修车大队一品楼qm论坛51一品茶楼论坛,栖凤楼品茶全国楼凤app软件 ,栖凤阁全国论坛入口,广州百花丛bhc论坛杭州百花坊妃子阁

oe1(光电查) - 科学论文

过滤筛选

出版时间
  • 2019
研究主题
  • Dye-sensitized solar cell
  • Photoelectrode
  • Light scattering layer
  • Transmittance
  • White pigment (R902+)
  • Rutile titanium dioxide
应用领域
  • Optoelectronic Information Materials and Devices
机构单位
  • Tribhuvan University
352 条数据
?? 中文（中国） ▾

  • Synthesis of a novel MoIn2S4 alloy film as efficient electrocatalyst for dye-sensitized solar cell

    摘要： A petal-like MoIn2S4 thin film with excellent performance was synthesized on conductive fluorine-doped tin oxide (FTO) substrate through the hydrothermal method. The MoIn2S4 thin film with 0.169 g InCl3 exhibited the most excellent electrocatalytic activity and lowest charge transfer resistance of 19.90 Ω cm?1 among the various MoIn2S4 samples in I?/I3? redox couple, which was confirmed through a series of electrochemical investigations. The photoelectric conversion efficiency for the DSSC served the MoIn2S4 thin film as counter electrode achieved 6.51% under 100 mW·cm?2 illumination, which was a little better than that of the DSSC assembled with the Pt (6.39%) electrode. This research demonstrates that the petal-like MoIn2S4 counter electrode with simple preparation process, excellent electrocatalytic activity and efficient photoelectric conversion efficiency is a promising alternative to the conventional Pt electrode in DSSCs.

    关键词： MoIn2S4,Efficient conversion efficiency,Counter electrode,Dye-sensitized solar cell

    更新于2025-09-23 15:21:01

  • One-step hydrothermal synthesis of NiCo2S4 loaded on electrospun carbon nanofibers as an efficient counter electrode for dye-sensitized solar cells

    摘要： Possing excellent catalytic performance about counter electrode (CE) is the prerequisite for obtaining high performance dye sensitized solar cells (DSSCs). Herein, The NiCo2S4/carbon nanofibers (NiCo2S4/CNFs) are successfully synthetised via hydrothermal and electrospinning method, and then directly used in DSSCs. Owing to the synergistic effect between the catalytic of NiCo2S4 materials and the electrical conductivity of CNFs, All chemical measurements reveal that NiCo2S4/CNFs applied in DSSCs exhibit good power conversion efficiency (9.0%) and stability, which surpass that of DSSCs with Pt CE (7.48%), indicating that NiCo2S4/CNFs composite would be helpful for the low-cost and efficient application of DSSCs.

    关键词： Dye-sensitized solar cells,Electrospinning technology,Counter electrode,Transition metal sulfides

    更新于2025-09-23 15:21:01

  • Fabrication and performance analysis of a low cost, Pt free counter electrode using carbon coated ZnAl layered double hydroxide (C/ZnAl-LDH) for dye sensitized solar cells

    摘要： Carbon based material represents an e?ective substitute for Pt counter electrodes (CEs) in Dye Sensitized Solar Cells (DSSCs). This study introduces a novel carbon coated ZnAl layered double hydroxides (C/ZnAl-LDH) can be utilised as an e?ective CE in DSSCs. C/ZnAl-LDH was synthesised by the pyrolysis of ZnAl-LDH using glucose solution. The synthesised C/ZnAl-LDH was characterised using TEM, SEM, XRD and BET analysis. The surface roughness of both Pt and C/ZnAl-LDH ?lms were analysed using AFM spectroscopy. C/ZnAl-LDH slurry was pasted uniformly using doctor blade technique onto FTO glass substrate. The electrochemical measurements such as Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS) and Tafel polarization recommends that C/ZnAl-LDH can be used as a CE due to its good reduction rate of ?I3 comparable with Pt CEs. The photovoltaic parameters were observed to be 0.66 V and 11.97 mA/cm2 for open circuit voltage V(oc) and short circuit current density J(sc) respectively for C/ZnAl-LDH CE. The assembled cell with C/ZnAl LDH CE having power conversion e?ciency (PCE) of 3.18% is comparable to Pt CE having 4.62% which is measured under the similar testing conditions.

    关键词： Dye Sensitized Solar Cell,Carbon based material,Counter electrode,Layered double hydroxides,Electrochemical parameters

    更新于2025-09-23 15:21:01

  • Photocatalytic degradation enhancements of dyes with bi-functionalized zones of modified nanoflower like TiO2 with Pt-C3N4 under sunlight irradiation

    摘要： In this work, a novel method was proposed to photodegradation of organic dyes as important pollutants in wastewaters of textile industries. A one-step hydrothermal method was used to directly synthesis nanoflower like TiO2 on ordinary glass (OG) and modified with Pt-C3N4 nanotubes (NFs TiO2/Pt-C3N4) via electrophoretic deposition (EPD) method. Its photocatalytic activity investigated for degradation of three dyes under sunlight irradiation. The properties of NFs TiO2/Pt-C3N4 NTs were characterized by SEM, FT-IR, EDS, and XRD. Reduction of band gap energy and improvement of light absorption in the visible region for the modified photocatalyst were evaluated by using Tauc’s plot method. The experimental result showed that the NFs TiO2/Pt-C3N4 NTs achieved degradation efficiency of <97% at 240 min, towards methylene blue (MB), methyl violet (MV) and malachite green (MG) which are higher than pure TiO2 (68%, 83%, and 71%, respectively). Also as a new strategy, a part of the NFs TiO2/Pt-C3N4 NTs was used as a photoanode of the dye-sensitized solar cell (DSSC) and the other part, placed at a solution as a degradation zone. So with this bi-functionalized system, the degradation time was reduced from 240 min to 120 min with the same degradation efficiency.

    关键词： Nanoflowers of TiO2,Pt-C3N4 nanotubes,dye-sensitized solar cells,photodegradation,bi-functionalized system

    更新于2025-09-23 15:21:01

  • Photovoltaic Performance of Porphyrina??Based Dyea??Sensitized Solar Cells with Binary Ionic Liquid Electrolytes

    摘要： Here, we studied a green porphyrin sensitizer Y350 based dye-sensitized solar cells with binary ionic liquid based electrolytes, which are a mixture of 1-methyl-3-propyl-imidazolium iodide with 1-methyl-1-butylpyrrolidinium bis(trifluromethylsulfonyl)-imide, 1-butylpyridinium bis(trifluromethylsulfonyl)imide, 1-methyl-3-ethylimidazolium bis(trifluromethylsulfonyl)imide or 1-methyl-3-ethylimidazolium tetracyanoborate.The best semi-transparent green DSC device exhibited a short-circuit current density of 9.1 mA cm-2, an open-circuit voltage of 727 mV and a fill factor of 70%, corresponding to an overall power conversion efficiency (PCE) of 4.9 % under standard AM 1.5G illuminations at 100 mW cm-2. The PCE increased to 6.1 % with opaque films containing larger light scattering TiO2 particles.

    关键词： Dye-sensitized solar cell,Photovoltaics,Porphyrin dye,Organic dye,Ionic liquid electrolyte

    更新于2025-09-23 15:19:57

  • Morphological control of TiO2 nanocrystals by solvothermal synthesis for dye-sensitized solar cell applications

    摘要： TiO2 nanocrystals TETA1, TPRA2, TIPA3, TBUA4, TTBA5, and TBNA6 were prepared using ethanol, 1-propanol, isopropyl alcohol, n-butanol, tert-butyl alcohol, and benzyl alcohol, through the alcohol-based solvothermal method. The morphology, size, and crystallinity of the TiO2 nanocrystals were characterized utilizing transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and high-resolution transmission electron microscopy analyses. These six TiO2 nanocrystals with different morphologies were used as photoanodes in dye-sensitized solar cells (DSSCs) and their cell efficiencies were 8.08 % (TETA1), 8.38 % (TPRA2), 9.18 % (TIPA3), 7.68 % (TBUA4), 7.85 % (TTBA5), and 6.10 % (TBNA6). Among them, the well dispersed rod-shaped one-dimensional TiO2 (TIPA3) photoanode based cell showed the best power conversion efficiency due to its highest dye loading and excellent light-harvesting capacity. This TIPA3 cell demonstrated a fast electron transport rate with suppressed charge recombination which was confirmed from electrochemical impedance spectroscopy.

    关键词： dye loading,TiO2 nanocrystals,power conversion efficiency,solvothermal synthesis,dye-sensitized solar cells

    更新于2025-09-23 15:19:57

  • Photocurrent enhancement by incorporation of air-stable Cs <sub/>2</sub> SnI <sub/>6</sub> Perovskite in dye-sensitized solar cell

    摘要： Cs2SnI6 is an inorganic lead-free perovskite variant which is air and thermal stable and its application in the third generation of photovoltaic devices is undergoing rapid expansion over the past few years. This paper presents a fabrication of dye-sensitized solar cell (DSSC) with the incorporation of Cs2SnI6 perovskite in the active layer of N-719 dye. The absorbance spectra of N-719 dye on TiO2 mesoporous layer is found to increase by the addition of 2 wt% and 3 wt% of Cs2SnI6 in N719 dye in comparison to the reference of N-719 dye leading the role of Cs2SnI6 as photon absorber in the devices. Our fabricated DSSC device reveals a photocurrent enhancement from 6.36 mA/cm2 to 12.87 mA/cm2 by the addition of 3 wt% of Cs2SnI6, along with the enhancement of power conversion efficiency from 1.71% to 3.94%.

    关键词： Cs2SnI6,perovskite,dye-sensitized solar cell,N-719 dye,photocurrent enhancement

    更新于2025-09-23 15:19:57

  • A DFT study to probe homo-conjugated norbornylogous bridged spacers in dye-sensitized solar cells: an approach to suppressing agglomeration of dye molecules

    摘要： This work reports a sigma-bridged framework as spacers to design new dye-sensitized solar cells. The norbornylogous bridged spacer can avoid p–p aggregation of dye molecules on the semiconductor surface in DSSCs. These sesquinorbornatrienes are known to exhibit electron propagation through the interaction of sigma and p orbitals via through bond (OITB) and through space (OITS) mechanisms. Density functional theory (DFT) calculations performed with these spacers and a modelled simple donor unit like N,N-dimethylamine and cyanoacrylic acid as the anchoring group showed significant results with the requisite optical parameters for DSSCs. The newly designed dyes have shown comparable or better optical properties compared to the reference dye molecule with p-conjugated thiophene spacer units. The DGinjection, VOC and mnormal values calculated for the designed dyes were found to be higher than those of the reference system. The trans-sesquinorbornatriene system spacer (6-D) showed a VOC of 3.3 eV, DGinjection of 2.4 eV and oscillatory strength (f) of 0.96. The total and partial density of states indicates a good communication between the valence and conduction band for the designed dyes. Transition density matrix results suggest that the exciton dissociation in the excited state is sufficiently high to overcome the coulombic attraction of the hole. These results are promising for the design of dye molecules with such scaffolds, to achieve better efficiency and to eliminate one of the major issues with p-spacer units in DSSCs.

    关键词： homo-conjugated norbornylogous bridged spacers,dye molecules,DFT study,dye-sensitized solar cells,suppressing agglomeration

    更新于2025-09-23 15:19:57

  • How Reproducible are Electrochemical Impedance Spectroscopic Data for Dye-Sensitized Solar Cells?

    摘要： Dye-sensitized solar cell (DSC) technology has been broadly investigated over the past few decades. The sandwich-type structure of the DSC makes the manufacturing undemanding under laboratory conditions but results in the need for reproducible measurements for acceptable DSC characterization. Electrochemical impedance spectroscopy (EIS) offers the possibility to study complex electronic systems and is commonly used for solar cells. There is a tendency in the literature to present impedance data only for one representative device. At the same time, as current density–voltage plots illustrate, measurements can vary within one set of DSCs with identical components. We present multiple DSC impedance measurements on “identical” devices prepared using two different dyes and present a statistical analysis regarding the reproducibility.

    关键词： dye,statistical analysis,dye-sensitized solar cells,electrochemical impedance spectroscopy

    更新于2025-09-23 15:19:57

  • Approaches to The Hagfeldt Donor and Use of Next Generation Bulky Donor Designs in Dyea??Sensitized Solar Cell Dyes

    摘要： 'The Hagfeldt donor' is a bulky triarylamine building block with 4 alkyl chains in a 3-dimensional arrangement which is used with organic dyes in dye-sensitized solar cells (DSCs) in over 140 manuscripts. Many of the highest performing DSC devices in literature make use of this group due to exceptional TiO2 surface protection properties which slows recombination of electrons in TiO2 with the electrolyte. Importantly, record-setting cobalt and copper redox shuttle based-DSCs require exceptional surface protection to slow a facile recombination of electrons to these positively charged redox shuttles. Several syntheses have emerged for the Hagfeldt donor due to the need for iterative aryl-halide cross couplings complicating a straight forward route. The six synthetic strategies found in literature are described along with the challenges of each route. A recent method that has been put forward in the literature as a scalable, regioisomerically pure route is highlighted.

    关键词： dye design,masked halide,dye-sensitized solar cells,low recombination functionality,Hagfeldt donor

    更新于2025-09-23 15:19:57