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Methods to Improve Bulk Lifetime in n-Type Czochralski-Grown Upgraded Metallurgical-Grade Silicon Wafers

Basnet, Rabin; Rougieux, Fiacre; Sun, Chang; Phang, Sieu Pheng; Samundsett, Christian; Einhaus, Roland; Degoulange, Julien; Macdonald, Daniel


This paper investigates the potential of three different methods-tabula rasa (TR), phosphorus diffusion gettering (PDG), and hydrogenation, for improving the carrier lifetime in n-type Czochralski-grown upgraded metallurgical-grade (UMG) silicon samples. Our results show that the lifetimes in the UMG wafers used in this study were affected by both mobile metallic impurities and as-grown oxygen precipitate nuclei. Thus, the dissolution of grown-in oxygen precipitate nuclei via TR and the removal...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: IEEE Journal of Photovoltaics
DOI: 10.1109/JPHOTOV.2018.2834944


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