Please use this identifier to cite or link to this item:
DC FieldValue
dc.titleModelling and simulation of field-effect surface passivation of crystalline silicon-based solar cells
dc.contributor.authorMa, F.-J.
dc.contributor.authorHoex, B.
dc.contributor.authorSamudra, G.S.
dc.contributor.authorAberle, A.G.
dc.identifier.citationMa, F.-J., Hoex, B., Samudra, G.S., Aberle, A.G. (2012). Modelling and simulation of field-effect surface passivation of crystalline silicon-based solar cells. Energy Procedia 15 : 155-161. ScholarBank@NUS Repository.
dc.description.abstractAn effective surface passivation plays a vital role in the performance of crystalline silicon (c-Si) solar cells. Experimental research shows that fixed charge-induced field-effect passivates the c-Si efficiently. In this work, n-type and p-t ype c-Si wafers symmetrically passivated by the negative-charge dielectric Al 2O 3 were numerically modelled with SENTAURUS TCAD. Surface recombination is traditionally modelled by employing the extended Shockley-Read-Hall (SRH) model with single energy level of interface traps. However, experiments show interface traps distribute across the silicon bandgap. Thus, we implemented the extended SRH model with the ability to describe arbitrary energy distribution of interface traps within the bandgap. The extended SRH model predicts a constant effective surface recombination velocity at low injection levels for lightly doped n-type and p-type c-Si passivated by dielectrics with either a high negative or positive charge density. However, this prediction contradicts experimental results which show a significant reduction of the effective lifetime at low injection levels if the polarity of the fixed charge is attracting the minority bulk charge carriers. One explanation is assuming the presence of a thin defect-rich layer close to the c-Si surface in which the lifetimes are degraded. However, the choice of the lifetime and depth of such damaged surface region seem rather arbitrary and its physical origin is still unclear. We show that unequal electron and hole bulk lifetime parameters can also account for the phenomenon. This proposition is physically plausible and the simulation results also show a good agreement with the experimental data from both n-type and p-t yp e c-Si wafers passivated by Al 2O 3. Our modelling results predict a simple but unambiguous experiment to distinguish between these two explanations. © 2011 Published by Elsevier Ltd.
dc.subjectField effect
dc.subjectSolar cell
dc.subjectSurface passivation
dc.typeConference Paper
dc.contributor.departmentSOLAR ENERGY RESEARCH INST OF S'PORE
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.sourcetitleEnergy Procedia
Appears in Collections:Staff Publications

Show simple item record
Files in This Item:
There are no files associated with this item.


checked on Aug 12, 2020


checked on Aug 12, 2020

Page view(s)

checked on Aug 2, 2020

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.