Highly Stable and Panchromatic Light Absorbing Cs2OsX6 (X = Cl-, Br-, I-) Vacancy Ordered Perovskites as Photoanodes for Solar Water Oxidation

被引：9
|
作者：
Shanmugam, Nandhini [1 ]
Halpati, Jigar Shaileshkumar [1 ]
Chandiran, Aravind Kumar [1 ,2 ]
机构：
[1] Indian Inst Technol Madras, Dept Chem Engn, Chennai 600036, Tamil Nadu, India
[2] Indian Inst Technol Madras, Ctr Photo & Electrochem Energy, Chennai 600036, Tamil Nadu, India
来源：
ADVANCED MATERIALS INTERFACES | 2023年 / 10卷 / 02期
关键词：
halide perovskites; photo-anode; photo-electrochemical water oxidation; stability; vacancy-ordered halide perovskite; water splitting; CIRCULAR-DICHROISM SPECTRA; RAMAN-SPECTRA; ELECTRONIC-STRUCTURE; COMPLEXES; ABSORPTION; MECHANISM; TIO2;
D O I：
10.1002/admi.202201526
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this work, osmium-based vacancy-ordered double perovskites Cs2OsX6 (X = Cl-, Br-, I-) are reported and the role of halides on stability, optical and photoelectrochemical properties is investigated. All these three materials crystallize in a cubic phase like Cs2SnX6 or Cs2PtX6 and possess extraordinary stability in ambient conditions and remain stable in strong acids and bases (from pH 1 to 11). One of the unique properties of these materials is that they show panchromatic visible and NIR absorption (up to 1200 nm) through ligand-to-metal [X (Cl-/Br-/I-) to Os] charge transfer and another NIR absorption between 1800 and 2500 nm due to Os d-d transition. Their pH stability and panchromatic light absorption properties enabled them to be employed as photoanodes in PEC water-splitting devices.
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页数：8
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