Enhanced Power Conversion Efficiency of P3HT : PC₇₁BM Bulk Heterojunction Polymer Solar Cells by Doping a High-Mobility Small Organic Molecule

Figure 7

AFM morphology images of (a) P3HT : PC₇₁BM blend film and (b) P3HT : PC₇₁BM with a 0.6 wt% TIPS-pentacene doping ratio blend film. Corresponding AFM phase images ((c) and (d)) are shown below each respective morphology image. Image size is 5 μm × 5 μm.

(a)

(b)

(c)

(d)