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Temperature effects on an InGaP (GaInP) 55Fe X-ray photovoltaic cell
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posted on 2023-06-09, 07:06 authored by Silvia Butera, Michael WhitakerMichael Whitaker, A B Krysa, Anna BarnettAnna BarnettThis 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.
Funding
High Efficiency Betavoltaic Cells; G1455; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M002772/1
STFC; ST/P001815/1
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- Published
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- Published version
Journal
Scientific ReportsISSN
2045-2322Publisher
Nature Publishing GroupExternal DOI
Volume
7Article number
a4981Department affiliated with
- Engineering and Design Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-07-10First Open Access (FOA) Date
2017-07-10First Compliant Deposit (FCD) Date
2017-07-10Usage metrics
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