Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 18, Issue 27, Pages 18500-18506Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp02373h
Keywords
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Funding
- Japan Society for the Promotion of Science (JSPS), Japan (JSPS)-Thailand (NRCT) bilateral joint research program [25390051]
- Chulalongkorn University fund (Ratchadaphiseksomphot Endowment Fund)
- Graduate School, Chulalongkorn University, Bangkok, Thailand
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Grants-in-Aid for Scientific Research [16K13662, 26420301] Funding Source: KAKEN
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In this study, urchin-like gold nanoparticles (UL-AuNPs) are used in the fabrication of organic thin-film solar cells (OSCs). UL-AuNPs, which have gold nanothorns on their surface, enhance light accumulation by acting as light-trapping materials. This is due to the enhanced electric field and light scattering attributed to the nanothorns on the surface of the nanoparticles. UL-AuNPs were incorporated into a poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) thin-film layer of organic thin-film solar cells (OSCs). UV-vis spectra, atomic force microscopy (AFM) images, current density versus voltage properties, and the impedance spectra of the fabricated devices were recorded at various concentrations of UL-AuNPs. We found that the efficiency of the OSCs with UL-AuNPs was not only higher than that of a reference cell without nanoparticles but also higher than that of OSCs with spherical AuNPs. Finite-difference time-domain (FDTD) simulation indicated that the electric field around the UL-AuNPs increased due to the presence of nanothorns.
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