Impedance spectroscopy of Sb₂Se₃ photovoltaics consisting of (Sb₄Se₆)_<i>n</i> nanoribbons under light illumination.

Park, Jaemin, Shalvey, Thomas P, Moehl, Thomas, Woo, Kyoohee ORCID: 0000-0002-5534-9475, Major, Jonathan D ORCID: 0000-0002-5554-1985, Tilley, S David and Yang, Wooseok ORCID: 0000-0001-8750-5682 (2023) Impedance spectroscopy of Sb₂Se₃ photovoltaics consisting of (Sb₄Se₆)_<i>n</i> nanoribbons under light illumination. Nanoscale, 15 (48). pp. 19757-19766.

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Abstract

Sb₂Se₃, consisting of one-dimensional (Sb₄Se₆)_<i>n</i> nanoribbons has drawn attention as an intriguing light absorber from the photovoltaics (PVs) research community. However, further research is required on the performance-limiting factors in Sb₂Se₃ PVs. In this study, we investigated the charge carrier behavior in Sb₂Se₃ PVs by impedance spectroscopy (IS) under light illumination. (Sb₄Se₆)_<i>n</i> nanoribbons with two different orientations were used to investigate the effect of crystal orientation on the device performance. Regardless of the (Sb₄Se₆)_<i>n</i> orientation, negative capacitance was observed at forward bias, representing a recombination pathway at the TiO₂/Sb₂Se₃ interface. A comparison of the recombination resistances and lifetimes of two different Sb₂Se₃ PVs showed that a better interface could be formed by placing the (Sb₄Se₆)_<i>n</i> ribbons parallel to the TiO₂ layer. Based on these observations, an ideal structure of the Sb₂Se₃/TiO₂ interface is proposed, which will enhance the performance of Sb₂Se₃ PVs toward its theoretical limit.

Item Type:	Article
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	15 Dec 2023 11:32
Last Modified:	03 Jan 2024 02:56
DOI:	10.1039/d3nr04082h
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3177407