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Cover Picture: An Improved Perylene Sensitizer for Solar Cell Applications (ChemSusChem 7/2008)
Author(s) -
Li Chen,
Yum JunHo,
Moon SooJin,
Herrmann Andreas,
Eickemeyer Felix,
Pschirer Neil G.,
Erk Peter,
Schöneboom Jan,
Müllen Klaus,
Grätzel Michael,
Nazeeruddin Mohammad K.
Publication year - 2008
Publication title -
chemsuschem
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.200890020
Subject(s) - perylene , photochemistry , solar cell , energy conversion efficiency , dye sensitized solar cell , electrolyte , chemistry , materials science , redox , optoelectronics , electrode , inorganic chemistry , organic chemistry , molecule
The cover picture shows the working principle of a dye‐sensitized solar cell based on a novel perylene organic sensitizer (dye), which exhibits two absorption bands at 620 and 462 nm and reversible oxidation and reduction potentials. The energetic alignment of the HOMO and LUMO of the dye is well suited for electron injection into the TiO 2 conduction band as well as for regeneration of the dye by either an electrolyte containing a redox system or a solid‐state hole conductor. In their Communication on page 615 ff., M. K. Nazeeruddin et al. report that a solar cell comprised of perylene‐anchored TiO 2 films and the iodine–iodide redox couple yields an unprecedented incident monochromatic photon‐to‐current conversion efficiency of 87%. The thiophenol donor groups provide directionality in the excited state leading to an improved short‐circuit current density, open‐circuit potential, and power conversion efficiency under standard AM 1.5 solar conditions.