project to identify and characterize donors and acceptors in single crystals of ZnO. Samples were obtained from our industrial partner (Eagle-Picher) and from the Air Force Research Laboratory (Hanscom AFB). The experimental techniques used to characterize the crystals were Hall effect, infrared and visible absorption, photoluminescence, thermoluminescence, electron paramagnetic resonance (EPR), and electron-nuclear double resonance (ENDOR). Studies completed during this project include: (1) an investigation of the isolated nitrogen acceptor in ZnO, (2) an investigation of the role of copper in the green luminescence from ZnO, (3) an investigation of molecular nitrogen acceptors in ZnO, (4) the diffusion of lithium acceptors into single crystals of ZnO, (5) the temperature dependence of the free exciton transition energy, (6) the ionization energy of isolated nitrogen acceptors determined from photoluminescence. (7) the observation of deep levels associated with transition-metal ions, (8) the effect of hydrogen annealing on the excitonic region of the photoluminescence spectrum, (9) the demonstration of the role of hydrogen as a charge compensator for singly ionized acceptors (i.e., the Li-OH center), and (10) the production of native donors in ZnO by high-temperature anneals in Zn vapor.