Layer-by-Layer Controlled Perovskite Nanocomposite Thin Films for Piezoelectric Nanogenerators
- Authors
- Kim, Younghoon; Lee, Keun Young; Hwang, Sun Kak; Park, Cheolmin; Kim, Sang-Woo; Cho, Jinhan
- Issue Date
- 29-10월-2014
- Publisher
- WILEY-V C H VERLAG GMBH
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.24, no.40, pp.6262 - 6269
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 24
- Number
- 40
- Start Page
- 6262
- End Page
- 6269
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/97046
- DOI
- 10.1002/adfm.201401599
- ISSN
- 1616-301X
- Abstract
- Perovskite nanoparticle-based nanocomposite thin films strictly tailored using unconventional layer-by-layer (LbL) assembly in organic media for piezoelectric nanogenerators (NGs) are demonstrated. By employing sub-20-nm BaTiO3 nanoparticles stabilized by oleic acid ligands (i.e., OA-BTONPs) and carboxylic acid (COOH)-functionalized polymers, such as poly(acrylic acid) (PAA), the resulting OA-BTONP/PAA nanocomposite multilayers are prepared by exploiting the high affinity between the COOH groups of PAA and the BTONPs. The ferroelectric and piezoelectric performance of the (PAA/OA-BTONP)(n) thin films can be precisely controlled by altering the bilayer number, inserted polymer type, and OA-BTONP size. It is found that the LbL assembly in nonpolar solvent media can effectively increase the quantity of adsorbed OA-BTONPs, resulting in the dramatic enhancement of electric power output from the piezoelectric NGs. Furthermore, very low leakage currents are detected from the (PAA/OA-BTONP)(n) thin films for obtaining highly reliable power-generating performance of piezoelectric NGs.
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