Optical properties of Si microwires combined with nanoneedles for flexible thin film photovoltaics.
A combined wire structure, made up of longer periodic Si microwires and short nanoneedles, was prepared to enhance light absorption using one-step plasma etching via lithographical patterning. The combined wire array exhibited light absorption of up to ~97.6% from 300 to 1100 nm without an anti-reflection coating. These combined wire arrays on a Si substrate were embedded into a transparent polymer. A large-scale wire-embedded soft film was then obtained by peeling the polymer-embedded wire portion from the substrate. Optically attractive features were present in these soft films, making them suitable for use in flexible silicon solar cell applications.
1Department of Bio-Nano Technology, Hanyang University, Ansan 426-791, Korea.
Kwang-Tae
KT
Park
Zhongyi
Z
Guo
Han-Don
HD
Um
Jin-Young
JY
Jung
Jun Mo
JM
Yang
Sung Kyu
SK
Lim
Young Su
YS
Kim
Jung-Ho
JH
Lee