densities of polymer solar cellswz

Grazing-incidence X-ray diffraction and rocking scans have quantified the structure of poly(3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester in the active layers of organic solar cells. Our study reveals that the device JSC correlates with the local structural development of pure PCBM and, to second order, the extent of out-of-plane P3HT p-stacking. It is well documented that the processing conditions of organic solar cells comprising poly(3-hexylthiophene), P3HT, can have strong influences on device performance.1–5 For example, thermal or solvent-vapor annealing of the active layer has led to increases in the short-circuit current densities (JSC) of P3HT/[6,6]-phenyl-C61-butyric acid methyl ester, or PCBM, solar cells; this improvement in device performance has been attributed to enhancements of the polymer crystallinity.6–