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Optical and Structural Property Tuning in Physical Vapor Deposited Bismuth Halides Cs3Bi2(I1–xBrx)9 (0 ≤ x ≤ 1)
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-09-02 , DOI: 10.1021/acs.inorgchem.1c01545 Sara Bonomi 1 , Pietro Galinetto 2 , Maddalena Patrini 2 , Lidia Romani 1 , Lorenzo Malavasi 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-09-02 , DOI: 10.1021/acs.inorgchem.1c01545 Sara Bonomi 1 , Pietro Galinetto 2 , Maddalena Patrini 2 , Lidia Romani 1 , Lorenzo Malavasi 1
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Crystalline films of lead-free all-inorganic Cs3Bi2X9 (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 Cs3Bi2(I1–xBrx)9 (0 ≤ x ≤ 1), highlighting a shift of the band gap from about 2.0 eV for Cs3Bi2I9 to 2.64 eV for Cs3Bi2Br9. 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.
中文翻译：
物理气相沉积卤化铋 Cs3Bi2(I1–xBrx)9 (0 ≤ x ≤ 1) 的光学和结构性能调节
无铅全无机 Cs 3 Bi 2 X 9 (X = Br, I) 钙钛矿晶体薄膜已通过射频 (RF) 磁控溅射沉积，提供了高质量的单相薄膜，经结构、形态证实和光学特性表征。在混合 Br/I 相 Cs 3 Bi 2 (I 1– x Br x ) 9 (0 ≤ x ≤ 1) 中已经实现了晶体结构特征和光学吸光度的逐步调节，突出显示了带隙从约 2.0 eV 的变化对于Cs 3 Bi 2 I 9至对于Cs 3 Bi 2 Br 9为2.64 eV。 X 射线衍射和拉曼散射可以定义发现单相成分的合金成分范围。最后，对亚甲基蓝降解的初步光催化活性测试提供了可靠的数据，表明未来可能将铋基钙钛矿衍生物材料用作活性光催化剂。
更新日期：2021-09-20
中文翻译：
物理气相沉积卤化铋 Cs3Bi2(I1–xBrx)9 (0 ≤ x ≤ 1) 的光学和结构性能调节
无铅全无机 Cs 3 Bi 2 X 9 (X = Br, I) 钙钛矿晶体薄膜已通过射频 (RF) 磁控溅射沉积，提供了高质量的单相薄膜，经结构、形态证实和光学特性表征。在混合 Br/I 相 Cs 3 Bi 2 (I 1– x Br x ) 9 (0 ≤ x ≤ 1) 中已经实现了晶体结构特征和光学吸光度的逐步调节，突出显示了带隙从约 2.0 eV 的变化对于Cs 3 Bi 2 I 9至对于Cs 3 Bi 2 Br 9为2.64 eV。 X 射线衍射和拉曼散射可以定义发现单相成分的合金成分范围。最后，对亚甲基蓝降解的初步光催化活性测试提供了可靠的数据，表明未来可能将铋基钙钛矿衍生物材料用作活性光催化剂。
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