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Fig. 2 | Nanoscale Research Letters

Fig. 2

From: Fundamental Study on the Fabrication of Inverted Planar Perovskite Solar Cells Using Two-Step Sequential Substrate Vibration-Assisted Spray Coating (2S-SVASC)

Fig. 2

SEM images of PEDOT: PSS thin films, prepared by spin coating: a as-spun wet film vibrated on an ultrasonic transducer, using the SVPT method, operating at 5 W for 15 s, before thermal processing. b The wet film was dried and cured naturally. The wet films were subjected to heat treatment at 120 °C for 35 min

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