AI Article Synopsis
- * The band gap of the materials can be tuned, ranging from approximately 2.0 eV for CsBiI to 2.64 eV for CsBiBr, which was demonstrated in mixed-phase compositions.
- * Initial tests show that these Bi-based perovskite materials have promising photocatalytic activity for degrading methylene blue, suggesting potential for future use as photocatalysts.
Article Abstract
Crystalline films of lead-free all-inorganic CsBiX (X = Br, I) perovskites have been deposited by radio frequency (RF)-magnetron sputtering providing high-quality, single-phase films as confirmed by structural, morphological, and optical property characterization. Progressive tuning of crystal structure characteristics and optical absorbance has been achieved in mixed Br/I phases CsBi(IBr) (0 ≤ ≤ 1), highlighting a shift of the band gap from about 2.0 eV for CsBiI to 2.64 eV for CsBiBr. X-ray diffraction and Raman scattering allowed defining the range of alloyed compositions where single-phase compositions are found. Finally, preliminary photocatalytic activity tests on the degradation of methylene blue provided solid data indicating the future possible exploitation of Bi-based perovskite derivative materials as active photocatalysts.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8456412 | PMC |
| http://dx.doi.org/10.1021/acs.inorgchem.1c01545 | DOI Listing |
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