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AlGaAs 55Fe X-ray radioisotope microbattery
journal contribution
posted on 2023-06-09, 04:19 authored by Silvia Butera, Michael WhitakerMichael Whitaker, Grammatiki LioliouGrammatiki Lioliou, Anna BarnettAnna BarnettThis paper describes the performance of a fabricated prototype Al0.2Ga0.8As 55Fe radioisotope microbattery photovoltaic cells over the temperature range -20 °C to 50 °C. Two 400 µm diameter p+-i-n+ (3 µm i-layer) Al0.2Ga0.8As mesa photodiodes were used as conversion devices in a novel X-ray microbattery prototype. The changes of the key microbattery parameters were analysed in response to temperature: the open circuit voltage, the maximum output power and the internal conversion efficiency decreased when the temperature was increased. At -20 °C, an open circuit voltage and a maximum output power of 0.2 V and 0.04 pW, respectively, were measured per photodiode. The best internal conversion efficiency achieved for the fabricated prototype was only 0.95% at -20 °C.
Funding
High Efficiency Betavoltaic Cells; G1455; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M002772/1
History
Publication status
- Published
File Version
- Published version
Journal
Scientific ReportsISSN
2045-2322Publisher
Nature Publishing GroupExternal DOI
Volume
6Page range
38409Department affiliated with
- Engineering and Design Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2016-12-06First Open Access (FOA) Date
2016-12-06First Compliant Deposit (FCD) Date
2016-12-06Usage metrics
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