Fig. 2: Optimization of the bulk heterojunction.
From: Photovoltaic organic interface for neuronal stimulation in the near-infrared
a, b Mean (±s.e.m., n = 4 chips) PCD (a) and PV (b) with HTL/P3HT:PC60BM/Ti. c, d Mean (±s.e.m., n = 3 chips) PCD (c) and PV (d) with HTL/PCPDTBT:PC60BM/Ti. In a–d, the vertical dotted lines represent the normalized irradiance levels respectively for 565 nm (green, 1 mW mm−2), 730 nm (red, 6 mW mm−2), and 780 nm (magenta, 7.5 mW mm−2). The solid lines are the interpolations with an asymmetrical, five-parameter, logistic dose-response function for PCDs and a hyperbola function for PVs. e, f Grand-average PCD (e) and PV (f) traces with HTL/P3HT:PC60BM/Ti (dashed line, 565 nm, n = 4 chips) and HTL/PCPDTBT:PC60BM/Ti (solid line, 730 nm, n = 3 chips) BHJs respectively at their normalized irradiance levels. g, Mean (±s.e.m.) PCD and PV obtained with HTL/P3HT:PC60BM/Ti (white bars, 565 nm, n = 4 chips) and HTL/PCPDTBT:PC60BM/Ti (black bars, 730 nm, n = 3 chips) respectively at their normalized irradiance levels.
