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\bibitem{Vishwakarma_etal2020} {\textquotedblleft}\textit{Nanoscale photovoltage mapping in CZTSe/CuxSe heterostructure by using kelvin probe force microscopy}{\textquotedblright}. Vishwakarma M, Varandani D, Hendrickx M, Hadermann J, Mehta BR, Materials Research Express \textbf{7}, 016418 (2020).   http://doi.org/10.1088/2053-1591/AB65E6

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