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Memorias de investigación
Artículos en revistas:
High-Performance and Traditional Multicrystalline Silicon: Comparing Gettering Responses and Lifetime-Limiting Defects
Año:2016
Áreas de investigación
  • Silicio,
  • Células solares
Datos
Descripción
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.
Internacional
Si
JCR del ISI
Si
Título de la revista
Ieee Journal of Photovoltaics
ISSN
2156-3381
Factor de impacto JCR
3
Información de impacto
Volumen
PP
DOI
10.1109/jphotov.2016.2540246
Número de revista
99
Desde la página
1
Hasta la página
9
Mes
SIN MES
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Participantes
  • 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
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares
  • Centro o Instituto I+D+i: Instituto de Energía Solar
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