Recently, dye-sensitized solar cells have attracted much attention relevant to global environmental issues. Thus far, ruthenium(II) bipyridyl complexes proven be the most efficient TiO(2) sensitizers in cells. However, a gradual increment highest power conversion efficiency has been recognized past decade. More importantly, considering that ruthenium is rare metal, novel dyes without metal or using inexpensive are desirable for highly Large pi-aromatic molecules, such as porphyrins,...

Solar energy conversion is one of the most important issues for creating and maintaining a future sustainable society. In this regard, photovoltaic technologies have attracted much attention because their potential to solve environmental issues. particular, thin-film solar cells, such as organic photovoltaics (OPVs) perovskite cells (PSCs), are highly promising owing flexibility, light weight, low-cost production. One factors used evaluate solar-cell performance power efficiency (PCE), which...

Novel perylene imide derivatives with both electron-donating and bulky substituents have been synthesized for dye-sensitized solar cells. The power conversion efficiency reached 2.6%, which is the highest value among perylene-sensitized TiO2

This review article deals with recent advancements on the application of carbon nanotubes, especially single-walled nanotubes (SWNTs), to a photoactive layer electrodes photoelectrochemical devices and cells using liquid electrolytes. Versatile methodologies such as electrophoretic deposition, layer-by-layer self-assembled monolayer technique, spray-coating have been adopted form films SWNTs semiconducting or metallic electrodes. In cells, can act an efficient charge-transport pathway...

Large π-conjugated compounds are promising building blocks for organic thin-film electronics such as light-emitting diodes, field-effect transistors, and photovoltaics. Utilization of porphyrins phthalocyanines this purpose is highly fascinating because their excellent electric, photophysical, electrochemical properties well intense self-assembling abilities arising from π-π stacking interactions. This paper focuses on fundamental aspects self-assembled structures that have been obtained...

A novel naphthyl-fused zinc porphyrin carboxylic acid has been synthesized and employed successfully in a dye-sensitized TiO2 solar cell, with power conversion efficiency of 4.1%, which is improved by 50% relative to the unfused reference cell.

Semiconducting and metallic single-walled carbon nanotubes (s-SWNTs m-SWNTs) were enriched by agarose gel chromatography their photothermal photodynamic effects compared in H2O. Under near-infrared laser irradiation, s-SWNTs generated reactive oxygen species (ROS) more than m-SWNTs, whereas m-SWNTs produced heat efficiently s-SWNTs. More importantly, cancer cell killing PDE of has been disclosed for the first time.

A novel strategy for constructing a vertical arrangement of bicontinuous donor-acceptor arrays on semiconducting electrode has been developed. The relationship between the film structure and photoelectrochemical properties elucidated as function number donor layers first time. maximum incident photon-to-current efficiency value (21%) is comparable to highest (20%) reported arrangements electrodes.

5,10,15,20-Tetrakis(2,4,6-trimethylphenyl)-6'-carboxyquinoxalino[2,3-β]porphyrinatozinc (II) (ZnQMA) and 5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-6',7'-dicarboxyquinoxalino[2,3-β]porphyrinatozinc (ZnQDA) have been synthesized to evaluate the effects of β,β'-carboxyquinoxalino moieties on structure optical, electrochemical, photovoltaic properties porphyrins. Both ZnQMA ZnQDA exhibited broadened red-shifted light absorption in UV−visible spectra compared with...

Novel unsymmetrically π-elongated porphyrins, in which the naphthyl moiety is fused to porphyrin core at bridge with a carboxyl group (fused-Zn-1) or opposite side of phenyl (fused-Zn-2), have been synthesized improve light-harvesting abilities porphyrin-sensitized solar cells. As results π-elongation low symmetry, Soret and Q bands fused-Zn-1 fused-Zn-2 were red-shifted broadened, intensity Q-band relative that band was enhanced. The fused-Zn-2-sensitized TiO2 cells showed power conversion...

We have prepared meso-bis(diarylamino)-substituted porphyrins (cis-ZnP and trans-ZnP), meso-diarylamino-substituted porphyrin (mono-ZnP), reference without the meso-diarylamino group (ZnP) to evaluate effects of substituent number position diarylamino groups on optical, electrochemical, photovoltaic properties for first time. With increasing groups, light-harvesting were improved in visible region. The optical electrochemical HOMO−LUMO gaps parallel those estimated by DFT calculations....

A series of meso-tetraphenylzincporphyrins have been prepared to examine the effects porphyrin substituents and adsorption conditions on photovoltaic properties porphyrin-sensitized TiO2 cells. The cell performance strongly depended linking bridge between core surface, bulkiness around core, immersing solvents times for adsorption. In particular, high cells was achieved when protic solvent (i.e., methanol) short time (0.5−1 h) were used dye TiO2, which is in sharp contrast with Ru...

A bottom-up strategy has been developed to construct a multiple electron transfer system composed of organic/inorganic ternary composites (porphyrin, zinc oxide nanoparticles, reduced graphene oxide) on semiconducting electrode without impairing the respective donor–acceptor components. The hierarchical cascade exhibited remarkably high photocurrent generation with an incident-photon-to-current efficiency up ca. 70%.

Liquid crystalline donor (i.e., phthalocyanine) was covalently linked to acceptor (i.e, fullerene) achieve efficient charge-transport properties in a liquid phase. The columnar structure exhibited highly ambipolar character, demonstrating the potential utility of strategy organic electronics.

Zero-, one-, and two-dimensional nanostructured carbon allotropes, i.e., fullerenes, single-walled nanotubes (SWNTs), graphenes, in combination with electron-donating conjugated molecules are promising building blocks for artificial photosynthesis solar energy conversion. This feature article focuses on the fundamental aspects of covalently linked composites porphyrins SWNTs, graphenes. The linkage structures between porphyrin nanocarbons have been found to exert a substantial impact their...

Novel 5-(5-carboxy-2-thienyl)-10,15,20-tris(2,4,6-trimethylphenyl)-porphyrinatozinc(II) (Zn5S), 5-(5-carboxy-2-furyl)-10,15,20-tris(2,4,6-trimethylphenyl)porphyrinatozinc(II) (Zn5O), and 5-(4-carboxy-2-thienyl)-10,15,20-tris(2,4,6-trimethylphenyl)porphyrinatozinc(II) (Zn4S) were synthesized to evaluate the spacer effects on structures of porphyrin films photovoltaic properties porphyrin-sensitized TiO2 solar cells. Each porphyrins showed different adsorption behavior saturated coverage...

Conjugated polymers with alternating main chain structures of zinc porphyrin−furan (PZnPF) and porphyrin−thiophene (PZnPT) have been synthesized by palladium(0)-catalyzed Stille coupling reaction. The optical, electrochemical, photophysical, photovoltaic properties PZnPF PZnPT were investigated to elucidate the effects heterole bridges (i.e., furan vs. thiophene) in porphyrin polymers. optical bandgap (1.75 eV) is smaller than that (1.90 eV), implying high delocalization π-electrons along...

Electrode structures and photovoltaic properties of porphyrin-sensitized solar cells with TiO2 Nb-, Ge-, Zr-added composite electrodes were examined to disclose the effects partial substitution Ti atom by other metals in electrodes. The prepared sol-gel process using laurylamine hydrochloride as a template for formation micellar precursors yielding well-defined mesoporous nanocrystalline structures, cases silica titania tubules nanoparticles templating mechanism. characterized transmission...

Phthalocyanines with high peripheral substitutions and free from potential contamination by regioisomers have been synthesized evaluated as photosensitizers for dye-sensitized solar cell applications. Each of the sterically hindered precursor compounds was accomplished Suzuki-Miyaura cross-coupling reactions arylchloride corresponding boronic acids. Metal phthalocyanine-sensitized cells showed no photocurrent generation due to its low excited singlet state (LUMO) compared conduction band...

Novel benzo[f]quinoxalino[2,3-β]porphyrin carboxylic acid (ZnBQA) and cyanoquinoxalino[6,7-β]porphyrin (ZnQCA) have been synthesized to evaluate the effects of π-elongation fused position quinoxaline-fused porphyrins on optical, electrochemical, photovoltaic properties. ZnBQA showed a split, red-shifted Soret band relative that quinoxalino[2,3-β]porphyrin (ZnQMA), while Q bands are rather blue-shifted. On other hand, both Q-bands ZnQCA compared those ZnQMA. The optical HOMO−LUMO gaps...

Donor−acceptor molecules have been fabricated on a nanostructured semiconducting electrode for solar energy conversion (i.e., dye-sensitized bulk heterojunction cell). The device structure is similar to that of cells, but the top surface covered with donor−acceptor multilayers. Thus, initial charge separation takes place at blend interface donor−acceptor, which typical characteristic whereas subsequent processes resemble those in cells. In this novel cell, donor-nanocarbons fullerenes and...

We have prepared a novel push–pull porphyrin with an electron-donating diarylamino group at the meso-position and electron-withdrawing 4-carboxy-2,3,5,6-tetrafluorophenylethynyl anchoring opposite to address substitution effects of fluorine atoms on photovoltaic properties for first time. The fluoro-substituted showed slightly improved light-harvesting when compared reference in solution, due enhancement charge-transfer character. porphyrin-sensitized TiO2 cell exhibited moderate power...

Research of CH3NH3PbI3 perovskite solar cells had significant attention as the candidate new future energy. Due to toxicity, however, lead (Pb) free photon harvesting layer should be discovered replace present perovskite. In place lead, we have tried antimony (Sb) and bismuth (Bi) with organic metal monovalent cations (CH3NH3 +, Ag+ Cu+). Therefore, in this work, lead-free photo-absorber layers (CH3NH3)3Bi2I9, (CH3NH3)3Sb2I9, (CH3NH3)3SbBiI9, Ag3BiI6, Ag3BiI3(SCN)3 Cu3BiI6 were processed by...