Growth of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> Single-Crystal Microbelts by the Optical Vapor Supersaturated Precipitation Method
Monoclinic <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelts were successfully fabricated using a one-step optical vapor supersaturated precipitation method, which exhibited advantages including a free-standing substrate, prefec...
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MDPI AG
2023-05-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/13/5/801 |
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| author | Yongman Pan Qiang Wang Yinzhou Yan Lixue Yang Lingyu Wan Rongcheng Yao Yijian Jiang |
| author_facet | Yongman Pan Qiang Wang Yinzhou Yan Lixue Yang Lingyu Wan Rongcheng Yao Yijian Jiang |
| author_sort | Yongman Pan |
| collection | DOAJ |
| description | Monoclinic <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelts were successfully fabricated using a one-step optical vapor supersaturated precipitation method, which exhibited advantages including a free-standing substrate, prefect surface, and low cost. The as-grown microbelts possessed a well-defined geometry and perfect crystallinity. The dimensions of individual <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelts were a width of ~50 μm, length of ~5 mm, and thickness of ~3 μm. The SEM, XRD, HRTEM, XPS, and Raman spectra demonstrated the high single-crystalline structure of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelts. Twelve frequency modes were activated in Raman spectra. The optical band gap of the <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelt was calculated to be ~4.45 eV. Upon 266 nm excitation, 2 strong UV emissions occurred in photoluminescence spectra through the radiative recombination of self-trapped excitons, and the blue emission band was attributed to the presence of donor-acceptor-pair transition. The individual <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelt was employed as metal-semiconductor-metal deep-ultraviolet photodetector, which exhibits the photoresponse under 254 nm. This work provides a simple and economical route to fabricate high-quality <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> single-crystal microbelts, which should be a potential synthetic strategy for ultra-wide bandgap semiconductor materials. |
| first_indexed | 2024-03-11T03:49:26Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T03:49:26Z |
| publishDate | 2023-05-01 |
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| record_format | Article |
| series | Crystals |
| spelling | doaj.art-292e8c60ffc248f783b06639004aa2f02023-11-18T01:00:08ZengMDPI AGCrystals2073-43522023-05-0113580110.3390/cryst13050801Growth of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> Single-Crystal Microbelts by the Optical Vapor Supersaturated Precipitation MethodYongman Pan0Qiang Wang1Yinzhou Yan2Lixue Yang3Lingyu Wan4Rongcheng Yao5Yijian Jiang6Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, ChinaCollege of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, ChinaInstitute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, ChinaSchool of Printing and Packing Engineer, Beijing Institute of Graphic Communication, Beijing 102627, ChinaSchool of Physical Science and Technology, Guangxi University, Nanning 530004, ChinaSchool of Physical Science and Technology, Guangxi University, Nanning 530004, ChinaInstitute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, ChinaMonoclinic <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelts were successfully fabricated using a one-step optical vapor supersaturated precipitation method, which exhibited advantages including a free-standing substrate, prefect surface, and low cost. The as-grown microbelts possessed a well-defined geometry and perfect crystallinity. The dimensions of individual <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelts were a width of ~50 μm, length of ~5 mm, and thickness of ~3 μm. The SEM, XRD, HRTEM, XPS, and Raman spectra demonstrated the high single-crystalline structure of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelts. Twelve frequency modes were activated in Raman spectra. The optical band gap of the <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelt was calculated to be ~4.45 eV. Upon 266 nm excitation, 2 strong UV emissions occurred in photoluminescence spectra through the radiative recombination of self-trapped excitons, and the blue emission band was attributed to the presence of donor-acceptor-pair transition. The individual <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelt was employed as metal-semiconductor-metal deep-ultraviolet photodetector, which exhibits the photoresponse under 254 nm. This work provides a simple and economical route to fabricate high-quality <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> single-crystal microbelts, which should be a potential synthetic strategy for ultra-wide bandgap semiconductor materials.https://www.mdpi.com/2073-4352/13/5/801<i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub>microbeltsOVSPphotoluminescencephotoconductivity |
| spellingShingle | Yongman Pan Qiang Wang Yinzhou Yan Lixue Yang Lingyu Wan Rongcheng Yao Yijian Jiang Growth of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> Single-Crystal Microbelts by the Optical Vapor Supersaturated Precipitation Method Crystals <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelts OVSP photoluminescence photoconductivity |
| title | Growth of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> Single-Crystal Microbelts by the Optical Vapor Supersaturated Precipitation Method |
| title_full | Growth of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> Single-Crystal Microbelts by the Optical Vapor Supersaturated Precipitation Method |
| title_fullStr | Growth of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> Single-Crystal Microbelts by the Optical Vapor Supersaturated Precipitation Method |
| title_full_unstemmed | Growth of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> Single-Crystal Microbelts by the Optical Vapor Supersaturated Precipitation Method |
| title_short | Growth of <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> Single-Crystal Microbelts by the Optical Vapor Supersaturated Precipitation Method |
| title_sort | growth of i β i i ga i sub 2 sub i o i sub 3 sub single crystal microbelts by the optical vapor supersaturated precipitation method |
| topic | <i>β</i>-<i>Ga</i><sub>2</sub><i>O</i><sub>3</sub> microbelts OVSP photoluminescence photoconductivity |
| url | https://www.mdpi.com/2073-4352/13/5/801 |
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