Novel organic sensitizers comprising donor, electron-conducting, and anchoring groups were engineered at molecular level synthesized. The functionalized unsymmetrical 3-{5-[N,N-bis(9,9-dimethylfluorene-2-yl)phenyl]-thiophene-2-yl}-2-cyano-acrylic acid (JK-1) 3-{5'-[N,N-bis(9,9-dimethylfluorene-2-yl)phenyl]-2,2'-bisthiophene-5-yl}-2-cyano-acrylic (JK-2), upon onto TiO2 film, exhibit unprecedented incident photon to current conversion efficiency of 91%. photovoltaic data using an electrolyte...

A [Ru(dcbpy)(2)(NCS)(2)] dye has been chemically modified by the addition of a secondary electron donor moiety, N,N-(di-p-anisylamino)phenoxymethyl. Optical excitation adsorbed to nanocrystalline TiO(2) films shows remarkably long-lived charge-separated state, with decay half time 0.7 s. Semiempirical calculations confirm that HOMO molecule is localised on group. The retardation recombination dynamics relative unmodified control caused increase in spatial separation orbital from surface....

Highly phosphorescent blue-light-emitting anionic iridium complexes (C4H9)4N[Ir(2-phenylpyridine)2(CN)2] (1), (C4H9)4N[Ir(2-phenyl-4-dimethylaminopyridine)2(CN)2] (2), (C4H9)4N[Ir(2-(2,4-difluorophenyl)-pyridine)2(CN)2] (3), (C4H9)4N[Ir(2-(2,4-difluorophenyl)-4-dimethylaminopyridine)2(CN)2] (4), and (C4H9)4N[Ir(2-(3,5-difluorophenyl)-4-dimethylaminopyridine)2(CN)2] (5) were synthesized characterized using NMR, UV-vis absorption, emission spectroscopy electrochemical methods. In these color...

A novel ligand 4,4'-bis(carboxyvinyl)-2,2'-bipyridine (L) and its ruthenium(II) complex [Ru(II)L(2)(NCS)(2)] (K8) were synthesized characterized by analytical, spectroscopic, electrochemical techniques. The performance of the K8 as a charge transfer photosensitizer in nanocrystalline TiO(2) based solar cells was studied. When anchored onto film, we achieved very efficient sensitization yielding 77 +/-5% incident photon-to-current efficiencies (IPCE) visible region using an electrolyte...

The development of metal-free organic sensitizers is a key issue in dye-sensitized solar cell research. We report successful photovoltaic conversion with new class stable tetrathiafulvalene derivatives, showing surprising electrochemical and kinetic properties. With time-resolved spectroscopy we could observe highly efficient regeneration the photo-oxidized sensitizers, which were attached to mesoporous TiO2 film, by redox mediator pores (iodide/tri-iodide), even though measured driving...

Bridge the gap: Rigid π-conjugated bridges such as ethynyl spacers, are effective for connecting phthalocyanine π system to conduction band of TiO2. A series zinc photosensitizers with carboxyethynyl anchoring groups have been synthesized. Solar cells sensitized pictured compound exhibit record efficiencies 5.5 % and 6.1 under 100 (1 sun irradiation) 9.5 mW cm−2, respectively. Detailed facts importance specialist readers published "Supporting Information". Such documents peer-reviewed, but...

Abstract The colorimetric, fluorimetric, and electrochemical detection of mercury ions by functionalized ruthenium sensitizers in aqueous non‐aqueous solutions on anchored TiO 2 films are investigated. Mercury coordinate reversibly to the sensitizers, inducing a color change increasing phosphorescence intensity significantly. data adsorbed sensitizer show reversible couple, owing percolation through electronic couplings between –NCS ligands neighboring molecules; upon exposure Hg 2+...

A ruthenium complex trans-[Ru(L)(NCS)2], L = 4,4' ''-di-tert-butyl-4',4' '-bis(carboxylic acid)-2,2':6',2' ':6' ',2' ''-quaterpyridine (N886), was synthesized and characterized by spectroscopic electrochemical methods. The absorption spectrum of the N886 shows metal-to-ligand charge-transfer transitions in entire visible region quasi-reversible oxidation reduction potentials at E1/2 +0.38 −1.92 V vs ferrocene, respectively. electronic spectra were calculated density functional theory...

Herein we report a series of charged iridium complexes emitting from near-UV to red using carbene-based N^C: ancillary ligands. Synthesis, photophysical and electrochemical properties this are described in detail together with X-ray crystal structures. Density Functional Theory calculations show that the emission originates cyclometallated main ligand, contrast commonly designed bidentate N^N ligands, where ligand. The radiative process compounds is characterized by relatively low...

Amphiphilic ligands 4,4'-bis(1-adamantyl-aminocarbonyl)-2,2'-bipyridine (L(1)), 4,4'-bis[5-[N-[2-(3beta-cholest-5-en-3-ylcarbamate-N-yl)ethyl]aminocarbonyl]]-2,2'-bipyridine (L(2)), 4,4'-bis[5-[N-[2-(3beta-cholest-5-en-3-ylcarbamate-N-yl)propyl]aminocarbonyl]]-2,2'-bipyridine (L(3)), and 4,4'-bis(dodecan-12-ol)-2,2'-bipyridine (L(4)) their heteroleptic ruthenium(II) complexes of the type [Ru(II)LL(1)(NCS)(2)] (5), [Ru(II)LL(2)(NCS)(2)] (6), [Ru(II)LL(3)(NCS)(2)] (7), [Ru(II)LL(4)(NCS)(2)]...

A symmetric squaraine and its related non-symmetric structure are shown to have comparable efficiencies in DSCs, but with undoubtedly advantages the low cost easiness of synthesis for symmetrical structure.

Novel donor-π-acceptor (D-π-A) dyes, coded as SD-1, SD-2 and SD-5, were designed synthesized for dye-sensitized solar cells. All these dyes comprised the same donor acceptor units while oligo thiophene introduced linkers between units. The photophysical electrochemical properties of investigated by UV/vis spectrometry cyclic voltammetry. subsequently tested sensitizers in Photovoltaic performance device with dye showed maximum monochromatic incident photon-to-current efficiency (IPCE) 82% an...

Four D-π-A sensitizers comprising a thienyl-diketopyrrolopyrrole (ThDPP) bridge were synthesized and tested in iodide/triiodide liquid electrolyte DSC devices. The dye series was strategically designed to develop structure–property relationship. best performing sensitizer utilized phenyl-based anchor triphenylamine donor (η = 5.03%).

The behavior toward oxygen sensing of nanocomposites made the aluminum oxide-hydroxide nanostructured solid support (AP200/19) and neutral blue emitting cyclometalated iridium(III) complexes was studied. results are compared with same dyes immobilized in polystyrene films. Since photoluminescence is totally quenched for concentrations just over 10%, these systems using region visible spectrum promising detection at low concentration. In particular, supported into AP200/19 provide best...

Two novel symmetrical blue squaraine sensitizers were synthesized, which exhibit panchromatic light harvesting and a record efficiency over 6% with Jsc exceeding 14 mA cm(-2), Voc 620 mV under 1 sun. Their color, low cost, easiness of synthesis, relatively high photo- thermal stability open up the way for commercial applications.

A cyclic tetranuclear cyclometallated iridium(III) complex using cyanide anions as bridging ligands and displaying a tetrahedrally distorted square geometry has been obtained with high yield; photo- electrochemical characterizations show that most interesting properties of mononuclear iridium complexes are retained in the assembly.

We synthesized the Cu(II) and Zn(II) complexes of 2,7,12,17-tetrapropionic acid 3,8,13,18-tetramethyl-21H,23H porphyrin (coproporphyrin-I) successfully employed them as sensitizers in dye-sensitized solar cells. Copper(II) coproporphyrin-I exhibits a power conversion efficiency 3.8% measured under irradiation AM 1.5G full sunlight (100 mW cm−2).

The recently reported heteroleptic cyclometallated iridium(III) complex [Ir(2-phenylpyridine)2(2-carboxy-4-dimethylaminopyridine)] N984 and its isomer N984b have been studied more in detail. While photo- electrochemical properties are very similar, DFT/TDDFT calculations show that the two isomers different HOMO orbital characteristics. As a consequence, solution processed OLEDs made using mixture of similar to vacuum devices has dramatic detrimental effect on performances device. In...

Starre π-konjugierte Brücken wie die Ethinylgruppe sind geeignet, um das π-System eines Phthalocyanins effektiv an Leitungsband von TiO2 zu koppeln. Eine Reihe Zinkphthalocyanin-Photosensibilisatoren mit Carboxyethinyl-Ankergruppen wurde synthetisiert. Solarzellen, der gezeigten Verbindung sensibilisiert wurden, zeigten Wirkungsgrade 5.5 % und 6.1 unter 100 (1 sun) bzw. 9.5 mW cm−2.

Abstract We report a facile synthetic route to obtain functionalized quaterpyridine ligand and its trans ‐dithiocyanato ruthenium complex, based on microwave‐assisted procedure. The complex has been purified using silica chromatographic column by protecting carboxylic acid groups as iso ‐butyl ester, which are subsequently hydrolyzed. highly pure exhibits panchromatic response throughout the visible region. DFT/time‐dependent DFT calculations have performed in solution adsorbed onto TiO 2...