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Title: Increasing photon absorption and stability of PbS quantum dot solar cells using a ZnO interlayer

We compared PbS quantum dot (QD) solar cells with different cathode interlayer materials, namely, LiF and ZnO nanoparticles, using the same device structure. Solar cells fabricated with the ZnO interlayer gave a power conversion efficiency of 4.8%, which is higher (above the experimental variation) than the 4.1% efficiency obtained with a LiF interlayer. We found that the ZnO interlayer alters the spatial distribution of the optical field, leading to an increase in external quantum efficiency in the visible range. Furthermore, devices with ZnO as interlayer showed more stable performance than the ones using LiF, with practically no power conversion efficiency degradation after 1 month inside a N{sub 2} glovebox.
Authors:
; ;  [1] ; ;  [2] ; ;  [3] ;  [4] ;  [5]
  1. Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, Groningen 9747 AG (Netherlands)
  2. Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan (China)
  3. Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zurich 8049 (Switzerland)
  4. (Switzerland)
  5. Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan (China)
Publication Date:
OSTI Identifier:
22486021
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; AUGMENTATION; CATHODES; LEAD SULFIDES; LITHIUM FLUORIDES; NANOPARTICLES; PHOTONS; QUANTUM DOTS; QUANTUM EFFICIENCY; SOLAR CELLS; SPATIAL DISTRIBUTION; STABILITY; ZINC OXIDES