Study of intense photoluminescence from monodispersed β-Ga2O3 ellipsoidal structures
| Autor: | Marcelo Ornaghi Orlandi, Aline Varella Rodrigues |
|---|---|
| Přispěvatelé: | Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2019 |
| Předmět: |
Ostwald ripening
Materials science Photoluminescence 02 engineering and technology 01 natural sciences symbols.namesake Dynamic light scattering 0103 physical sciences Materials Chemistry Emission spectrum Fourier transform infrared spectroscopy 010302 applied physics Optical properties Process Chemistry and Technology 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials Surfaces Transmission electron microscopy Ceramics and Composites symbols Physical chemistry Defects Calcination 0210 nano-technology Raman spectroscopy Porosity Monoclinic crystal system |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 0272-8842 |
| Popis: | Made available in DSpace on 2019-10-06T15:26:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-03-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Monoclinic β-Ga2O3 particles were obtained through the self-assembly mechanism of nanosheets at different temperatures. An ellipsoidal morphology was obtained through precipitation and calcination processes. The influence of synthesis on the structure and morphology of materials was investigated using X-ray diffraction, scanning and transmission electron microscopy, dynamic light scattering, Raman and Fourier-transform infrared (FTIR) spectroscopies. The ellipsoidal morphologies with mesoporous were led by the Ostwald ripening and self-assembly mechanisms. An investigation into their optical properties revealed very broad and intense photoluminescence emission spectra, which were explained by the presence of oxygen vacancies in the structures. The specific surface areas were found to influence emission intensities. Different vibrations of Ga–O bonds in the Raman and FTIR spectra demonstrated two types of Ga3+ ions (GaO6 octahedral and GaO4 tetrahedral chains). The successful synthesis and the high emission intensities in the blue spectral range are representative of the strong potential of β-Ga2O3 particles in the use of optoelectronic devices as light-emitting materials. UNESP-São Paulo State University Department of Physical-Chemistry UNESP-São Paulo State University Department of Physical-Chemistry FAPESP: #2015/50526-4 FAPESP: #2017/26219-0 CNPq: #443138/2016-8 CNPq: #447760/2014-9 |
| Databáze: | OpenAIRE |
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