A Facile Aqueous Solution Route for the Growth of Chalcogenide Perovskite BaZrS₃ Films

Journal Article · 25 March 2023 · Photonics

DOI: https://doi.org/10.3390/photonics10040366 · OSTI ID:2281522

Dhole, Samyak ^[1]; Wei, Xiucheng ^[1]; Hui, Haolei ^[1]; Roy, Pinku ^[1]; Corey, Zachary ^[1]; Wang, Yongqiang  ^[2]; Nie, Wanyi ^[2]; Chen, Aiping ^[2]; Zeng, Hao ^[1]; Jia, Quanxi  ^[1]

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1. State University of New York at Buffalo, NY (United States)
2. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)

The prototypical chalcogenide perovskite, BaZrS₃ (BZS), with its direct bandgap of 1.7–1.8 eV, high chemical stability, and strong light–matter interactions, has garnered significant interest over the past few years. So far, attempts to grow BaZrS₃ films have been limited mainly to physical vapor deposition techniques. Here, we report the fabrication of BZS thin films via a facile aqueous solution route of polymer-assisted deposition (PAD), where the polymer-chelated cation precursor films were sulfurized in a mixed CS₂ and Ar atmosphere. The formation of a single-phase polycrystalline BZS thin film at a processing temperature of 900 °C was confirmed by X-ray diffraction and Raman spectroscopy. The stoichiometry of the films was verified by Rutherford Backscattering spectrometry and energy-dispersive X-ray spectroscopy. The BZS films showed a photoluminescence peak at around 1.8 eV and exhibited a photogenerated current under light illumination at a wavelength of 530 nm. Temperature-dependent resistivity analysis revealed that the conduction of BaZrS₃ films under the dark condition could be described by the Efros–Shklovskii variable range hopping model in the temperature range of 60–300 K, with an activation energy of about 44 meV.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)
• Grant/Contract Number: 89233218CNA000001; ECCS-1902623; ECCS-2042085
• OSTI ID: 2281522
• Report Number(s): LA-UR-23-30564
• Journal Information: Photonics, Vol. 10, Issue 4; ISSN 2304-6732
• Publisher: MDPICopyright Statement
• Country of Publication: United States
• Language: English