Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
High-Performance and Traditional Multicrystalline Silicon: Comparing Gettering Responses and Lifetime-Limiting Defects
Year:2016
Research Areas
  • Silicon,
  • Solar cells
Information
Abstract
In recent years, high-performance multicrystalline silicon (HPMC-Si) has emerged as an attractive alternative to traditional ingot-based multicrystalline silicon (mc-Si), with a similar cost structure but improved cell performance. Herein, we evaluate the gettering response of traditional mc-Si and HPMC-Si. Microanalytical techniques demonstrate that HPMC-Si and mc-Si share similar lifetime-limiting defect types but have different relative concentrations and distributions. HPMC-Si shows a substantial lifetime improvement after P-gettering compared with mc-Si, chiefly because of lower area fraction of dislocation-rich clusters. In both materials, the dislocation clusters and grain boundaries were associated with relatively higher interstitial iron point-defect concentrations after diffusion, which is suggestive of dissolving metal-impurity precipitates. The relatively fewer dislocation clusters in HPMC-Si are shown to exhibit similar characteristics to those found in mc-Si. Given similar governing principles, a proxy to determine relative recombination activity of dislocation clusters developed for mc-Si is successfully transferred to HPMC-Si. The lifetime in the remainder of HPMC-Si material is found to be limited by grain-boundary recombination. To reduce the recombination activity of grain boundaries in HPMC-Si, coordinated impurity control during growth, gettering, and passivation must be developed.
International
Si
JCR
Si
Title
Ieee Journal of Photovoltaics
ISBN
2156-3381
Impact factor JCR
3
Impact info
Volume
PP
10.1109/jphotov.2016.2540246
Journal number
99
From page
1
To page
9
Month
SIN MES
Ranking
Participants
  • Autor: S. Castellanos
  • Autor: K.E. Ekstrom
  • Autor: A. Autruffe
  • Autor: M.A. Jensen
  • Autor: A.E. Morishige
  • Autor: J. Hofstetter
  • Autor: P. Yen
  • Autor: B. Lai
  • Autor: G. Stokkan
  • Autor: Carlos del Cañizo Nadal (UPM)
  • Autor: T. Buonassisi
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares
  • Centro o Instituto I+D+i: Instituto de Energía Solar
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
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