Abstract:

Based on molecular design, starburst europium(Ⅲ) β-diketonate complex tris(dibenzoylmethanato){1,3,5tris［2(2′pyridyl)benzimidazoly］methylbenzene}europium(Ⅲ) (Eu₃(DBM)₉(TMMB)) was synthesized. An organic photovoltaic (PV) device, in which 4,4′,4″tris［3-methylphenyl(phenyl)amino］triphenylamine (m-MTDATA) and Eu₃(DBM)₉(TMMB) are used as an electron donor and an acceptor, respectively, has been fabricated by a vacuum deposition method. Under the illumination of UV light (365 nm, 1.6 mW/cm2 ) , the open circuit voltage, short circuit current dencity, fill factor and power conversion efficiency of the PV device were measured to be 1.70 V, 38.9 μA/cm2, 0.25 and 1.05%, respectively. These results indicate that the starburst europium(Ⅲ) β-diketonate complex showed  good PV performance.

Key words: starburst, β-diketonate complex, organic photovoltaic device, synthesis, Eu₃(DBM)₉(TMMB)