Oxygen in antimony triselenide: An IR absorption study
Oxygen in antimony triselenide: An IR absorption study
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DOI：
10.1063/5.0095547
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发表时间：
2022-05
影响因子：
4
通讯作者：
F. Herklotz;E. Lavrov;T. Hobson;J. Major;K. Durose
中科院分区：
文献类型：
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作者：
F. Herklotz;E. Lavrov;T. Hobson;J. Major;K. Durose
用红外(IR)吸收光谱研究了单晶Sb_2Se_3中的氧。对掺有16O的Sb_2Se_3样品的测量表明，在527 cm−1(10K)处有一条红外吸收线。将16O替换为18O“红色”-将信号向下移至500厘米−1，根据该信号将谱线分配给孤立氧缺陷的局部振动模式。富氧样品在高于380C的氢气气氛中热处理后，527厘米的−1谱线被抑制，同时出现了由于羟基而产生的信号，表明形成了氧-氢络合物。讨论了527 cm−-1氧中心的构型。
Oxygen in single crystalline antimony triselenide (Sb2Se3) is addressed by infrared (IR) absorption spectroscopy. Measurements conducted on Sb2Se3 samples doped—during growth, post-growth annealing in the O2 ambient, or by O ion implantation—with 16O reveal an IR absorption line at 527 cm−1 (10 K). Substitution of 16O by 18O “red”-shifts the signal down to 500 cm−1 based on which the line is assigned to a local vibrational mode of an isolated oxygen defect. Annealing of O-enriched samples in hydrogen atmosphere at temperatures above 380 °C results in the suppression of the 527-cm−1 line and concurrent appearance of the signals due to hydroxyl groups, suggesting formation of oxygen-hydrogen complexes. The configuration of the 527-cm−1 oxygen center is discussed.