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Mixed solvents for the optimization of morphology in solution-processed, inverted-type perovskite/fullerene hybrid
Hak-Beom Kim1, Hyosung Choi, Jaeki Jeong
1School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea. jykim@unist.ac.kr.
Abstract:
We investigate mixed solvents of N,N-dimethylformamide (DMF) and γ-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.
