Tunable optical properties in the (110) <sub>p</sub> -oriented layered halide perovskite FA <sub>4</sub> Pb <sub>2</sub> I <sub>7.5</sub> (SCN) <sub>0.5</sub> by Br substitution
Organic-inorganic hybrid halide perovskites have been explored extensively for optoelectronic functional materials. Here, we report (110)<sub>p</sub>-oriented layered halide perovskite thin films with nominal compositions of FA<sub>4</sub>Pb<sub>2</sub>(Br<sub><i>x</i></sub>I<sub>1-<i>x</i></sub>)<sub>7.5</sub>(SCN)<sub>0.5</sub> (<i>x</i> = 0, 0.25, 0.5, 0.75, and 1). X-ray diffraction measurements and UV-visible diffuse reflectance measurements demonstrate the successful formation of a solid solution between iodide and bromide. The band gap gradually changes from 2.18 eV to 2.81 eV with increasing Br content, and PL emission of 750 nm was observed for the <i>x</i> = 0 film. We also report a single crystal sample of <i>x</i> = 1.
Authors
- Takanori Fukushima (ORCID: https://orcid.org/0000-0001-5586-9238)
- Takafumi Yamamoto (ORCID: https://orcid.org/0000-0002-7960-1014)
- Tomoya Fukui (ORCID: https://orcid.org/0000-0003-4814-4401)
- Makhsud I. Saidaminov (ORCID: https://orcid.org/0000-0002-3850-666X)
- Muhammad Awais (ORCID: https://orcid.org/0000-0002-6853-758X)
- Shoya Nagano
- Takuya Ohmi (ORCID: https://orcid.org/0000-0001-9761-134X)
- Wataru Taniguchi
- Masaki Azuma (ORCID: https://orcid.org/0000-0002-8378-321X)
- Kisa Matsushima (ORCID: https://orcid.org/0009-0001-0220-6075)
Institutions
- National Institute for Materials Science (JP)
- University of Victoria (CA)
- Kyoto University (JP)
- Innovative Research (United States) (US)
- Kanagawa Industrial Technology Center (JP)
Publication Details
- Journal
- Dalton Transactions
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5dt02441b
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00