Figure 4From: Effects of pentacene-doped PEDOT:PSS as a hole-conducting layer on the performance characteristics of polymer photovoltaic cellsAFM images of pentacene-doped PEDOT:PSS films. Annealed at (a) 120°C, (b) 140°C, (c) 160°C, and (d) 180°C for 1 h.Back to article page