Journal ArticleDOI
An Iron‐Based Photosensitizer with Extended Excited‐State Lifetime: Photophysical and Photovoltaic Properties
Thibaut Duchanois,Thibaut Duchanois,Thibaud Etienne,Thibaud Etienne,Thibaud Etienne,Cristina Cebrián,Cristina Cebrián,Li Liu,Antonio Monari,Antonio Monari,Marc Beley,Marc Beley,Xavier Assfeld,Xavier Assfeld,Stefan Haacke,Philippe C. Gros,Philippe C. Gros +16 more
TLDR
In this article, a homoleptic iron complex bearing tridentate bis-carbene (CNC) ligands was designed for sensitization of TiO2 photoanodes.Abstract:
Herein, we report a homoleptic iron complex bearing tridentate bis-carbene (CNC) ligands designed for sensitization of TiO2 photoanodes. Its excited state has been characterized by ultra-fast transient spectroscopy and time-dependent density functional theory (TD-DFT) computations, which reveal a record triplet metal-to-ligand charge-transfer ((MLCT)-M-3) excited-state lifetime (16 ps). The new dye was efficiently chemisorbed on TiO2 and promoted electron injection and photocurrent generation in a dye-sensitized solar cell upon solar irradiation.read more
Citations
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Journal ArticleDOI
Photoactive Complexes with Earth-Abundant Metals
TL;DR: The focus is on conceptually new, structurally well-characterized complexes with excited-state lifetimes between 10 ps and 1 ms in fluid solution for possible applications in photosensitizing, light-harvesting, luminescence and catalysis.
Journal ArticleDOI
A low-spin Fe( iii ) complex with 100-ps ligand-to-metal charge transfer photoluminescence
Pavel Chábera,Yizhu Liu,Om Prakash,Erling Thyrhaug,Amal El Nahhas,Alireza Honarfar,Sofia Essén,Lisa A. Fredin,Tobias Harlang,Tobias Harlang,Kasper S. Kjær,Kasper S. Kjær,Karsten Handrup,Fredric Ericson,H. Tatsuno,Kelsey M. Morgan,Joachim Schnadt,Lennart Häggström,Tore Ericsson,Adam Sobkowiak,Sven Lidin,Ping Huang,Stenbjörn Styring,Jens Uhlig,Jesper Bendix,Reiner Lomoth,Villy Sundström,Petter Persson,Kenneth Wärnmark +28 more
TL;DR: The absence of intersystem crossing enables the observation of spin-allowed emission directly to the ground state and could be exploited as an increased driving force in photochemical reactions on surfaces.
Journal ArticleDOI
Ultrafast Electron Dynamics in Solar Energy Conversion
TL;DR: The light-induced electron processes underlying the function of several molecular and hybrid materials currently under development for solar energy applications in dye or quantum dot-sensitized solar cells, polymer-fullerene polymer solar cells," organometal halide perovskite solar cells", and finally some photocatalytic systems are discussed.
Journal ArticleDOI
Luminescence and reactivity of a charge-transfer excited iron complex with nanosecond lifetime.
Kasper S. Kjær,Nidhi Kaul,Om Prakash,Pavel Chábera,Nils W. Rosemann,Alireza Honarfar,Olga Gordivska,Lisa A. Fredin,Karl-Erik Bergquist,Lennart Häggström,Tore Ericsson,Linnea Lindh,Arkady Yartsev,Stenbjörn Styring,Ping Huang,Jens Uhlig,Jesper Bendix,Daniel Strand,Villy Sundström,Petter Persson,Reiner Lomoth,Kenneth Wärnmark +21 more
TL;DR: It is shown that octahedral coordination of iron(III) by two mono-anionic facial tris-carbene ligands can markedly suppress such deactivation through low-lying metal-centered states, extending iron’s photoactivity to a nanosecond time frame.
Journal ArticleDOI
Iron sensitizer converts light to electrons with 92% yield
Tobias Harlang,Yizhu Liu,Olga Gordivska,Lisa A. Fredin,Carlito S. Ponseca,Ping Huang,Pavel Chábera,Kasper S. Kjær,Kasper S. Kjær,Helena Mateos,Jens Uhlig,Reiner Lomoth,Reine Wallenberg,Stenbjörn Styring,Petter Persson,Villy Sundström,Kenneth Wärnmark +16 more
TL;DR: This work describes the development of an iron-nitrogen-heterocyclic-carbene sensitizer with an excited-state lifetime that is nearly a thousand-fold longer than that of traditional iron polypyridyl complexes and opens up possibilities to develop solar energy-converting materials based on abundant elements.
References
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Journal ArticleDOI
A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
TL;DR: In this article, the authors describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency.
Journal ArticleDOI
Long-range corrected hybrid density functionals with damped atom–atom dispersion corrections
Jeng-Da Chai,Martin Head-Gordon +1 more
TL;DR: The re-optimization of a recently proposed long-range corrected hybrid density functional, omegaB97X-D, to include empirical atom-atom dispersion corrections yields satisfactory accuracy for thermochemistry, kinetics, and non-covalent interactions.
Journal Article
Long-Range Corrected Hybrid Density Functionals with Damped Atom-Atom Dispersion Corrections
TL;DR: Chai and Head-Gordon as discussed by the authors proposed a long-range corrected (LC) hybrid density functional with Damped Atom-Atom Dispersion corrections, which is called ωB97X-D.
Journal ArticleDOI
Conversion of light to electricity by cis-X2bis(2,2'-bipyridyl-4,4'-dicarboxylate)ruthenium(II) charge-transfer sensitizers (X = Cl-, Br-, I-, CN-, and SCN-) on nanocrystalline titanium dioxide electrodes
Mohammad Khaja Nazeeruddin,Andreas Kay,I. Rodicio,Robin Humphry-Baker,E. Mueller,Paul Liska,Nick Vlachopoulos,Michael Graetzel +7 more
TL;DR: Cis-X 2 Bis(2,2'-bipyridyl-4,4'-dicarboxylate)ruthenium(II) complexes were prepared and characterized with respct to their absorption, luminescence, and redox behavior.
Journal ArticleDOI
Solar energy conversion by dye-sensitized photovoltaic cells
TL;DR: Developing solar cells that are based on the sensitization of mesoscopic oxide films by dyes or quantum dots, and the examples for the first outdoor application of such solar cells will be provided.
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Femtosecond Excited-State Dynamics of an Iron(II) Polypyridyl Solar Cell Sensitizer Model
A low-spin Fe( iii ) complex with 100-ps ligand-to-metal charge transfer photoluminescence
Pavel Chábera,Yizhu Liu,Om Prakash,Erling Thyrhaug,Amal El Nahhas,Alireza Honarfar,Sofia Essén,Lisa A. Fredin,Tobias Harlang,Tobias Harlang,Kasper S. Kjær,Kasper S. Kjær,Karsten Handrup,Fredric Ericson,H. Tatsuno,Kelsey M. Morgan,Joachim Schnadt,Lennart Häggström,Tore Ericsson,Adam Sobkowiak,Sven Lidin,Ping Huang,Stenbjörn Styring,Jens Uhlig,Jesper Bendix,Reiner Lomoth,Villy Sundström,Petter Persson,Kenneth Wärnmark +28 more