High-Efficiency Nanowire Solar Cells with Omnidirectionally Enhanced Absorption Due to Self-Aligned Indium–Tin–Oxide Mie Scatterers
Top Cited Papers
- 5 December 2016
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 10 (12), 11414-11419
- https://doi.org/10.1021/acsnano.6b06874
Abstract
Photovoltaic cells based on arrays of semiconductor nanowires promise efficiencies comparable or even better than their planar counterparts with much less material. One reason for the high efficiencies is their large absorption cross section, but until recently the photocurrent has been limited to less than 70% of the theoretical maximum. Here we enhance the absorption in indium phosphide (InP) nanowire solar cells by employing broadband forward scattering of self-aligned nanoparticles on top of the transparent top contact layer. This results in a nanowire solar cell with a photovoltaic conversion efficiency of 17.8% and a short-circuit current of 29.3 mA/cm2 under 1 sun illumination, which is the highest reported so far for nanowire solar cells and among the highest reported for III–V solar cells. We also measure the angle-dependent photocurrent, using time-reversed Fourier microscopy, and demonstrate a broadband and omnidirectional absorption enhancement for unpolarized light up to 60° with a wavelength average of 12% due to Mie scattering. These results unambiguously demonstrate the potential of semiconductor nanowires as nanostructures for the next generation of photovoltaic devices.Keywords
Funding Information
- Stichting voor Fundamenteel Onderzoek der Materie
- Ministerie van Economische Zaken
- Stichting voor de Technische Wetenschappen
This publication has 26 references indexed in Scilit:
- Efficiency Enhancement of InP Nanowire Solar Cells by Surface CleaningNano Letters, 2013
- Broadband omnidirectional antireflection coating based on subwavelength surface Mie resonatorsNature Communications, 2012
- Optimized Spatial Correlations for Broadband Light Trapping Nanopatterns in High Efficiency Ultrathin Film a-Si:H Solar CellsNano Letters, 2011
- Strong Geometrical Dependence of the Absorption of Light in Arrays of Semiconductor NanowiresACS Nano, 2011
- Coupling of Light into Nanowire Arrays and Subsequent AbsorptionJournal of Nanoscience and Nanotechnology, 2010
- Orientation-Dependent Optical-Polarization Properties of Single Quantum Dots in NanowiresSmall, 2009
- Engineering light absorption in semiconductor nanowire devicesNature Materials, 2009
- Optical Absorption Enhancement in Amorphous Silicon Nanowire and Nanocone ArraysNano Letters, 2009
- Improved broadband and quasi-omnidirectional anti-reflection properties with biomimetic silicon nanostructuresNature Nanotechnology, 2007
- Reduction of Lens Reflexion by the “Moth Eye” PrincipleNature, 1973