Title :
Two-Step Annealing Study of Cuprous Oxide for Photovoltaic Applications
Author :
Lloyd, Michael A. ; Sin-Cheng Siah ; Brandt, Riley E. ; Serdy, James ; Johnston, Steve W. ; Hofstetter, Jasmin ; Yun Seog Lee ; McCandless, Brian ; Buonassisi, Tonio
Author_Institution :
Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
The properties of large grain cuprous oxide (Cu2O) foils are explored after the implementation of a controlled postgrowth annealing process. P-type foils with a wide range of carrier density are demonstrated, enabling a promising processing window for wide bandgap solar cell devices. Hall measurements at room temperature show increased majority carrier concentration after nitrogen annealing and a reduction in mobility. The progressive change in resistivity with annealing temperature is shown, with values approaching 100 Ω·cm. Carrier recombination, measured by microwave photoconductance decay, shows a discrete change upon annealing.
Keywords :
annealing; carrier density; carrier mobility; copper compounds; foils; photoconductivity; solar cells; Cu2O; carrier concentration; carrier density; carrier mobility; carrier recombination; cuprous oxide foils; microwave photoconductance decay; photovoltaic applications; postgrowth annealing; two step annealing; wide bandgap solar cell devices; Annealing; Charge carrier density; Conductivity; Photovoltaic systems; Temperature measurement; X-ray scattering; Annealing; X-ray diffraction; charge carrier density; charge carrier mobility; copper compounds; photoconductivity; photovoltaic cells;
Journal_Title :
Photovoltaics, IEEE Journal of
DOI :
10.1109/JPHOTOV.2015.2455332
