@inproceedings{0a15a8a6194a4d3d92c58ede34ed604a,
title = "Screen-printed al back contacts on Si solar cells: Issues and some solutions",
abstract = "This paper identifies some mechanisms that lead to problems in back Al contact formation. Major issues are related to a basic problem that the Al melt has a large surface tension and tries to ball up during the firing step. Other issues arise from dissolution of the Si-Al interface and entrapment of glass within the Si-Al alloy. Si diffusion into Al can be applied to control the melt, while cooling rate can help improve the structure of various regions of the back contact for a favorable series resistance. We also discuss a modified time-temperature profile that can lead to a deep and uniform back-surface field.",
author = "Vishal Mehta and Bhushan Sopori and Robert Reedy and Bobby To and Helio Moutinho and Ravindra, {N. M.}",
year = "2010",
language = "English (US)",
isbn = "9781605111834",
series = "Materials Research Society Symposium Proceedings",
pages = "107--112",
booktitle = "Photovoltaic Materials and Manufacturing Issues II",
note = "2009 MRS Fall Meeting ; Conference date: 29-11-2009 Through 03-12-2009",
}