Optimal design for antireflective Si nanowire solar cells

Title
Optimal design for antireflective Si nanowire solar cells
Author
방진호
Keywords
Silicon nanowire; Solar cell; Antireflection; Light trapping; Metal-assisted electroless etching
Issue Date
2013-05
Publisher
Elsevier B.V
Citation
Solar Energy Materials and Solar Cells, May 2013, 112, P.84-90
Abstract
We suggest a design guideline that optimally combines light absorptance and electrical performance in silicon nanowire (SiNW) solar cells. The design was experimentally developed using a tradeoff relation between wire length and space-filling ratio. Increasing (or decreasing) the wire length decreases (or increases) the wire filling ratio required to achieve the same amount of light absorption. The superior antireflection characteristics of SiNW arrays stem from optical impedance matching. A wire length of 1.2μm suppressed light reflection enough to obtain 99% absorptance at a filling ratio of 38%. A short length (∼500nm) design using nanopillars rather than nanowires effectively diminished the surface and bulk recombinations to achieve a short circuit current of ∼30mA/cm2 while maintaining good light absorptance.
URI
https://www.sciencedirect.com/science/article/pii/S0927024813000287?via%3Dihub
ISSN
0927-0248
DOI
10.1016/j.solmat.2012.12.046
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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