FTIR and FT-PL Spectroscopic Analysis of TPV Materials and Devices

Conference · Tue Oct 27 23:00:00 EST 1998

OSTI ID:5040

Webb, J D; Gedvilas, L M; Olson, M R; Wu, X; Duda, A; Wanlass, M W; Jones, K M

Impurities in cadmium sulfide (CdS) films are a concern in the fabrication of copper (indium, gallium) diselenide (CIGS) and cadmium telluride (CdTe) photovoltaic devices. Devices incorporating chemical-bath-deposited (CBD) CdS are comparable in quality to devices incorporating purer CdS films grown using vacuum deposition techniques, despite the higher impurity concentrations typically observed in the CBD CdS films. In this paper, we summarize and review the results of Fourier transform infrared (FTIR), Auger, electron microprobe, and X-ray photoelectron spectroscopic (XPS) analyses of the impurities in CBD CdS films. We show that these impurities differ as a function of substrate type and film deposition conditions. We also show that some of these impurities exist as 102 micron-scale precipitates.

• Research Organization: National Renewable Energy Lab., Golden, CO (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC36-83CH10093
• OSTI ID: 5040
• Report Number(s): NREL/CP-520-25347; ON: DE00005040
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
CADMIUM SULFIDES
CADMIUM TELLURIDES
COPPER
DEPOSITION
ELECTRICITY
ELECTRONS
FABRICATION
GALLIUM
IMPURITIES
INDIUM
SUBSTRATES
X-RAY PHOTOELECTRON SPECTROSCOPY