Dye-Sensitized Nanocrystalline TiO2 Solar Cells Based on Ruthenium(II) Phenanthroline Complex Photosensitizers

作者：Kohjiro Hara, Hideki Sugihara, Yasuhiro Tachibana, Ashraful Islam, Masatoshi Yanagida, Kazuhiro Sayama, Hironori Arakawa, Gaku Fujihashi, Takaro Horiguchi, Tohru Kinoshita · 发表于：Langmuir · 年份：2001 · DOI：10.1021/la010343q · 被引用次数：178 · 研究领域：TiO2 Photocatalysis and Solar Cells、Polyoxometalates: Synthesis and Applications、Advanced Photocatalysis Techniques

We have synthesized four carboxylated Ru(II) phenanthroline complexes with different numbers of carboxyl groups, cis -bis(4,7-dicarboxy-1,10-phenanthroline)dithiocyanato ruthenium(II) (Ru(dcphen) 2 (NCS) 2 ), cis -bis(4-monocarboxy-1,10-phenanthroline)dithiocyanato ruthenium(II) (Ru(mcphen) 2 (NCS) 2 ), cis -(4,7-dicarboxy-1,10-phenanthroline)(1,10-phenanthroline)dithiocyanato ruthenium(II) (Ru(dcphen)(phen)(NCS) 2 ), and cis -(4-monocarboxy-1,10-phenanthroline)(1,10-phenanthroline)dithiocyanato ruthenium(II) (Ru(mcphen)(phen)(NCS) 2 ), as photosensitizers for oxide semiconductor solar cells. We have studied photovoltaic properties of dye-sensitized nanocrystalline semiconductor solar cells based on Ru phenanthroline complexes and an iodine redox electrolyte. The photovoltaic performance of the TiO 2 solar cell sensitized by Ru(dcphen) 2 (NCS) 2 (TBA) 2 exceeded that of ZnO, SnO 2, and In 2 O 3 solar cells. A solar energy to electricity conversion efficiency ( η ) of 6.6% was obtained under the standard AM 1.5 irradiation (100 mW cm - 2, JIS A class) with a short-circuit photocurrent density ( J sc ) of 12.5 mA cm - 2, an open-circuit photovoltage ( V oc ) of 0.74 V, and a fill factor (ff) of 0.71. Monochromatic incident photon to current conversion efficiency was 78% at 526 nm. Deoxycholic acid as a coadsorbate and decreasing film thickness improved V oc especially due to suppression of the dark current reaction corresponding to the reduction of triiodide ions with injected ...