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oe1(光电查) - 科学论文

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出版时间
  • 2018
研究主题
  • electropolymerization
  • polyporphyrin films
  • quartz crystal microbalance method
  • oxygen electroreduction.
应用领域
  • Applied Chemistry
机构单位
  • G.A. Krestov Institute of Solution Chemistry of RAS
  • University Union Nicola Tesla
  • Ivanovo State University of Chemistry and Technology
84 条数据
?? 中文（中国） ▾

  • An all small molecule organic solar cell based on a porphyrin donor and a non-fullerene acceptor with complementary and broad absorption

    摘要： A thieno[3,2-b]thiophene-functionalized porphyrin molecule (DEP-TT) with the ethynylene bridges between the diketopyrrolopyrrole and porphyrin units has been designed and synthesized as the donor material. DEP-TT exhibits a broad absorption wavelength in the visible region with the onset absorption to 898 nm of the film and a low optical band gap of 1.38 eV. IDT-C8, as the acceptor material has a relatively strong absorption spectrum ranging from 500-750 nm in the solid film, which exactly fills the absorption trough of DEP-TT. The power conversion efficiency (PCE) of all small molecule increased from 0.64% (Jsc = 2.61 mA cm-2, Voc = 0.82 V, and FF = 0.30) to 5.14% (Jsc = 11.15 mA cm-2, Voc = 0.71 V, and FF = 0.65) after solvent vapor annealing. The PCE of 5.14% provided valuable recommendation based on porphyrin all small molecule system, since few work has involved in this field.

    关键词： organic solar cells,all small molecule,complementary absorption,porphyrin

    更新于2025-09-16 10:30:52

  • Rational design of SM315-based porphyrin sensitizers for highly efficient dye-sensitized solar cells: A theoretical study

    摘要： To explore high-efficiency dye-sensitized solar cells (DSSCs), five D-π-A type porphyrin dyes derived from SM315 synthesized by Gr?tzel et al with electron-rich units D1-D5 as donors were investigated using density functional theory (DFT) and time-dependent density functional theory (TD-DFT). The enhanced light harvesting abilities of all designed dyes are reflected by widened light harvesting efficiency curves, extended absorption spectra to near-infrared region and ~84 nm red-shifted maximum absorption wavelengths as well as double increased oscillator strengths. Mainly contributed by the remarkable increment of predicted short-circuit current density, the predicted overall efficiency of the design dyes increases by ~27% compared to SM315. Especially, S101 could be the most promising candidate with the highest predicted overall efficiency of 16.7% among all of dyes. The dynamic simulations of interfacial electron transfer of all the investigated dyes expound that the excited electrons inject almost totally into semiconductor TiO2 within 200 fs. This work would provide guidance for exploring potential sensitizers in highly efficient DSSCs.

    关键词： porphyrin sensitizer,interfacial electron transfer,power-conversion efficiency,dye-sensitized solar cell

    更新于2025-09-12 10:27:22

  • Efficient near IR porphyrins containing a triphenylamine-substituted anthryl donating group for dye sensitized solar cells

    摘要： Three porphyrin dyes comprising 4-(10-ethynylanthracen-9-yl)-N,N-diphenylaniline as an extended p-conjugated donor integrated with systematically varied acceptor groups, i.e., 2-cyano-3-(5-methylthiophen-2-yl)acrylic acid (LG19), 2-cyano-3-(5-(7-methylbenzo[c][1,2,5] thiadiazol-4-yl) thiophen-2-yl)acrylic acid (LG20), and 2-cyano-3-(4-(7-methyl benzo[c][1,2,5] thiadiazol-4-yl) phenyl)acrylic acid (LG21), have been synthesized and implemented in dye sensitized solar cells (DSSCs). All these sensitizers were characterized by various spectroscopic and electrochemical techniques. The absorption maxima of LG20 significantly red-shifted to 707 nm, when compared to those of the LG19 and LG21 sensitizers. Optical, electrochemical and theoretical studies suggest that the lowest unoccupied molecular orbitals (LUMOs) of LG20 and LG21 are very close to the TiO2 conduction band, when compared to that of LG19. The IPCE values of LG20 and LG21 were found to be 81% at 486 nm and 83% at 482 nm, respectively, and the onset wavelengths were shifted up to 900–980 nm. With favourable red shifted absorption of the LG20 sensitizer, a high power conversion efficiency (PCE) of 10.0% has been observed for the fabricated DSSC, which was higher than those of the DSSCs fabricated from LG19 (PCE = 8.51%) and LG21 (PCE = 9.04%). Therefore, the effect of the extended p-conjugated donor, anchoring group, benzothiadiazole auxiliary acceptor and presence of dodecyloxy groups significantly contributed to enhancing the efficiency of the device using a liquid redox electrolyte. Finally, we have used intensity modulated photovoltage spectroscopy and nanosecond transient studies to explain the design and efficiency relationship of these sensitizers.

    关键词： benzothiadiazole,dye sensitized solar cells,extended p-conjugated donor,power conversion efficiency,porphyrin dyes

    更新于2025-09-12 10:27:22

  • Self-Assembled Naphthalimide Conjugated Porphyrins Nanomaterials with D-A Structure for PDT/PTT Synergistic Therapy

    摘要： Light-activated phototherapy, including photothermal and photodynamic therapy, has become a new way for spatiotemporal control and non-invasive treatment of cancer. In this study, two new organic porphyrin molecules (NI-Por and NI-ZnPor) with donor (D)-acceptor (A) structure were designed and synthesized. The donor-acceptor pairs facilitated the intermolecular electron transfer, resulting in the enhancement of near-infrared (NIR) absorbance and nonradiative heat generation. After self-assembling, the nanoparticles were formed with the size around 60 nm. Relative to that of organic molecules, the absorption of NI-Por NPs and NI-ZnPor NPs broadened and red-shifted to the near-infrared region. Moreover, the porphyrin-containing nanoparticles can generate heat and reactive oxygen species (ROS) simultaneously induced by a single laser (635 nm). The intracellular reactive oxygen species production of NI-Por NPs and NI-ZnPor NPs was confirmed using DCFH-DA as an indicator. Furthermore, the localization of NI-Por NP and NI-ZnPor NP in HeLa cells was verified by fluorescence confocal laser microscopy. The photocytoxicity of two nanoparticles against HeLa cells were evaluated through CCK-8 method. The IC50 of NI-Por NPs and NI-ZnPor NPs upon 635 nm laser irradiation was calculated to be 6.92 μg/mL and 5.86 μg/mL, respectively. Furthermore, the PDT/PTT synergistic effect of NPs under 635 nm laser was verified through different treatment groups in vitro. All these results demonstrated that the as-prepared porphyrin-based nanoparticles are promising nanoagents for PDT/PTT in clinic.

    关键词： PTT,PDT,Self-assembly,Porphyrin,Nanoparticles

    更新于2025-09-12 10:27:22

  • Supramolecular structures of terbium( <scp>iii</scp> ) porphyrin double-decker complexes on a single-walled carbon nanotube surface

    摘要： This work mainly reports the observation of novel supramolecular structures of TbIII-5,15-bisdodecylporphyrin (BDP, C12P) double-decker complexes on the surfaces of single-walled carbon nanotubes (SWNTs) performed by scanning tunneling microscopy under an ultra-high vacuum and low temperature, atomic force microscopy, scanning electron microscopy coupled with energy dispersive spectroscopy, and ultraviolet-visible spectroscopy. The molecules formed a well-ordered self-assembled helix-shaped array with regular periodicity on the tube surface. Additionally, some magnetic properties of the BDP-molecule as well as the resulting BDP-SWNT composites were investigated by superconducting quantum interference measurements. The molecule exhibits single-molecule magnetic (SMM) properties and the composite's magnetization increases almost linearly with decreasing temperature which is possibly due to the coupling between porphyrin molecules and SWNTs. Consequently, this may enable the development of more advanced spintronic devices based on porphyrin-nanocarbon composites.

    关键词： Scanning tunneling microscopy,Magnetic properties,Supramolecular structures,Single-walled carbon nanotube,Atomic force microscopy,Terbium(III) porphyrin

    更新于2025-09-11 14:15:04

  • Design and synthesis of benzimidazole phenol-porphyrin dyads for the study of bioinspired photoinduced proton-coupled electron transfer

    摘要： Benzimidazole phenol-porphyrin dyads have been synthesized to study proton-coupled electron transfer (PCET) reactions induced by photoexcitation. High-potential porphyrins have been chosen to model P680, the photoactive chlorophyll cluster of photosynthetic photosystem II (PSII). They have either two or three pentafluorophenyl groups at the meso positions to impart the high redox potential. The benzimidazole phenol (BIP) moiety models the Tyrz-His190 pair of PSII, which is a redox mediator that shuttles electrons from the water oxidation catalyst to P680?+. The dyads consisting of a porphyrin and an unsubstituted BIP are designed to study one-electron one-proton transfer (E1PT) processes upon excitation of the porphyrin. When the BIP moiety is substituted with proton-accepting groups such as imines, one-electron two-proton transfer (E2PT) processes are expected to take place upon oxidation of the phenol by the excited state of the porphyrin. The bis-pentafluorophenyl porphyrins linked to BIPs provide platforms for introducing a variety of electron-accepting moieties and/or anchoring groups to attach semiconductor nanoparticles to the macrocycle. The triads thus formed will serve to study the PCET process involving the BIPs when the oxidation of the phenol is achieved by the photochemically produced radical cation of the porphyrin.

    关键词： pentafluorophenyl porphyrin,benzimidazole derivatives,proton-coupled electron transfer (PCET),photosystem II

    更新于2025-09-11 14:15:04

  • Synthesis, characterization and modeling of self-assembled porphyrin nanorods

    摘要： Porphyrin nanorods were prepared by ion-association between free-base meso 5,10,15,20-tetrakis-(4-N-methylpyridinium)porphyrin cations and tetraphenylborate anions. The nanorods have variable lengths (up to a few micrometers long) and diameters (~50–500 nm). Their structure at the molecular level was elucidated by combining multinuclear solid state NMR spectroscopy, synchrotron X-ray powder diffraction and DFT calculations.

    关键词： DFT modeling,solid state NMR,NMR crystallography,nanorods,porphyrin,self-assembly

    更新于2025-09-11 14:15:04

  • Efficient Polymer Solar Cells Based on New Random Copolymers with Porphyrin‐Incorporated Side Chains

    摘要： Two new wide bandgap block copolymers (PL1 and PL2) with porphyrin-incorporated side chains are designed and used as electron donors for solution-processed bulk heterojunction polymer solar cells. The photophysical, electrochemical, and photovoltaic properties, charge transport mobility and film morphology of these two block copolymers are investigated. Detailed investigations reveal that the different alkyl groups and electron-withdrawing substituents on the porphyrin pendant units have significant influence on the polymer solubility, absorption energy level, band gap, and charge separation in the bulk-heterojunction thin films, and thus the overall photovoltaic performances. Organic photovoltaic devices derived from these copolymers and ([6,6]-phenyl-C71-butyric acid methyl ester) (PC71BM) acceptor show the best power conversion efficiencies of 5.83% and 7.14%, respectively. These results show that the inclusion of a certain proportion of side chain porphyrin group as a pendant in the traditional donor-acceptor (D-A) type polymer can broaden the molecular absorption range and become a full-color absorbing molecule. The size of the porphyrin pendant also has an obvious effect on the properties of the molecule.

    关键词： block copolymers,organic photovoltaics,polymer solar cells,bulk heterojunctions,porphyrin

    更新于2025-09-11 14:15:04

  • Structural modification as the pioneer strategy in competition of the porphyrin dye and perovskite solar cells: From dynamics to kinetics of the photovoltaic processes

    摘要： Molecular engineering plays a key role in designing ef?cient dye-sensitized/perovskite solar cells (DSSCs/PSCs). Porphyrins have more favorable spectroscopic properties than AZn(COOH)3 perovskites due to their lower chemical hardness. Also, porphyrins are pioneering photosensitizers in exciton formation/dissociation, kinetically. The presence of Zn2t and butadiyne as the linker in the porphyrins and the existence of the electron donors of dimethylammonium and formamidinium in the perovskites improve their photovoltaic properties. Porphyrin dimers have a greater charge transfer distance in comparison to the monomers. However, they show less energy conversion ef?ciency, which may be related to the quenching of the interporphyrin charge transfer. As a consequence, DSSCs based on the porphyrin monomers have a higher ef?ciency than the studied PSCs.

    关键词： perovskite solar cells,porphyrin dye,exciton formation/dissociation,molecular engineering,photovoltaic processes

    更新于2025-09-11 14:15:04

  • Significant Influence of a Single Atom Change in Auxiliary Acceptor on Photovoltaic Properties of Porphyrin-Based Dye-Sensitized Solar Cells

    摘要： The rational design of porphyrin sensitizers is always crucial for dye-sensitized solar cells (DSSCs), since the change of only a single atom can have a signi?cant in?uence on the photovoltaic performance. We incorporated the pyridothiadiazole group, as a stronger electron-withdrawing group, into the commonly well-established skeleton of D-porphyrin-triple bond-acceptor sensitizers by a single atom change for a well-known strong electron-withdrawing benzothiadiazole (BTD) unit as an auxiliary acceptor. The impact of the pyridothiadiazole group on the optical; electrochemical; and photovoltaic properties of D–π–A porphyrin sensitizers was investigated with comparison for a benzothiadiazole-substituted SGT-020 porphyrin. The pyridothiadiazole-substituted SGT-024 porphyrin dye was red-shifted so that the absorption range might be expected to achieve higher light harvest ef?ciency (LHE) than the SGT-020 porphyrin. However, all the devices were fabricated by utilizing SGT-020 and SGT-024, evaluated and found to achieve a cell ef?ciency of 10.3% for SGT-020-based DSSC but 4.2% for SGT-024-based DSSC under standard global AM 1.5G solar light conditions. The main reason is the lower charge collection ef?ciency of SGT-024-based DSSC than SGT-020-based DSSC, which can be attributed to the tilted dye adsorption mode on the TiO2 photoanode. This may allow for faster charge recombination, which eventually leads to lower Jsc, Voc and power conversion ef?ciency (PCE).

    关键词： charge collection ef?ciency,dye-sensitized solar cells,D–π–A structural porphyrin,acceptor units,charge recombination

    更新于2025-09-11 14:15:04