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AlGaAs 55Fe X-ray radioisotope microbattery

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posted on 2023-06-09, 04:19 authored by Silvia Butera, Michael WhitakerMichael Whitaker, Grammatiki LioliouGrammatiki Lioliou, Anna BarnettAnna Barnett
This 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 Reports

ISSN

2045-2322

Publisher

Nature Publishing Group

Volume

6

Page range

38409

Department affiliated with

  • Engineering and Design Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-12-06

First Open Access (FOA) Date

2016-12-06

First Compliant Deposit (FCD) Date

2016-12-06

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