Authors have contributed equally.
Passivation of n-type emitter and p-type base in solar cells via oxygen terminated silicon nanoparticles
Article first published online: 3 JAN 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Progress in Photovoltaics: Research and Applications
Volume 21, Issue 5, pages 1146–1152, August 2013
How to Cite
Patil, S., Cherukupalli, R., Pramod, M. R., More, S., Mahamuni, S., Jadkar, S. R., Dusane, R. O., Dharmadhikari, C. V. and Ghaisas, S. V. (2013), Passivation of n-type emitter and p-type base in solar cells via oxygen terminated silicon nanoparticles. Prog. Photovolt: Res. Appl., 21: 1146–1152. doi: 10.1002/pip.2318
- Issue published online: 20 JUL 2013
- Article first published online: 3 JAN 2013
- Manuscript Accepted: 15 OCT 2012
- Manuscript Revised: 24 AUG 2012
- Manuscript Received: 7 JUN 2012
- surface passivation;
- silicon solar cell;
Various measurements and experiments are performed to establish the mechanism of passivation on emitter and base of conventionally manufactured solar cell with p-type base. The surface coatings on the emitter are removed. The bare surface is then coated with silicon (Si) nanoparticles (NPs) with oxygen termination. It shows an increase in the cell efficiency up to 14% over bare surface of solar cell. The NPs show enhancement in light scattering from the surface, but shows an increase in the recombination lifetime indicating an improved passivation. When back contact is partially removed, the coating on bare back side ( p-type) of the solar cell also improves the cell efficiency. This is also attributable to the increased recombination lifetime from the measurements. Same NPs are seen to degrade the surface of n and p-type Si wafers. This apparently contradictory behaviour is explained by studying and comparing the emitter (n-type) surface of the solar cell with that of n-type Si wafer and the back surface ( p-type) with that of p-type Si wafer. The emitter surface is distinctly different from the n-type wafer because of the shallow p–n junction causing the surface depletion. Back surface has aluminium (Al) metal trace, which plays an important role in forming complexes with the oxygen-terminated Si NPs (Si–O NPs). With these studies, it is observed that increase in the efficiency can potentially reduce the thermal budget in solar cell preparation. Copyright © 2013 John Wiley & Sons, Ltd.