AlGaAs 55Fe X-ray radioisotope microbattery

Butera, S, Whitaker, M D C, Lioliou, G and Barnett, A M (2016) AlGaAs 55Fe X-ray radioisotope microbattery. Scientific Reports, 6. p. 38409. ISSN 2045-2322

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Abstract

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.

Item Type: Article
Keywords: AlGaAs; X-ray voltaic; semiconductors
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: Q Science > QC Physics
Depositing User: Silvia Butera
Date Deposited: 06 Dec 2016 14:47
Last Modified: 06 Mar 2017 15:44
URI: http://sro.sussex.ac.uk/id/eprint/65829

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Project NameSussex Project NumberFunderFunder Ref
High Efficiency Betavoltaic CellsG1455STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/M002772/1