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説明:

High-quality Cu2O single crystals were grown in CuCl flux, utilizing an Al2O3 or MgO crucible and a slow-cooling technique. The resultant crystals exhibited a well-faceted cubic morphology, each with dimensions in the order of a few micrometers. The bandgap of Cu2O was evaluated by diffuse reflectance spectroscopy and photoluminescence measurement using single crystals. The measured bandgap (Eg ≒ 1.95 eV) was marginally lower than the widely reported value. However, this measured value could be reasonably asserted to be representative of the intrinsic bandgap because the single crystals experienced minimal strain from the substrate, and the optical absorbance (α/S) data displayed no arbitrariness.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Cu2O, Single crystal, Flux method, Bandgap

刊行年月日: 2024-04-06

出版者: Elsevier BV

掲載誌:

• Materials Letters (ISSN: 0167577X) vol. 365 136428

研究助成金:

• Japan Society for the Promotion of Science 19H05790

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.matlet.2024.136428

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更新時刻: 2024-04-26 08:38:31 +0900

MDRでの公開時刻: 2024-04-26 08:30:11 +0900