Creation of novel light sensitive amorphous molecular materials and their photovoltaic properties

Novel light sensitive amorphous molecular materials, 4,4 ' ,4 -tris[4-methylphenyl(4-nitrophenyl)amino]triphenylamine (MNTDATA) and 4,4 ' ,4 -tris[5-(dimesitylboryl)thiophen-2-yl]triphenylamine (MB-TTPA), were designed and synthesized. pn-Heterojunction devices consisting of these materials as p-type organic semiconductors and anthra[2 ,1 ,9 :4,5,6:6 ,5 10 :4 ' ,5 ' ,6 ' ]diisoquino[2,1-a:2 ', 1 ' -a ' ]dibenzimidazole-10,21 -dione as an n-type material were found to respond to visible light of wavelengths from 400 to 800 nm, exhibiting conversion efficiencies of approximately 0.1% for white light irradiated through the ITO electrode.