Periodic anti-ring back reflectors for hydrogenated amorphous silicon thin-film solar cells
Journal
Optics Express
Journal Volume
22
Journal Issue
SUPPL. 4
Pages
A1128-A1136
Date Issued
2014
Author(s)
Chen P.-Y.
Hsiao H.-H.
Ho C.-I.
Ho C.-C.
Lee W.-L.
Chang H.-C.
Lee S.-C.
Chen J.-Z.
Abstract
Large and periodic anti-ring arrays are fabricated by using a monolayer of polymer/nanosphere hybrid technique and applied as back reflectors in substrate-type hydrogenated amorphous silicon (a-Si:H) thinfilm solar cells. The structure of each anti-ring comprises a nanodome centered inside a nanohole. The excitation of Bloch wave surface plasmon polaritons is observed in the Ag-coated anti-ring arrays. The nanodomes of the anti-ring arrays turn out to enhance large-angle light scattering and increase the effective optical path in the solar cell. The resulting efficiency of an ultrathin a-Si:H (thickness: 150 nm) solar cell is enhanced by 39% compared to that with a flat back reflector and by 13% compared to that with a nanohole back reflector. ? 2014 Optical Society of America.
Type
journal article