authors |
Peres, M; Fernandes, AJS; Oliveira, FJ; Alves, LC; Alves, E; Monteiro, TS; Cardoso, S; Alonso-Orts, M; Nogales, E; Mendez, B; Villora, EG; Shimamura, K; Lorenz, K |
nationality |
International |
journal |
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY |
keywords |
SINGLE-CRYSTALS; OPTICAL-ABSORPTION; LUMINESCENCE; FIELD |
abstract |
A thermal actuator based on thin flexible lamellas of Ga2O3 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 Ga2O3 and it intends to be a stimulus for future works on MOEMs applications based on this semiconductor. (c) The Author(s) 2019. Published by ECS. |
publisher |
ELECTROCHEMICAL SOC INC |
issn |
2162-8769 |
isbn |
2162-8777 |
year published |
2019 |
volume |
8 |
issue |
7 |
beginning page |
Q3235 |
ending page |
Q3241 |
digital object identifier (doi) |
10.1149/2.0441907jss |
web of science category |
Materials Science, Multidisciplinary; Physics, Applied |
subject category |
Materials Science; Physics |
unique article identifier |
WOS:000472797800001
|
ciceco authors
impact metrics
journal analysis (jcr 2019):
|
journal impact factor |
2.142 |
5 year journal impact factor |
1.815 |
category normalized journal impact factor percentile |
45.452 |
dimensions (citation analysis):
|
|
altmetrics (social interaction):
|
|
|