Improved performance in GaInNAs solar cells by hydrogen passivation
- Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 W. Brooks St., Norman, Oklahoma 73019 (United States)
- Amethyst Research Inc., 123 Case Circle, Ardmore, Oklahoma 73401 (United States)
- CRHEA-CNRS, Rue Bernard Gregory, Valbonne 06560 (France)
The effect of UV-activated hydrogenation on the performance of GaInNAs solar cells is presented. A proof-of-principle investigation was performed on non-optimum GaInNAs cells, which allowed a clearer investigation of the role of passivation on the intrinsic nitrogen-related defects in these materials. Upon optimized hydrogenation of GaInNAs, a significant reduction in the presence of defect and impurity based luminescence is observed as compared to that of unpassivated reference material. This improvement in the optical properties is directly transferred to an improved performance in solar cell operation, with a more than two-fold improvement in the external quantum efficiency and short circuit current density upon hydrogenation. Temperature dependent photovoltaic measurements indicate a strong contribution of carrier localization and detrapping processes, with non-radiative processes dominating in the reference materials, and evidence for additional strong radiative losses in the hydrogenated solar cells.
- OSTI ID:
- 22398842
- Journal Information:
- Applied Physics Letters, Vol. 106, Issue 14; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE CARRIERS
COMPARATIVE EVALUATIONS
CURRENT DENSITY
GALLIUM ARSENIDES
HYDROGENATION
INDIUM NITRIDES
LUMINESCENCE
NITROGEN
OPTICAL PROPERTIES
PASSIVATION
PERFORMANCE
PHOTOVOLTAIC EFFECT
QUANTUM EFFICIENCY
SOLAR CELLS
TEMPERATURE DEPENDENCE
ULTRAVIOLET RADIATION