4.8 Article

Mixed solvents for the optimization of morphology in solution-processed, inverted-type perovskite/fullerene hybrid solar cells

Journal

NANOSCALE
Volume 6, Issue 12, Pages 6679-6683

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr00130c

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Funding

  1. National Research Foundation of Korea Grant [NRF-2009-0093020, NRF-2013R1A2A2A01015342]
  2. BK21 Plus Program (META-material-based Energy Harvest and Storage Technologies) - Ministry of Education (MOE, Korea) [10Z20130011057]
  3. National Research Foundation of Korea (NRF)

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We investigate mixed solvents of N,N-dimethylformamide (DMF) and gamma-butyrolactone (GBL) to produce the smooth surface of a perovskite film and uniform crystal domains. This ideal morphology from mixed solvents enhances the power conversion efficiency to over 6% by improving the exciton dissociation efficiency and reducing the recombination loss at both interfaces of PEDOT:PSS/perovskite and perovskite/PCBM.

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