Premium
Molecular Engineering of Zinc‐Porphyrin Sensitisers for p‐Type Dye‐Sensitised Solar Cells
Author(s) -
Lu Jianfeng,
Liu Zonghao,
Pai Narendra,
Jiang Liangcong,
Bach Udo,
Simonov Alexandr N.,
Cheng YiBing,
Spiccia Leone
Publication year - 2018
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201800104
Subject(s) - porphyrin , photochemistry , dye sensitized solar cell , fluorene , acceptor , zinc , materials science , conjugated system , electron acceptor , electrochemistry , energy conversion efficiency , chemistry , organic chemistry , electrode , polymer , optoelectronics , physics , electrolyte , condensed matter physics
Abstract Design of novel efficient light‐harvesters for p‐type dye‐sensitised solar cells (DSSCs) is indispensable for further advances in this photovoltaic technology. Herein, a novel D‐π‐A (D=donor, π=π‐conjugated linker, A=acceptor) sensitiser, ZnP1 , featuring an electron acceptor, perylenemonoimide (PMI), connected to an electron donor, di( p ‐carboxyphenyl)amine (DCPA), through fluorene and a zinc(II) porphyrin with alkyl chains as a π‐conjugated bridge is introduced. Spectroscopic and electrochemical characterisation of this dye along with a newly synthesised PMI‐free reference dye ZnP0 has been undertaken to demonstrate strong electron coupling between the DCPA donor and PMI acceptor subunits through the porphyrin ring in ZnP1 , which redshifts the light absorption onset to the near‐IR region. When integrated into p‐DSSCs based on a mesoporous nickel(II) oxide semiconductor electrode and a tris(acetylacetonato) iron(III/II) redox mediator, ZnP1 exhibits an onset of the incident photon‐to‐current conversion efficiency at 800 nm and a power conversion efficiency of up to 0.92 % under simulated 100 mW cm −2 AM 1.5 G irradiation. This is the highest efficiency of the porphyrin‐based p‐DSSCs hitherto reported.