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Efficient Sensitization of Nanocrystalline TiO 2 Films by a Near‐IR‐Absorbing Unsymmetrical Zinc Phthalocyanine
Author(s) -
Reddy Paidi Yella,
Giribabu Lingamallu,
Lyness Christopher,
Snaith Henry J.,
Vijaykumar Challuri,
Chandrasekharam Malapaka,
Lakshmikantam Mannepalli,
Yum JunHo,
Kalyanasundaram Kuppuswamy,
Grätzel Michael,
Nazeeruddin Mohammad K.
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200603098
Subject(s) - nanocrystalline material , phthalocyanine , zinc , sensitization , materials science , zinc compounds , chemical engineering , photochemistry , nanotechnology , chemistry , metallurgy , medicine , engineering , immunology
Pushing and pulling by three tert ‐butyl and two carboxylic acid groups, respectively, results in a sensitizer (see picture) that exhibits an incident photon‐to‐current conversion efficiency of 75 %. A cell sensitized with this compound gives a short‐circuit photocurrent density of (6.50±0.20) mA cm −2 , an open‐circuit voltage of (635±30) mV, and a fill factor of 0.74±0.03, which corresponds to an overall conversion efficiency of 3.05 %.