Accepted Manuscript Photovoltage spectroscopy of direct and indirect bandgaps of strained Ge 1-x Sn x thin films on a Ge/Si(001) substrate S.V. Kondratenko, Yu.V. Hyrka, Yu.I. Mazur, A.V. Kuchuk, W. Dou, H. Tran, J. Margetis, J. Tolle, S.-Q. Yu, G.J. Salamo PII: S1359-6454(19)30196-X DOI: https://doi.org/10.1016/j.actamat.2019.04.004 Reference: AM 15214 To appear in: Acta Materialia Received Date: 13 December 2018 Revised Date: 5 March 2019 Accepted Date: 2 April 2019 Please cite this article as: S.V. Kondratenko, Y.V. Hyrka, Y.I. Mazur, A.V. Kuchuk, W. Dou, H. Tran, J. Margetis, J. Tolle, S.-Q. Yu, G.J. Salamo, Photovoltage spectroscopy of direct and indirect bandgaps of strained Ge 1-x Sn x thin films on a Ge/Si(001) substrate, Acta Materialia, https://doi.org/10.1016/ j.actamat.2019.04.004. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.