Zn/sub 3/P/sub 2/ as an improved semiconductor for photovoltaic solar cells. Seventh quarterly report, March 1, 1980-May 31, 1980
ZnO/Zn/sub 3/P/sub 2/ semiconductor heterojunction device development has centered on obtaining low resistivity ZnO films whose resistivity is stable with time. Device instabilities have been noted which are associated with the time dependence of the ZnO resistivity. Hydrogen and to a lesser extent, chlorine-doped films exhibit the effect; however, ZnO films prepared by co-sputtering with zinc metal have low resistivity, high transmission, and are stable. The initial device results show reverse saturation currents in the 10/sup -7/ A/cm/sup 2/ range. P/N junction development has continued to examine the role of magnesium in Zn/sub 3/P/sub 2/ by examination of the diode parameters and spectral response of heat treated TMF magnesium light diodes. Changes in the spectral response of TMF magnesium diodes associated with the formation of a buried n on p junction are not observed for p-doping levels of 4.10/sup 17/ cm/sup -3/ although the fall off in blue response is seen for N/sub p/ = 1.10/sup 16/ cm/sup -3/, indicating that the magnesium solubility at 100/sup 0/C is between these values. EBIC examination of the junction depth versus time gives an estimate of the diffusion coefficient of magnesium of 2.10/sup -10/ cm/sup 2//min. Diffused magnesium/Zn/sub 3/P/sub 2/ junctions have now yielded open circuit voltages in excess of 0.6 volts at J/sub sc/ = 15 mA/cm/sup 2/ (2 x AM1).
- Research Organization:
- Delaware Univ., Newark (USA). Inst. of Energy Conversion
- DOE Contract Number:
- AC02-77CH00178
- OSTI ID:
- 6510640
- Report Number(s):
- SERI/PR-8062-1-T6
- Country of Publication:
- United States
- Language:
- English
Similar Records
Zn/sub 3/P/sub 2/ as an improved semiconductor for photovoltaic solar cells. Ninth quarterly report, September 1, 1980-November 31, 1980
Zn/sub 3/P/sub 2/ as an improved semiconductor for photovoltaic solar cells. Third quarterly report, March 1-May 31, 1979
Related Subjects
36 MATERIALS SCIENCE
ZINC PHOSPHIDE SOLAR CELLS
FABRICATION
PERFORMANCE TESTING
CURRENT DENSITY
DIFFUSION LENGTH
EFFICIENCY
ELECTRICAL PROPERTIES
FILMS
MAGNESIUM
MICA
SEMICONDUCTOR JUNCTIONS
SPECTRAL RESPONSE
SPUTTERING
SUBSTRATES
ZINC OXIDES
ZINC PHOSPHIDES
ALKALINE EARTH METALS
CHALCOGENIDES
DIMENSIONS
DIRECT ENERGY CONVERTERS
ELEMENTS
EQUIPMENT
JUNCTIONS
LENGTH
METALS
MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
PNICTIDES
SOLAR CELLS
SOLAR EQUIPMENT
TESTING
ZINC COMPOUNDS
140501* - Solar Energy Conversion- Photovoltaic Conversion
360601 - Other Materials- Preparation & Manufacture