A versatile solution-processed MoO3/Au nanoparticles/MoO3 hole contact for high performing PEDOT:PSS-free organic solar cells

Weidong Zhang, Weixia Lan, Min Hsuan Lee, Jai Singh, Furong Zhu

    Research output: Contribution to journalArticle

    Abstract

    Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) hole contact is widely used in organic solar cells (OSCs). In this work, we report the effort to develop a versatile solution-processed molybdenum trioxide (s-MoO3)/Au nanoparticles (NPs)/s-MoO3 (MAM) hole contact for application in PEDOT:PSS-free OSCs. The use of Au NPs is to improve the adhesion between the two s-MoO3 layers in the MAM hole contact. It shows that MAM hole contact enables to enhance the charge extraction through suppression of bimolecular recombination, and reduce the leakage current by improvement of contact property. Power conversion efficiency of 7.68% was obtained for MAM-based OSCs, with a blend system of poly[[4,8-bis[(2-ethylhexyl) oxy]benzo[1,2-b: 4,5-b’] dithiophene-2,6-diyl] [3-fluoro-2-[(2-ethylhexyl) carbonyl] thieno[3,4-b]-thiophenediyl]]: [6,6]- phenyl-C70-butyric-acid-methyl-ester, which is comparable to that of the PEDOT:PSS-based cells (7.48%). It demonstrates clearly that solution-processed MAM hole contact can be readily adopted to replace the widely used acidic PEDOT:PSS hole contact for application in PEDOT:PSS-free OSCs.

    Original languageEnglish
    Pages (from-to)1-6
    Number of pages6
    JournalOrganic Electronics: physics, materials, applications
    Volume52
    DOIs
    Publication statusPublished - Jan 2018

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