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Alcohol based vapor annealing of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) layer for performance improvement of inverted perovskite solar cells

Abstract

In this study, we introduced alcohol based vaporannealing of the poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) layer for fabricating high-performance inverted perovskite solar cells. Atomic force microscope measurements and atomistic theoretical simulations indicated that phase separation between PEDOT and PSS was enhanced by this annealing, improving the hole conductivity at the PEDOT:PSS layer. As a result of using methanol, the short-circuit current density improved from 20.7 to 21.6 mA cm−2; consequently, the power conversion efficiency (PCE) improved from 16.1 to 17.3%. However, using ethanol or isopropanol yielded a smaller performance improvement. The PCEs of the best sample in this study under forward and reverse scans were 17.7 and 18.0%, respectively, indicating that the PSC had a small hysteresis. Our results suggest that alcohol vapor annealing is a simple and effective method of developing high-performance inverted perovskite solar cells.

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Publication details

The article was received on 15 Mar 2018, accepted on 15 May 2018 and first published on 16 May 2018


Article type: Paper
DOI: 10.1039/C8NR02146E
Citation: Nanoscale, 2018, Accepted Manuscript
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    Alcohol based vapor annealing of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) layer for performance improvement of inverted perovskite solar cells

    G. Liu, X. Xie, Z. Liu, G. Cheng and E. Lee, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR02146E

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