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Title: Uncovering loss mechanisms in silver nanoparticle-blended plasmonic organic solar cells
Authors: Wu, Bo
Wu, Xiangyang
Guan, Cao
Tai, Kong Fai
Yeow, Edwin Kok Lee
Fan, Hong Jin
Mathews, Nripan
Sum, Tze Chien
Issue Date: 2013
Source: Wu, B., Wu, X., Guan, C., Tai, K. F., Yeow, E. K. L., Fan, H. J., et al. (2013). Uncovering loss mechanisms in silver nanoparticle-blended plasmonic organic solar cells. Nature Communications, 4.
Series/Report no.: Nature communications
Abstract: There has been much controversy over the incorporation of organic-ligand-encapsulated plasmonic nanoparticles in the active layer of bulk heterojunction organic solar cells, where both enhancement and detraction in performance have been reported. Here through comprehensive transient optical spectroscopy and electrical characterization, we demonstrate evidence of traps responsible for performance degradation in plasmonic organic solar cells fabricated with oleylamine-capped silver nanoparticles blended in the poly (3-hexylthiophene):[6,6]-phenyl-C 61-butyric acid methyl ester active layer. Despite an initial increase in exciton generation promoted by the presence of silver nanoparticles, transient absorption spectroscopy revealed no increase in the later free polaron population—attributed to fast trapping of polarons by nearby nanoparticles. The increased trap-assisted recombination is also reconfirmed by light intensity-dependent electrical measurements. These new insights into the photophysics and charge dynamics of plasmonic organic solar cells would resolve the existing controversy and provide clear guidelines for device design and fabrication.
ISSN: 2041-1723
DOI: 10.1038/ncomms3004
Rights: © 2013 Macmillan Publishers Limited. This is the author created version of a work that has been peer reviewed and accepted for publication by Nature Communications, Macmillan Publishers Limited. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at DOI: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles
MSE Journal Articles
SPMS Journal Articles

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