Temperature and time dependence of heat treatment of RR-P3HT/PCBM solar cell

A detailed study of the postproduction heat treatment of organic solar cells based on regio-regular poly(3-hexylthiophene) (RR-P3HT) and [6,6]-phenyl-C61 butyric acid methyl ester (PCBM) is presented. The efficiency of the devices was significantly improved by postproduction heat treatment and both the optimal annealing temperature and optimal annealing time were determined. The phase separation of PCBM and RR-P3HT into bi-continuous network structure occurs within a very short period of time and is very stable.