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直接生长在SrTiO/Si(001)上的外延单晶BiFeMnO薄膜的带隙

Bandgap of Epitaxial Single-Crystal BiFeMnO Films Grown Directly on SrTiO/Si(001).

作者信息

Cantrell Samuel R, Miracle John T, Cottier Ryan J, Lindsey Skyler, Theodoropoulou Nikoleta

机构信息

Materials Science Engineering and Commercialization Program, Texas State University, San Marcos, TX 78666, USA.

Department of Physics, Texas State University, San Marcos, TX 78666, USA.

出版信息

Materials (Basel). 2025 Apr 29;18(9):2022. doi: 10.3390/ma18092022.

DOI:10.3390/ma18092022
PMID:40363525
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12072848/
Abstract

We report the growth and optical characterization of single-crystal BiFeMnO thin films directly on SrTiO/Si(001) substrates using molecular beam epitaxy. X-ray diffraction confirmed epitaxial growth, film crystallinity, and sharp interface quality. Scanning electron microscopy and energy dispersive X-ray spectroscopy verified uniform film morphology and successful Mn incorporation. Spectroscopic ellipsometry revealed a systematic bandgap reduction with increasing Mn concentration, from 2.7 eV in BiFeO to 2.58 eV in BiFeMnO, consistent with previous reports on Mn-doped BiFeO. These findings highlight the potential of BiFe₋MnO films for bandgap engineering, advancing their integration into silicon-compatible multifunctional optoelectronic and photovoltaic applications.

摘要

我们报道了使用分子束外延技术直接在SrTiO/Si(001)衬底上生长单晶BiFeMnO薄膜及其光学特性。X射线衍射证实了外延生长、薄膜结晶度和清晰的界面质量。扫描电子显微镜和能量色散X射线光谱验证了薄膜形态均匀且成功掺入了锰。椭圆偏振光谱显示随着锰浓度的增加带隙系统地减小，从BiFeO中的2.7 eV降至BiFeMnO中的2.58 eV，这与之前关于锰掺杂BiFeO的报道一致。这些发现突出了BiFe₋MnO薄膜在带隙工程方面的潜力，推动了它们在硅兼容的多功能光电子和光伏应用中的集成。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/04d59aae4aad/materials-18-02022-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/78c7a613353e/materials-18-02022-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/8759291466e2/materials-18-02022-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/b90838e5b9d3/materials-18-02022-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/e6c98b3094db/materials-18-02022-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/774f92dc802b/materials-18-02022-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/7b4ae7d8f7c9/materials-18-02022-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/04d59aae4aad/materials-18-02022-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/78c7a613353e/materials-18-02022-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/8759291466e2/materials-18-02022-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/b90838e5b9d3/materials-18-02022-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/e6c98b3094db/materials-18-02022-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/774f92dc802b/materials-18-02022-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/7b4ae7d8f7c9/materials-18-02022-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad9a/12072848/04d59aae4aad/materials-18-02022-g007.jpg

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