TY - GEN
T1 - Characterization of impurities in GaInNAs pn junctions from capacitance transient spectroscopy
AU - Jiménez Tejada, J. A.
AU - Deen, M. J.
AU - Lara Bullejos, P.
AU - López Villanueva, J. A.
AU - Gómez-Campos, F. M.
AU - Rodríguez-Bolívar, S.
PY - 2007/10/15
Y1 - 2007/10/15
N2 - Difficulties and their solutions found during the determination of parameters of impurities in thin GaInNAs solar cells, by means of spectroscopic capacitance measurements, are presented in this work. The parameters of impurities present in the GaInNAs pn junctions are determined by an iterative method, comparing experimental capacitance transients with calculated ones. The results disagree with the ones obtained by applying the classical expressions associated to the capacitance deep level transient spectroscopy (DLTS). The parameters of the centers are used to determine the hole diffusion lengths in the semiconductor. The agreement between the hole diffusion lengths obtained with our method and results found in literature means that DLTS must be used with care when determining recombination centers in thin pn junctions. An expression to be included in the DLTS technique, that incorporates these effects, is proposed.
AB - Difficulties and their solutions found during the determination of parameters of impurities in thin GaInNAs solar cells, by means of spectroscopic capacitance measurements, are presented in this work. The parameters of impurities present in the GaInNAs pn junctions are determined by an iterative method, comparing experimental capacitance transients with calculated ones. The results disagree with the ones obtained by applying the classical expressions associated to the capacitance deep level transient spectroscopy (DLTS). The parameters of the centers are used to determine the hole diffusion lengths in the semiconductor. The agreement between the hole diffusion lengths obtained with our method and results found in literature means that DLTS must be used with care when determining recombination centers in thin pn junctions. An expression to be included in the DLTS technique, that incorporates these effects, is proposed.
KW - Capacitance measurement
KW - Photovoltaic cells
KW - Semiconductor impurities
KW - Semiconductor junctions
UR - https://www.scopus.com/pages/publications/35148848812
U2 - 10.1109/SCED.2007.384012
DO - 10.1109/SCED.2007.384012
M3 - Conference contribution
AN - SCOPUS:35148848812
SN - 1424408687
SN - 9781424408689
T3 - 2007 Spanish Conference on Electron Devices, Proceedings
SP - 139
EP - 142
BT - 2007 Spanish Conference on Electron Devices, Proceedings
T2 - 2007 Spanish Conference on Electron Devices, SCED
Y2 - 31 January 2007 through 2 February 2007
ER -