SEMICONDUCTOR-TINI JUNCTION ELECTRONIC DEVICE

Award Information
Agency:
Department of Health and Human Services
Branch
n/a
Amount:
$49,940.00
Award Year:
1989
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
11224
Agency Tracking Number:
11224
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1144 65th St, Oakland, CA, 94608
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
() -
Research Institute:
n/a
Abstract
AT THE JUNCTION OF A SEMICONDUCTOR AND A METAL, THE INITIAL MISMATCH IN CHEMICAL POTENTIALS OF THE TWO MATERIALS LEADS TO AN ELECTRIC FIELD IN THE SEMICONDUCTOR AS A CHARGE CROSSES THE INTERFACE TO EQUALIZE THESE POTENTIALS. THE RESULTING ELECTRIC FIELD OR DEPLETION WIDTH AFFECTS THE PHOTOLUMINESCENCE BEHAVIOR IN THE SEMICONDUCTOR BECAUSE ELECTRON-HOLE PAIRS THAT ARE GENERATED IN THIS ZONE ARE SEPARATED BY THE FIELD AND THUS CANNOT RADIATIVELY RECOMBINE. IT IS PLANNED TO EXPLORE THIS PHENOMENON AS A PROBE OF THE ELECTRONIC STRUCTURE OF TITANIUM-NICKEL (TINI) THIN FILM. TINI SHAPE-MEMORY ALLOY UNDERGOES A SOLID-STATE PHASE CHANGETHAT IS EXPECTED TO ALTER THE FERMI LEVELS IN THE UNDERLYINGSEMICONDUCTOR. THERE IS A POSSIBILITY OF DEVELOPING A TRANSDUCER THAT IS SENSITIVE TO THE CRYSTALLINE STATE OF TINI AND MAY BE A SENSITIVE MINIATURE CHEMICAL PROBE. FILMS OF TINI SHAPE-MEMORY ALLOY WILL BE PREPARED IN THICKNESSES VARYING FROM A FEW THOUSAND ANGSTROMS TO SEVERAL MICRONS, SPUTTERED ONTO A VARIETY OF SUBSTRATES. THESE TEST SAMPLES WILL BE STUDIED BY PHOTOLUMINESCENCE AS THE TEMPERATURE IS VARIED THROUGH THE TRANSITION TEMPERATURE OF THE TINI FILM. THE EXPECTED RESULT IS A SIGNIFICANT SHIFT IN THE SPECTRUM AND/OR INTENSITY OF EMITTED LIGHT WHEN THE PHASE CHANGE OCCURS.

* information listed above is at the time of submission.

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