Open AccessSurface-concentrated light and efficient carrier collection in microhole-patterned Si solar cells
Author(s) -
Sangho Kim,
Eunsongyi Lee,
Minkyu Ju,
Hyunyub Kim,
Junsin Yi,
SangJin Moon,
Moon Seop Hyun,
Dong-Wook Kim
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.00a607
Subject(s) - materials science , planar , optics , optoelectronics , photovoltaic system , solar cell , quantum efficiency , surface (topology) , silicon , physics , ecology , computer graphics (images) , geometry , mathematics , computer science , biology
We investigate photovoltaic characteristics of crystalline Si solar cells with microhole-patterned surface. We compare patterned samples with different hole-widths and periods with a planar counterpart. From the finite-difference time-domain simulation, the patterned and planar samples are expected to have similar short circuit current density, J(sc) (difference: 1.2%). In contrast, the difference in the measured J(sc) is as large as 12.6%. The simulated optical field patterns reveal that the sample with more significantly concentrated light near the surface has higher quantum efficiency due to more efficient carrier collection. We report the highest efficiency of 15.6% among the hole-patterned solar cells.