Impurity complex formation in ultra-pure germanium
Several unknown, hydrogenic acceptors and donors were recently discovered in ultra-pure germanium by photoelectric spectroscopy. These centers are not created by elemental impurities. Comparative analysis of a large number of crystals grown under various conditions lead to the conclusion that copper, a fast diffusing multivalent acceptor, together with lithium and/or hydrogen, is responsible for several of the unknown centers. This is the first time that hydrogen has been recognized as playing the role of a donor pairing with an acceptor. Hall effect measurements complementing the photoelectric spectroscopy results lead to a tentative assignment of the following energy levels: (Cu, Li) complexes: E/sub V/ + 20.5 meV/super */, E/sub V/ + 25.0 meV/super */, E/sub V/ + 275 meV(/super */hydrogenic acceptor); (Cu, H) complexes: E/sub V/ + 17.0 meV/super */, E/sub V/ + 17.5 meV/super */, E/sub V/ + 175 meV. Experiments which may help determine the structure of the complexes are proposed.
- Research Organization:
- California Univ., Berkeley (USA). Lawrence Berkeley Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7300717
- Report Number(s):
- LBL-6432; CONF-770563-1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrogen-multivalent acceptor complexes in high-purity germanium
Isotope shifts in the ground state of shallow, hydrogenic centers in pure germanium
Related Subjects
360603 -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METALS
COMPLEXES
COPPER COMPLEXES
CRYOGENIC FLUIDS
ELECTRON SPECTROSCOPY
ELEMENTS
FLUIDS
GERMANIUM
GERMANIUM COMPLEXES
HALL EFFECT
HYDROGEN
IMPURITIES
LITHIUM
METALS
NONMETALS
PHOTOELECTRON SPECTROSCOPY
SPECTROSCOPY
TRANSITION ELEMENT COMPLEXES