Fig. 7
From: Impact of polymorphism on the optoelectronic properties of a low-bandgap semiconducting polymer
Field-effect transistors and solar cells of the two polymorphs. a Transfer characteristics of D-PDPP4T-HD field-effect transistors for the β1 and β2 polymorphs processed from chloroform:1,2,4-trichlorobenzene (CF:TCB) solutions (1:0) and (2:1). b Average (6 devices) field-effect mobility as a function of TCB content. Error bars are standard deviation. c, d, e TEM images of D-PDPP4T-HD:[70]PCBM blends with various cosolvents. All images share the same scale bar of 200 nm. f J-V characteristics of D-PDPP4T-HD:[70]PCBM solar cells under simulated AM1.5 G (100 mW cm−2) illumination (solid lines). The dash lines indicate the dark current. g Corresponding EQE spectra
