Enhanced nanocrystalline silicon solar cell with a photonic crystal back-reflector

TitleEnhanced nanocrystalline silicon solar cell with a photonic crystal back-reflector
Publication TypeJournal Article
Year of Publication2010
AuthorsBiswas R, Bhattacharya J, Lewis B, Chakravarty N, Dalal V
Journal TitleSolar Energy Materials and Solar Cells
Volume94
Pages2337-2342
Date Published12
ISBN Number0927-0248
Accession NumberISI:000283959500056
Keywordsabsorption enhancement, light-trapping, NANOCRYSTALLINE SILICON, PHOTONIC CRYSTAL, solar cell
Abstract

Nanocrystalline silicon solar cells were enhanced with a photonic crystal back-reflector. Rigorous scattering matrix simulations were used to optimize a photonic crystal back-reflector consisting of a triangular lattice of nano-holes, with a pitch near 800 nm. The photonic crystal back-reflector with a pitch of 800 nm was fabricated on the crystalline silicon substrate by photolithography and reactive-ion etching, and coated with silver and zinc oxide. Nanocrystalline silicon solar cells were grown on the patterned substrates. We observed similar to 7% enhancement of the absorption and photo-generated current relative to a Ag/ZnO substrate, with an enhancement ratio of 1.5 near the band edge. Significant enhancement occurred in photon absorption at near infrared wavelengths greater than 700 nm, due to diffraction resonances of the incoming light. (C) 2010 Elsevier B.V. All rights reserved.

URL<Go to ISI>://000283959500056http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6V51-511KB2H-1-C&_cdi=5773&_user=716796&_pii=S0927024810004642&_origin=search&_coverDate=12%2F31%2F2010&_sk=999059987&view=c&wchp=dGLbVzb-zSkWb&md5=bf04153253f9dd6c48bff
DOI10.1016/J.Solmat.2010.08.007
Alternate JournalSol Energ Mat Sol C