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Investigation of Gold Quantum Dot/Plasmonic Gold Nanoparticle System for Improvement of Organic Solar Cells

Abstract

Light management allows enhancement of light harvesting in organic solar cells (OSCs). In this paper, we describe the investigation of OSCs enhanced by the synergistic effect of gold quantum dots (AuQDs) and localized surface plasmons, obtained by blending a AuQD layer and plasmonic gold nanoparticles (AuNPs) in a hole-transport layer (HTL). Different AuQDs emitting blue, green, and red fluorescence were examined in this study. OSCs were demonstrated with a structure comprising an ITO-coated glass substrate/AuQDs/PEDOT:PSS:AuNPs/P3HT:PCBM/Al. The UV–visible spectra, current density versus voltage characteristics, impedance spectra, and incident photon-to-current efficiency of the fabricated devices were evaluated. The results showed an enhancement of photovoltaic efficiency achieved by increasing the short-circuit current density (JSC) and power conversion efficiency (PCE) in comparison with the reference OSCs. The best synergistic effect was found with OSCs consisting of a green-emitting AuQD layer and a HTL containing AuNPs, resulting in the highest improvement in PCE of 13.0%. This indicated that the increase in light harvesting in the developed devices was induced by extended light absorption in the UV region resulting from absorption by the AuQD layer and emission of visible fluorescence from the AuQD layer to the photoactive layers. Moreover, the localized surface plasmon effect of AuNPs, which also contributed to an increase in light trapping in the proposed OSCs, was enhanced by the effect of the AuQDs.

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Publication details

The article was received on 01 Aug 2018, accepted on 07 Nov 2018 and first published on 08 Nov 2018


Article type: Paper
DOI: 10.1039/C8NA00119G
Citation: Nanoscale Adv., 2019, Accepted Manuscript
  • Open access: Creative Commons BY license
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    Investigation of Gold Quantum Dot/Plasmonic Gold Nanoparticle System for Improvement of Organic Solar Cells

    S. Phetsang, A. Pangdam, C. Lertvachirapaiboon, R. Ishikawa, K. Shinbo, K. Kato, P. Mungkornasawakul, K. Ounnunkad and A. Baba, Nanoscale Adv., 2019, Accepted Manuscript , DOI: 10.1039/C8NA00119G

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