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Zinc–Porphyrin Dyes with Different meso ‐Aryl Substituents for Dye‐Sensitized Solar Cells: Experimental and Theoretical Studies
Author(s) -
Sirithip Kanokkorn,
Prachumrak Narid,
Rattanawan Rattanawalee,
Keawin Tinnagon,
Sudyoadsuk Taweesak,
Namuangruk Supawadee,
Jungsuttiwong Siriporn,
Promarak Vinich
Publication year - 2015
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201402766
Subject(s) - carbazole , porphyrin , dye sensitized solar cell , moiety , photochemistry , conjugated system , zinc , aryl , energy conversion efficiency , chemistry , ring (chemistry) , open circuit voltage , materials science , polymer chemistry , organic chemistry , electrode , alkyl , voltage , physics , optoelectronics , quantum mechanics , electrolyte , polymer
A series of new zinc–porphyrin dyes that contain different meso substituents (phenyl, carbazole phenyl, and carbazole thiophenyl groups) and bithiophenyl cyanoacrylic acid as the π‐conjugated anchoring moiety were designed, synthesized, and characterized as sensitizers for dye‐sensitized solar cells (DSSCs). The effects of these meso substituents on the properties of the porphyrin dyes were theoretically and experimentally investigated. By meso substitution of the porphyrin ring with carbazole‐aryl moieties, the short‐circuit current ( J sc ) and open‐circuit voltage ( V oc ) of the DSSCs were improved as was the power conversion efficiency ( η ) owing to the influence of both the suppression of dye aggregations and the enhanced charge separation and charge‐injection efficiency of the dye to TiO 2 films. Among these dyes, ZnPCPA made of the carbazole phenyl meso substituents gave rise to the highest η of 6.24 % ( J sc =13.38 mA cm −2 , V oc =0.66 V, and fill factor of 0.71).