High efficiency polycrystalline silicon solar cells using phosphorus pretreatment

Narayanan, S.; Wenham, S. R.; Green, M. A.
March 1986
Applied Physics Letters;3/31/1986, Vol. 48 Issue 13, p873
Academic Journal
Recent improvements in crystalline silicon solar cell energy conversion efficiency to beyond 20% have been obtained by combining surface oxide passivation with high quality, low resistivity substrates. The objective of the present work was to evaluate the effectiveness of these techniques in improving efficiency on lower quality cast polycrystalline silicon. Due to the poorer crystallographic quality and higher levels of secondary impurities, an additional phosphorus pretreatment was found to reliably improve the performance of the polycrystalline cells above those fabricated without this pretreatment. Cell energy conversion efficiencies were notably higher than previously reported for the present material with values in the 15.3–16.0% range obtained for p-type substrates of 0.1–1 Ω cm resistivity.


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