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Gallium Nitride Schottky betavoltaic nuclear batteries
- Source :
- Energy Conversion and Management. 52:1955-1958
- Publication Year :
- 2011
- Publisher :
- Elsevier BV, 2011.
-
Abstract
- Gallium Nitride (GaN) Schottky betavoltaic nuclear batteries (GNBB) are demonstrated in our work for the first time. GaN films are grown on sapphire substrates by metalorganic chemical vapor deposition (MOCVD), and then GaN Schottky diodes are fabricated by normal micro-fabrication process. Nickel with mass number of 63 ( 63 Ni), which emits β particles, is loaded on the GaN Schottky diodes to achieve GNBB. X-ray diffraction (XRD) and photoluminescence (PL) are carried out to investigate the crystal quality for the GaN films as grown. Current–voltage ( I – V ) characteristics shows that the GaN Schottky diodes are not jet broken down at −200 V due to consummate fabrication processes, and the open circuit voltage of the GNBB is 0.1 V and the short circuit current density is 1.2 nA cm −2 . The limited performance of the GNBB is due to thin effective energy deposition layer, which is only 206 nm to absorb very small partial energy of the β particles because of the relatively high dislocation density and carrier concentration. However, the conversion efficiency of 0.32% and charge collection efficiency (CCE) of 29% for the GNBB have been obtained. Therefore, the output power of the GNBB are expected to greatly increase with growing high quality thick GaN films.
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
business.industry
Energy conversion efficiency
Energy Engineering and Power Technology
Schottky diode
Gallium nitride
Chemical vapor deposition
Nitride
chemistry.chemical_compound
Fuel Technology
Nuclear Energy and Engineering
chemistry
Optoelectronics
Metalorganic vapour phase epitaxy
Thin film
business
Short circuit
Subjects
Details
- ISSN :
- 01968904
- Volume :
- 52
- Database :
- OpenAIRE
- Journal :
- Energy Conversion and Management
- Accession number :
- edsair.doi...........532bf5dc401d435a63b56e85cd3b2ac0