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Tenfold efficiency improvement of x-ray radioluminescent batteries basing on GAGG:Ce single crystal scintillators.
- Source :
-
Applied Physics Letters . 11/29/2021, Vol. 119 Issue 22, p1-6. 6p. - Publication Year :
- 2021
-
Abstract
- Low energy conversion efficiency and low output power are the major limiting factors of isotope batteries as miniature power supplies for the broad applications, such as micro-electromechanical systems and aerospace electronics. In this work, highly efficient x-ray radioluminescent batteries are demonstrated based on single-crystal scintillators and spectra-matched photovoltaic batteries. X-ray sources are chosen to reduce the backscattering loss, and cerium doped Gd3Al2Ga3O12 (GAGG:Ce) single-crystal scintillators are adopted to improve the radioluminescence efficiency and light coupling efficiency, for their high x-ray absorption ability and high light-yield. The bandgap of photovoltaic battery is also optimized to match the luminescence spectrum of GAGG:Ce to maximize the photovoltaic efficiency. An optimal radioluminescent battery is achieved with an output power of 13.4 μW/cm2 and a conversion efficiency of 1.28%, which is a 10.7-times improvement in the previous best reports (0.12%). This exciting progress indicates the promising potential of radioluminescent batteries in broad applications and will inspire the further exploration for the research community of radioisotope batteries. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 119
- Issue :
- 22
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 153959740
- Full Text :
- https://doi.org/10.1063/5.0073048