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Peral Boiza, Ana and Míguez, José Manuel and Ordás, Ramón and 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.
Title: | Lifetime improvement after phosphorous diffusion gettering on upgraded metallurgical grade silicon |
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Author/s: |
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Item Type: | Article |
Título de Revista/Publicación: | Solar Energy Materials and Solar Cells |
Date: | 2014 |
ISSN: | 0927-0248 |
Subjects: | |
Freetext Keywords: | Solar grade Silicon, Upgraded Metallurgical Silicon, Phosphorus Diffusion Gettering |
Faculty: | Instituto de Energía Solar (IES) (UPM) |
Department: | Otro |
UPM's Research Group: | Silicio y Nuevos Conceptos para Células Solares |
Creative Commons Licenses: | Recognition - Non commercial - Share |
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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.
Item ID: | 29996 |
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DC Identifier: | https://oa.upm.es/29996/ |
OAI Identifier: | oai:oa.upm.es:29996 |
DOI: | 10.1016/j.solmat.2014.02.026 |
Deposited by: | Profesor Titular Carlos del Cañizo Nadal |
Deposited on: | 18 Jun 2014 10:08 |
Last Modified: | 11 Apr 2019 10:23 |