Characterization of Sulfur Bonding in CdS:O Buffer Layers for CdTe-based Thin-Film Solar Cells

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• 作者：Douglas A. Duncan ; Jason M. Kephart ; Kimberly Horsley ; Monika Blum ; Michelle Mezher ; Lothar Weinhardt ; Marc H盲ming ; Regan G. Wilks ; Timo Hofmann ; Wanli Yang ; Marcus B盲r ; Walajabad S. Sampath ; Clemens Heske
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 5, 2015
• 年：2015
• 卷：7
• 期：30
• 页码：16382-16386
• 全文大小：299K
• ISSN：1944-8252

文摘

On the basis of a combination of X-ray photoelectron spectroscopy and synchrotron-based X-ray emission spectroscopy, we present a detailed characterization of the chemical structure of CdS:O thin films that can be employed as a substitute for CdS layers in thin-film solar cells. It is possible to analyze the local chemical environment of the probed elements, in particular sulfur, hence allowing insights into the species-specific composition of the films and their surfaces. A detailed quantification of the observed sulfur environments (i.e., sulfide, sulfate, and an intermediate oxide) as a function of oxygen content is presented, allowing a deliberate optimization of CdS:O thin films for their use as alternative buffer layers in thin-film photovoltaic devices.