Venla M. Manninen, Juha P. Heiskanen, Kimmo M. Kaunisto, Osmo E. O. Hormi and Helge J. Lemmetyinen
RSC Adv., 2014,4, 8846-8855
DOI:
10.1039/C3RA47367H,
Paper
In this paper, we report the spectroscopic properties of a synthetically tailored Alq3 end-capped oligothiophene ((Alq3)2-OT) studied by steady state and time resolved spectroscopic methods in chloroform and solid films. In chloroform a photo-induced intramolecular electron transfer from the oligothiophene backbone to the Alq3 moiety was observed. When (Alq3)2-OT was mixed with a fullerene derivative (PCBM) in chloroform, we demonstrate that (Alq3)2-OT donates an electron to PCBM. With that in mind, (Alq3)2-OT was applied as a dopant molecule to improve the efficiency of P3HT:PCBM bulk hetero junction (BHJ) solar cells.