Temperature effects on an InGaP (GaInP) 55Fe X-ray photovoltaic cell

Butera, S, Whitaker, M D C, Krysa, A B and Barnett, A M (2017) Temperature effects on an InGaP (GaInP) 55Fe X-ray photovoltaic cell. Scientific Reports, 7. a4981. ISSN 2045-2322

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Abstract

This paper investigates the effects of temperature on an InGaP (GaInP) 55Fe X-ray photovoltaic cell prototype for a radioisotope microbattery (also called a nuclear microbattery). An In0.5Ga0.5P p-i-n (5 μm i-layer) mesa photodiode was illuminated by a standard 206 MBq 55Fe radioisotope X-ray source and characterised over the temperature range −20 °C to 100 °C. The electrical power output of the device reached its maximum value of 1.5 pW at a temperature of −20 °C. An open circuit voltage and a short circuit current of 0.82 V and 2.5 pA, respectively, were obtained at −20 °C. While the electrical power output and the open circuit voltage decreased with increasing temperature, an almost flat trend was found for the short circuit current. The cell conversion efficiency decreased from 2.1% at −20 °C to 0.7% at 100 °C.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: Q Science > QC Physics
Depositing User: Silvia Butera
Date Deposited: 10 Jul 2017 10:26
Last Modified: 10 Jul 2017 10:49
URI: http://sro.sussex.ac.uk/id/eprint/69156

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Project NameSussex Project NumberFunderFunder Ref
High Efficiency Betavoltaic CellsG1455STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/M002772/1
UnsetUnsetSTFCST/P001815/1