TY - GEN
T1 - Purification of low quality silicon feedstock
AU - Einhaus, R.
AU - Sarti, D.
AU - Hässler, C.
AU - Trassy, C.
AU - Delannoy, Y.
AU - De Wolf, S.
AU - Ferrazza, F.
AU - Martinuzzi, S.
AU - Warta, W.
N1 - Publisher Copyright:
© 2000 IEEE.
PY - 2000
Y1 - 2000
N2 - In the frame of the European ARTIST project, purification techniques have been developed that allow to use alternative silicon feedstock sources for PV production: (i) Very low resistivity (0.08-0.1 Ωcm) (VLR-) silicon material was produced by directional solidification, resulting in solar cells of 14.5% efficiency, (ii) an inductive plasma purification unit was developed, demonstrating a significant reduction of B, P, C, O, Ca, and AI impurities from upgraded metallurgical grade silicon, (iii) an Sb evaporation/condensation process was established to allow heavily doped n-type silicon feedstock to be used for PV, resulting in an average reduction of Sb by a factor of more than 100 after evaporation and directional solidification and in solar cell efficiencies above 15.5%. This paper summarises the technical state-of-the-art that has been achieved until present with respect to the above mentioned techniques.
AB - In the frame of the European ARTIST project, purification techniques have been developed that allow to use alternative silicon feedstock sources for PV production: (i) Very low resistivity (0.08-0.1 Ωcm) (VLR-) silicon material was produced by directional solidification, resulting in solar cells of 14.5% efficiency, (ii) an inductive plasma purification unit was developed, demonstrating a significant reduction of B, P, C, O, Ca, and AI impurities from upgraded metallurgical grade silicon, (iii) an Sb evaporation/condensation process was established to allow heavily doped n-type silicon feedstock to be used for PV, resulting in an average reduction of Sb by a factor of more than 100 after evaporation and directional solidification and in solar cell efficiencies above 15.5%. This paper summarises the technical state-of-the-art that has been achieved until present with respect to the above mentioned techniques.
UR - http://www.scopus.com/inward/record.url?scp=84949549401&partnerID=8YFLogxK
U2 - 10.1109/PVSC.2000.915795
DO - 10.1109/PVSC.2000.915795
M3 - Conference contribution
AN - SCOPUS:84949549401
T3 - Conference Record of the IEEE Photovoltaic Specialists Conference
SP - 221
EP - 224
BT - Conference Record of the 28th IEEE Photovoltaic Specialists Conference - 2000
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 28th IEEE Photovoltaic Specialists Conference, PVSC 2000
Y2 - 15 September 2000 through 22 September 2000
ER -