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Título:
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Micro-opto-electro-mechanical device based on flexible beta-Ga_2O_3 micro-lamellas
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Autores:
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Peres, Marco ;
Fernandes, A.J.S. ;
Oliveira, F.J. ;
Alves, L.C. ;
Alves, E. ;
Monteiro, T.S. ;
Cardoso, S. ;
Alonso Orts, Manuel ;
Nogales Díaz, Emilio ;
Méndez Martín, Bianchi
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Tipo de documento:
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texto impreso
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Editorial:
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Electrochemical Society, 2019-06-24
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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A thermal actuator based on thin flexible lamellas of Ga_2O_3 was designed in order to demonstrate the potential of this semiconductor for micro-opto-electro-mechanical applications (MOEMs). The working principle of these devices is based on the thermal expansion that induces a vertical movement resultant of the lamella elongation due the self-heating/Joule effect. Upon excitation with photons, electrons or ions, intrinsic luminescence bands associated with self-trapped excitons and donor-acceptor pair recombination dominate the emission spectrum. When a current passes through the device, simultaneously with the thermal expansion, this luminescence is strongly quenched. Based on systematic Photoluminescence and Raman studies as a function of temperature and as a function of the applied power it is demonstrated that the observed luminescence quenching is directly related with the Joule heating effect. This work presents for the first time a thermal actuator based on Ga_2O_3 and it intends to be a stimulus for future works on MOEMs applications based on this semiconductor.
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En línea:
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https://eprints.ucm.es/57106/1/MendezBianchi100libre%2BCC.pdf
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