Investigation of a conjugated polyelectrolyte interlayer for inverted polymer:fullerene solar cells

Ruidong Xia, Dong Seok Leem, Thomas Kirchartz, Steve Spencer, Craig Murphy, Zhicai He, Hongbin Wu, Shijian Su, Yong Cao, Ji Seon Kim, John C. Demello, Donal D.C. Bradley, Jenny Nelson

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Inverted bulk heterojunction solar cells are fabricated using a conjugated polyelectrolyte (PFN) as a cathode interlayer. Enhanced photovoltaic performance is achieved by adjusting the PFN thickness. Measurements of the optical transmittance, cathode work function (via UPS) and surface atomic composition (via XPS) provide insights into this optimization. Drift-diffusion simulations point to a reduction in recombination of holes at the cathode as the main cause for improving Voc. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
JournalAdvanced Energy Materials
Issue number6
StatePublished - Jun 1 2013
Externally publishedYes

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