Lifetime improvement after phosphorous diffusion gettering on upgraded metallurgical grade silicon

Peral Boiza, Ana; Míguez, José Manuel; Ordás, Ramón y Cañizo Nadal, Carlos del (2014). Lifetime improvement after phosphorous diffusion gettering on upgraded metallurgical grade silicon. "Solar Energy Materials and Solar Cells" ; ISSN 0927-0248. https://doi.org/10.1016/j.solmat.2014.02.026.

Descripción

Título: Lifetime improvement after phosphorous diffusion gettering on upgraded metallurgical grade silicon
Autor/es:
  • Peral Boiza, Ana
  • Míguez, José Manuel
  • Ordás, Ramón
  • Cañizo Nadal, Carlos del
Tipo de Documento: Artículo
Título de Revista/Publicación: Solar Energy Materials and Solar Cells
Fecha: 2014
Materias:
Palabras Clave Informales: Solar grade Silicon, Upgraded Metallurgical Silicon, Phosphorus Diffusion Gettering
Escuela: Instituto de Energía Solar (IES) (UPM)
Departamento: Otro
Grupo Investigación UPM: Silicio y Nuevos Conceptos para Células Solares
Licencias Creative Commons: Reconocimiento - No comercial - Compartir igual

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Resumen

Wide experimental evidence of the phosphorus diffusion gettering beneficial effect on solar grade silicon is found by measuring electron effective lifetime and interstitial iron concentration in as-grown and post processed samples from two ingots of upgraded metallurgical grade silicon produced by Ferrosolar. Results after two different P-diffusion processes are compared: P emitter diffusion at 850ºC followed by fast cool-down (called “standard process”) or followed by slow cool-down (called “extended process”). It is shown that final lifetimes of this low cost material are in the range of those obtained with conventional material. The extended process can be beneficial for wafers with specific initial distribution and concentration of iron, e.g. materials with high concentration of big Fe precipitates, while for other cases the standard process is enough efficient. An analysis based on the comparison of measured lifetime and dissolved iron concentration with theoretical calculations helps to infer the initial iron distribution and concentration, and according to that, choose the more effective type of gettering.

Más información

ID de Registro: 29996
Identificador DC: http://oa.upm.es/29996/
Identificador OAI: oai:oa.upm.es:29996
Identificador DOI: 10.1016/j.solmat.2014.02.026
Depositado por: Profesor Titular Carlos del Cañizo Nadal
Depositado el: 18 Jun 2014 10:08
Ultima Modificación: 01 Abr 2016 22:56
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