Open AccessOptical properties of Si microwires combined with nanoneedles for flexible thin film photovoltaics
Author(s) -
Kwang-Tae Park,
Zhongyi Guo,
HanDon Um,
JinWoo Jung,
Jun Mo Yang,
Sung Kyu Lim,
Young Su Kim,
Jung-Ho Lee
Publication year - 2010
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.19.000a41
Subject(s) - materials science , substrate (aquarium) , silicon , optoelectronics , etching (microfabrication) , photovoltaics , optics , coating , thin film , solar cell , absorption (acoustics) , reflection (computer programming) , anti reflective coating , nanotechnology , composite material , layer (electronics) , photovoltaic system , ecology , oceanography , physics , computer science , biology , programming language , geology
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.