Intrinsic Defects, Fluctuations of the Local Shape, and the Photo- Oxidation of Black Phosphorus
作者： Kainen L. Utt , Pablo Rivero , Mehrshad Mehboudi , Edmund O. Harriss , Mario F. Borunda
DOI: 10.1021/ACSCENTSCI.5B00244
关键词: Oxidation process 、 Chemical physics 、 Chemisorption 、 Dissociation (chemistry) 、 Black phosphorus 、 Monatomic ion 、 Electronic properties 、 Materials science 、 Optics 、 Ultraviolet 、 Oxygen
摘要: Black phosphorus is a monatomic semiconducting layered material that degrades exothermically in the presence of light and ambient contaminants. Its degradation dynamics remain largely unknown. Even before degradation, local-probe studies indicate non-negligible local curvature—through nonconstant height distribution—due to unavoidable intrinsic defects. We establish these defects are photo-oxidation sites because they lower chemisorption barrier ideal black (>10 eV out visible-range excitations) right into visible ultraviolet range (1.6 6.8 eV), thus enabling photoinduced oxidation dissociation oxygen dimers. A full characterization material’s shape its electronic properties at early stages process presented as well. This study provides fundamental insights this novel material.
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