Plasmonics in PV – Part 2 Arno Smets PVMD Delft University of Technology
Plasmonics in solar cells: learning objectives NPs behind Ag scattering
NPs behind the absorber: back reflector electric fields: incident total + = reflected
calculated driving field at NP measured: • absorbance A BR (=1-R tot ) • diffuse reflectance R dif
NP size and shape plasmonic Tan, Nano Letters 12 (2012) 4070
a-Si:H solar cell on plasmonic BR
nc-Si:H solar cell on plasmonic BR Tan, APL 102 (2013) 153902
Plasmonic white paint Basch, APL 100 (2012) p. 243903 Ag Santbergen, 39 th IEEE PVSC (2013) p. 29 + TiO 2 R back 92% 72% 95% 17° 35° 42°
Conclusions Ag Ag Ag Ag near-field enh. light trapping anti-reflection scattering ARC works many issues outcoupling better Large NPs (> 100 nm) in back reflector – TF-Si:high haze but some absorption in Ag – c-Si: combined with TiO 2 particles à broad scattering
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