TY - JOUR
T1 - Improvement of the electrical properties of the frontal contact in CdS/CdTe solar cells
AU - Jiménez Olarte, D.
AU - Vigil Galán, O.
AU - Albor Aguilera, M. L.
AU - Hernandez Vasquez, C.
AU - Flores Marquez, J. M.
N1 - Publisher Copyright:
© 2017 IOP Publishing Ltd.
PY - 2017/10
Y1 - 2017/10
N2 - The use of a high resistivity transparent oxides (HRT) onto low resistivity transparent oxides (TCO) has been found to improve the performance of CdS/CdTe solar cells. In this work is presented and discussed a study about the use of a commercial conductive glass with SnO2:F as TCO and SnO2 as resistive transparent oxide as front contact in CdS/CdTe solar cells. The SnO2 was deposited by pneumatic spray pyrolysis and its electrical and optical properties were controlled and optimized by varying the substrate temperature and deposition time with the application of a post thermal treatment in O2 atmosphere. The transfer length method (TLM) was implemented to characterize electrically the SnO2:F/SnO2 as well the SnO2/CdS and SnO2:F/SnO2/CdS interfaces through the resistivity and specific contact resistivity measurements and their dependence on O2 treatment were analyzed. The use of the TCO/buffer layer on the CdS/CdTe solar cell in combination with the thermal treatment proposed in this work for TCO and HRT reduced the front contact/CdS contact resistance in a 10 factor and the solar cell efficiency was improved from 6.4% to 12.2%.
AB - The use of a high resistivity transparent oxides (HRT) onto low resistivity transparent oxides (TCO) has been found to improve the performance of CdS/CdTe solar cells. In this work is presented and discussed a study about the use of a commercial conductive glass with SnO2:F as TCO and SnO2 as resistive transparent oxide as front contact in CdS/CdTe solar cells. The SnO2 was deposited by pneumatic spray pyrolysis and its electrical and optical properties were controlled and optimized by varying the substrate temperature and deposition time with the application of a post thermal treatment in O2 atmosphere. The transfer length method (TLM) was implemented to characterize electrically the SnO2:F/SnO2 as well the SnO2/CdS and SnO2:F/SnO2/CdS interfaces through the resistivity and specific contact resistivity measurements and their dependence on O2 treatment were analyzed. The use of the TCO/buffer layer on the CdS/CdTe solar cell in combination with the thermal treatment proposed in this work for TCO and HRT reduced the front contact/CdS contact resistance in a 10 factor and the solar cell efficiency was improved from 6.4% to 12.2%.
KW - CdS/CdTe solar cells
KW - SnO buffer layer
KW - Specifc contact resistivity
KW - TLM method
KW - laser scribing technique
UR - http://www.scopus.com/inward/record.url?scp=85042871153&partnerID=8YFLogxK
U2 - 10.1088/2053-1591/aa913a
DO - 10.1088/2053-1591/aa913a
M3 - Artículo
SN - 2053-1591
VL - 4
JO - Materials Research Express
JF - Materials Research Express
IS - 10
M1 - 105906
ER -