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나노 구조 물리 연구단
나노구조물리 연구단
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Highly efficient flexible piezoelectric nanogenerator and femtosecond two-photon absorption properties of nonlinear lithium niobate nanowires

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Title
Highly efficient flexible piezoelectric nanogenerator and femtosecond two-photon absorption properties of nonlinear lithium niobate nanowires
Author(s)
Manoj Kumar Gupta; Janardhanakurup Aneesh; Rajesh Yadav; K. V. Adarsh; Sang-Woo Kim
Publication Date
2017-05
Journal
JOURNAL OF APPLIED PHYSICS, v.121, no.17, pp.175103 -
Publisher
AMER INST PHYSICS
Abstract
We present a high performance flexible piezoelectric nanogenerator (NG) device based on the hydrothermally grown lead-free piezoelectric lithium niobate (LiNbO3) nanowires (NWs) for scavenging mechanical energies. The non-linear optical coefficient and optical limiting properties of LiNbO3 were analyzed using femtosecond laser pulse assisted two photon absorption techniques for the first time. Further, a flexible hybrid type NG using a composite structure of the polydimethylsiloxane polymer and LiNbO3 NWs was fabricated, and their piezoelectric output signals were measured. A large output voltage of similar to 4.0V and a recordable large current density of about 1.5 mu A cm(-2) were obtained under the cyclic compressive force of 1 kgf. A subsequent UV-Vis analysis of the as-prepared sample provides a remarkable increase in the optical band gap (UV absorption cut-off, similar to 251 nm) due to the nanoscale size effect. The high piezoelectric output voltage and current are discussed in terms of large band gap, significant nonlinear optical response, and electric dipole alignments under poling effects. Such high performance and unique optical properties of LiNbO3 show its great potential towards various next generation smart electronic applications and self-powered optoelectronic devices. (c) Published by AIP Publishing
URI
https://pr.ibs.re.kr/handle/8788114/3697
ISSN
0021-8979
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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