title: A new class of cyclometalated ruthenium sensitizers of the type ĈNN for efficient dye-sensitized solar cells.
abstract: A new class of cyclometalated ruthenium sensitizers incorporating a ĈNN ligand and conjugated 2,2'-bipyridine in the ancillary ligand have been designed and synthesized. The photovoltaic performance of JK-206 using an electrolyte containing 0.6 M 1,2-dimethyl-3-propylimidazolium iodide, 0.05 M I(2), 0.1 M LiI, and 0.5 M tert-butylpyridine in CH(3)CN gave a short-circuit photocurrent density of 19.63 mA cm(-2), an open-circuit voltage of 0.74 V, and a fill factor of 0.72, affording an overall conversion efficiency of 10.39%. The efficiency is the highest one reported for dye-sensitized solar cells based on the cyclometalated ruthenium sensitizer of the type ĈNN. Moreover, the same device using a polymer gel electrolyte exhibited a remarkable stability under 1000 h of light soaking at 60 °C, retaining 91% of the initial efficiency of 7.14%.
authors: Department of New Material Chemistry, Korea University, Jochiwon, Chungnam 339-700, Korea.
authors: Jeum-Jong
authors: JJ
authors: Kim
authors: Hyunbong
authors: H
authors: Choi
authors: Sanghyun
authors: S
authors: Paek
authors: Chulwoo
authors: C
authors: Kim
authors: Kimin
authors: K
authors: Lim
authors: Myung-Jong
authors: MJ
authors: Ju
authors: Hong Seok
authors: HS
authors: Kang
authors: Moon-Sung
authors: MS
authors: Kang
authors: Jaejung
authors: J
authors: Ko