A Metallocene Molecular Complex as Visible-Light Absorber for High-Voltage Organic-Inorganic Hybrid Photovoltaic Cells

作者：Ishii Ayumi; Miyasaka Tsutomu^*

来源：ChemPhysChem, 2014, 15(6): 1028-1032.

DOI：10.1002/cphc.201301228

• absorber
• dye-sensitized solar cells
• electrochemistry
• hybrid photovoltaics
• metallocene

A thin solid-state dye-sensitized photovoltaic cell is fabricated by composing organic and inorganic heterojunctions in which the visible-light sensitizers are cyclopentadiene derivatives (Cp*) coordinated to a metal oxide, typically TiO2. The coordination bonds of the metallocene molecular complex (Ti-Cp*) create a new LMCT (ligand-to-metal charge transfer) absorption band and induce a rectified charge transfer from the organic ligands to TiO2, leading to photocurrent generation. Photovoltaic junctions are completed by coating crystalline organic molecules (perylene) as a hole-transport layer on the Cp*-coordinated TiO2 surface by using the vapor deposition method. The molecular plane of Cp* on the TiO2 surfaces seems to help the hole-transport layer to form ordered structures, which effectively improve carrier conductivities and minimize interfacial resistance. The organic-inorganic hybrid thin-film photocell with metallocene molecular complexes is capable of generating high open-circuit voltages exceeding 1.2 V.

• 出版日期2014-4-14