Oxygen doping in close-spaced-sublimed CdTe thin films for photovoltaic cells

Journal Article · Thu May 15 00:00:00 EDT 1986 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.336792· OSTI ID:5905961

Hsu, T M; Jih, R J; Lin, P C; Ueng, H Y; Hsu, Y J; Hwang, H L

Efficient CdTe/CdS thin film solar cells have been the recent focus, in which the CdTe layers were reported by close-spaced sublimation, and oxygen was used to control the p-type conductivity of the deposited films. Both the fundamental gap and the impurity level were determined by the wavelength modulation reflectance spectroscopy, which demonstrates that while oxygen atoms have an ionization energy of about 0.1 eV, they do not behave as a simple shallow acceptor. This finding is supported by the electrical characterization. The oxygen concentration incorporated in the CdTe thin films were found to be in the range of 10/sup 19/--10/sup 20/ cm/sup -3/ by the IR measurements, while a carrier concentration between 10/sup 10/ and 10/sup 12/ cm/sup -3/ was obtained by Hall measurements.

• Research Organization: Institute of Physics and Astronomy, National Central University, Chung-Li, Taiwan 320, Republic of China
• OSTI ID: 5905961
• Journal Information: J. Appl. Phys.; (United States), Vol. 59:10
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
CADMIUM SULFIDE SOLAR CELLS
CRYSTAL DOPING
ELECTRICAL PROPERTIES
CADMIUM TELLURIDE SOLAR CELLS
CADMIUM TELLURIDES
ENERGY GAP
OPTICAL PROPERTIES
CARRIER DENSITY
EFFICIENCY
ELECTRIC CONDUCTIVITY
FABRICATION
FOCUSING
HALL EFFECT
IMPURITIES
OPTICAL REFLECTION
CADMIUM COMPOUNDS
CHALCOGENIDES
DIRECT ENERGY CONVERTERS
EQUIPMENT
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
REFLECTION
SOLAR CELLS
SOLAR EQUIPMENT
TELLURIDES
TELLURIUM COMPOUNDS
140501* - Solar Energy Conversion- Photovoltaic Conversion