Open AccessMolecular engineering of carbazole functionalized ruthenium dyes for efficient dye-sensitized solar cells
Author(s) -
Hong Minh Nguyen,
Đình Lãm Vũ,
Duc Nghia Nguyen
Publication year - 2011
Publication title -
advances in natural sciences nanoscience and nanotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.476
H-Index - 40
ISSN - 2043-6262
DOI - 10.1088/2043-6262/2/4/045009
Subject(s) - ruthenium , carbazole , dye sensitized solar cell , moiety , energy conversion efficiency , nanocrystalline material , materials science , photochemistry , chemistry , optoelectronics , nanotechnology , electrode , stereochemistry , organic chemistry , catalysis , electrolyte
A new ruthenium complex, coded HMP-12, incorporating an antenna ligand composed of the sequential connection of a conjugated segment and carbazole hole-transport moiety was synthesized. This dye exhibits a lower energy metal-to-ligand charge transfer (MLCT) band centered at 536 nm with a high molar absorption coefficient of 21.43×10 3 M −1 cm −1 . Nanocrystalline ZnO dye-sensitized solar cells employing HMP-12 show good conversion efficiency (4.46%). It was found that the difference in light-harvesting properties between Rut-B1, HMP-11 and HMP-12 is associated mainly with dye structure. The power conversion efficiency of solar cells based on HMP-11 is 4.11% while the Rut-B1 delivered a lower efficiency of 3.57% under the same device fabrication and measuring conditions.