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- 实验方案
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An All Carbon Dye Sensitized Solar Cell: A Sustainable and Low-Cost Design for Metal Free Wearable Solar Cell Devices
摘要： Lightweight carbon electrodes are the new candidates for photovoltaic devices due to their temperature resistivity, ease of fabrication, and skin comfortability. Herein, a sustainable and facile strategy has been proposed for metal free all carbon dye sensitized solar cell (C-DSSC), assembled by stacking carbon front electrode (CFE) and carbon counter electrode (CCE). The CFE demonstrated adequate light transmittance (70-50%) while maintaining efficient photon absorption and charge separation mechanism due to dye coated TiO2 nanorods (P25-R). The graphene dip coated carbon counter electrode (Gr@CCE) possesses remarkable highly electro catalytic activity towards 3 /I ― I ― redox couple with low charge transfer resistance (RCT=0.79 ?). The sustainable design of C-DSSC attained ~6±0.5 % efficiency with high photocurrent density of 18.835 mA. cm-2. The superior performance of C-DSSC is accredited to its improved charge mobility, low internal resistance, and better interfacial electrode contact. The thickness of C-DSSC is ≤3 mm eliminates the need for rigid glass in DSSC.
关键词： Carbon,TiO2 nanorods,Dye sensitized solar cell,Graphene,Electrocatalytic activity
更新于2025-09-23 15:19:57
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Porous membrane of polyindole and polymeric ionic liquid incorporated PMMA for efficient quasi-solid state dye sensitized solar cell
摘要： Stable and efficient electrolyte for effective solar energy conversion is a persistent aim of dye-sensitized solar cell (DSSC). In this work, a novel honeycomb-like porous membrane (PMMA/PIL/PIN) based quasi-solid state (QSS) electrolyte was prepared by using the mixtures of synthesized polyindole (PIN),poly(3-decyl-1-vinyl imidazolium iodide) (PIL) and PMMA through non-solvent induced phase inversion method. The membranes were characterized in terms of their structure, morphology, physical properties (electrolyte uptake, porosity) and their photovoltaic and electrochemical effects as electrolyte in DSSC device were investigated. PMMA/PIL/PIN membrane was compared with PMMA/PIL, PMMA membrane and liquid electrolyte (LE) for their performance. The best QSS-DSSC with PMMA/PIL/PIN membrane exhibited high open circuit voltage (Voc), good short circuit current density (Jsc), comparable power conversion efficiency (η = 5.96%) and superior stability (up to 84% of its initial conversion efficiency after 250 h) compared to LE based DSSC. This innovative PMMA/PIL/PIN membrane based electrolyte pronounces the promising aspect for advancement in excellent performance of QSS-DSSC.
关键词： Polyindole,polymeric ionic liquid,polymer electrolyte,phase inversion,Dye sensitized solar cell
更新于2025-09-23 15:19:57
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Iron Oxide and Iron Sulfide Films Prepared for Dye-Sensitized Solar Cells
摘要： In this paper, the prospects of iron oxide ?lms and their sul?dation for dye-sensitized solar cells (DSSC) are reviewed. Iron oxide thin ?lms were prepared by hollow cathode plasma jet (HCPJ) sputtering, with an admixture of oxygen in the argon working gas and with an iron nozzle as the sputtering target. The discharge was powered by a constant current source in continuous mode and by a constant voltage source in pulsed mode. Plasma composition was measured by an energy-resolved mass spectrometer. Moreover, secondary electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), absorption and Raman spectra of the ?lms are presented. Strong correlation between the color of the iron oxide ?lm and its phase composition was revealed. Iron oxide ?lms were sul?ded at 350 °C. A relatively clean pyrite phase was obtained from the magnetite, while the marcasite with admixture of the pyrite phase was obtained from the hematite. Low in?uence of sul?dation on the ?lms’ microstructure was demonstrated.
关键词： iron oxide,absorption spectroscopy,hollow cathode plasma jet,dye-sensitized solar cell,iron sul?de
更新于2025-09-23 15:19:57
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A novel hybrid system consisting of a dye-sensitized solar cell and an absorption refrigerator for power and cooling cogeneration
摘要： To improve the energy conversion e?ciency of a dye-sensitized solar cell (DSSC), a novel hybrid system representatively consisting of a DSSC and an absorption refrigerator (APR) is put forward, in which the APR is used to thermally harness the part of high wavelength sunlight that not converted by the DSSC. The amount of heat from the DSSC is calculated, and mathematical formula for energy conversion e?ciencies and output powers of the DSSC, APR and hybrid system are derived. Numerical calculations show that the maximum output power density and maximum energy conversion e?ciency of hybrid system are enhanced by 9.93% and 9.92% in comparison with that of the single DSSC, respectively. Integration of APR to DSSC is a feasible route to effectively improve the energy conversion e?ciency. Comprehensive sensitivity analyses are conducted to explore how the whole hybrid system performance depends on various working conditions and designing parameters, including porous nano-TiO 2 ?lm thickness, photoelectron absorption coe?cient, internal irreversibility factor, heat transfer coe?cient and various temperatures. The research results can provide some new understandings for further enhancing the DSSC performance.
关键词： Parametric study,Dye-sensitized solar cell,E?ciency,Absorption refrigerator,Hybrid system,Output power density
更新于2025-09-23 15:19:57
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Fabrication and characterization of metal oxide and lignocelluloses fibers based working electrode for dye-sensitized solar cells (DSSCs)
摘要： This study presents the fabrication of flexible composite sheets of titanium dioxide (TiO2) by incorporation of natural lignocelluloses fibers extracted from the self-growing plant, Typha Angustifolia to address the inherent rigid structure and superior absorption properties of the working electrode. Furthermore, fabricated TiO2 based composites were characterized by scanning electron microscope (SEM), Fourier transforms infrared (FTIR), ultraviolet-visible (UV-VIS) spectroscopy and employed as a working electrode for DSSC after deposition on fluorine doped tin oxide (FTO) glass substrate. SEM morphology reveals that LC fibers acted as a thread to bind the TiO2 nanoparticles and also with better voids for adsorption of electrolyte whereas FTIR spectroscopy confirms the successful formation of the paper composite. J-V measurements reveal the high efficiency of 2.95% for TiO2/LC flexible and environmentally safe composite which can be feasible for modern bendable DSSC.
关键词： Working Electrode,TiO2,Dye-Sensitized Solar Cell,lignocelluloses fibers
更新于2025-09-23 15:19:57
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Modification of reduced graphene oxide layers by electron-withdrawing/donating units on molecular dopants: Facile metal-free counter electrode electrocatalysts for dye-sensitized solar cells
摘要： Small molecules of aniline (AN) and nitrobenzene (NB) doped on reduced graphene oxide nanosheets (rGO) represent the attractive Pt-free and earth abundant counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). Scanning electron microscope and transmission electron microscope confirm a very thin layer structure with wrinkled and folded nanosheets. The binding between AN or NB and rGO is confirmed by Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). In this work, two different redox electrolytes are investigated: I?/I3? and [Co(bpy)3]3+/2+. Compared to rGO electrode-based DSSCs, the AN-rGO (1:10) and NB-rGO (1:10) electrode-based DSSCs applying I?/I3? and [Co(bpy)3]3+/2+ electrolytes show 40–50% and 30–35% increase in power conversion efficiency, respectively. Furthermore, both AN-rGO (1:10) and NB-rGO (1:10) perform stably upon electrochemical continuous test. Such excellent photoelectric performance correlates with the induced charge transfer between reduced graphene oxide and the molecules which effectively promotes the reduction and regeneration of I?/I3? and [Co(bpy)3]3+/2+ ions.
关键词： Electrocatalyst,Dye-sensitized solar cell,Molecular dopant,Reduced graphene oxide,Counter electrode
更新于2025-09-23 15:19:57
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Highly efficient bio-based porous carbon hybridized with tungsten carbide as counter electrode for dye-sensitized solar cell
摘要： Bio-based porous carbon (CMA and CTA) are successfully prepared from waste carton via microwave-assisted activation (MA) and two-step chemical activation (TA) methods, respectively. The as-prepared CTA sample exhibits higher specific surface area (824.16 m2 g?1) and larger total pore volume (0.71 cm3 g?1), as compared with those of the CMA sample (655.36 m2 g?1 and 0.62 cm3 g?1, correspondingly). The higher specific surface area could provide more catalytic sites; thus, the dye-sensitized solar cell (DSSC) assembled with a CTA counter electrode (CE) deliver a power conversion efficiency (PCE) of 6.76%, surpass the CMA-based DSSC (6.19%). Further, tungsten carbide (WC) are introduced into CTA and CMA to form hybrid catalysts (WC/CTA and WC/CMA, respectively) in order to improve their catalytic activities. Benefitting from the synergistic effect of bio-based porous carbon and WC, the DSSCs with WC/CTA and WC/CMA CEs exhibit superior PCE values of 7.32% and 6.85%, respectively, close to Pt (7.51%). This work provides an effective strategy for synthesizing low-cost and high-performance hybrid catalysts from bio-based carbon to achieve resource utilization of biomass waste in new energy fields.
关键词： Electrocatalyst,Counter electrode,Bio-based carbon,Tungsten carbide,Dye-sensitized solar cell
更新于2025-09-23 15:19:57
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Niobium doped TiO2 nanorod arrays as efficient electron transport materials in photovoltaic
摘要： One-dimensional (1-D) rutile TiO2 nanorod arrays (NRAs) synthesized by a hydrothermal method suffer from low electrical conductivity and large amounts of surface defects, hindering their further applications. Nb doping is thus introduced to modify their electronic properties. Results indicate that light Nb doping reduces rod nanosizes, increases electron concentrations, decreases surface defective oxides and lowers conduction band of the TiO2 NRAs, while heavy doping induces transformations of morphologies and crystalline orientations as well as occurrences of compositional deviations and low oxidative states of Ti3t. After 0.1 mol% and 1 mol% Nb incorporations, device efficiencies are substantially improved by ~16% and ~33% for the model perovskite and dye-sensitized solar cells, respectively, which are ascribed to reduced recombination at the perovskite/TiO2 interfaces (e.g. charge lifetime increasing from 62 μs to 107 μs) and improved electron transport through the photoanode of TiO2 NRAs (e.g. electron diffusion length increasing from ~14 μm to ~50 μm). Our study verifies that Nb doped 1-D TiO2 NRAs are versatile electron transporting materials in different kinds of emerging solar cells, and are also potential for other fields including photocatalysis, sensors and batteries etc.
关键词： TiO2 nanorod array,Dye-sensitized solar cell,Niobium doping,Charge transport,Perovskite solar cell,Recombination
更新于2025-09-19 17:13:59
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New engineered and environmentally friendly dye‐sensitized solar cells: Efficient extraction of dyes from Cytisus, <i>Alcea rosea</i> , and Roselle
摘要： In this study, an efficient extraction of natural dyes from three plants such as Cytisus, Alcea rosea, and Roselle was carried out by solid‐liquid extraction method. Extraction conditions were optimized using the Response Surface Methodology (RSM). Temperature, time, and solvent ratio of extractions were the variables, and absorption intensities in maximum wavelength of extracted samples were the response of experiments. Optimum extraction conditions for the Cytisus, A rosea, and Roselle flowers were at 55°C in 60 minutes, 44°C in 40 minutes, and 54°C in 32 minutes, respectively. Also, the best solvent for extraction of dyes was pure ethanol and pure water, respectively, for the Cytisus, A rosea, and Rosell. Moreover, results of the study showed that absorption intensities of the Cytisus, A rosea, and Roselle were equal to 1.182 at 400 nm, 1.532 at 540 nm, and 1.932 at 520 nm, respectively. To fabricate solar cells, anode electrode was coated by a thin layer of TiO2. The surface morphology of TiO2 film investigated by SEM and AFM showed a suitable homogeneity of TiO2 film without crack with an average particle size of 25 to 30 nm. Atomic force microscopy (AFM) images demonstrated that the average roughness of TiO2 thin film is about 205 nm, while the surface roughnesses of anodes was equal to 154, 101, and 119 nm after applying the Cytisus, Roselle, and A rosea on TiO2 film, respectively. Fabricated solar cells were characterized by photovoltaic and IPCE tests. Results represented that fabricated solar cells synthesized by extracted dye from Roselle had the best performance compared with other cells. The efficiency of this cell was equal to 0.842%, with an open‐circuit voltage (Voc) of 0.644, a short‐circuit current (Jsc) of 1.912, a fill factor (FF) of 0.683, and an incident photon‐to‐current efficiency (IPCE) of 18.943%.
关键词： Alcea Rosea,dye‐sensitized solar cell,Response Surface Methodology,dye extraction,Cytisus,Roselle
更新于2025-09-19 17:13:59
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Co-electrodeposited Cu2ZnSnS4 thin films for P-N junction photovoltaics and dye sensitized solar cells
摘要： Copper Zinc Tin Sulphide (Cu2ZnSnS4/CZTS) thin films were deposited on fluorine/indium doped tin oxide (FTO/ITO) coated glass substrates by one step electrodeposition method followed by annealing in nitrogen gas carrying sulphur vapors for 15 min. Formation of pure Cu2ZnSnS4 phase was confirmed by X-Ray Diffraction and Raman spectroscopy. Surface morphology of the films was analyzed using field emission scanning electron microscopy. Optical measurements using UV–visible spectroscopy showed absorption coefficients in the order of 104–105 cm?1 and optical band gap of ～1.48 eV. Simple p-n junctions were formed by electrodepositing CZTS on cadmium sulphide thin films coated over ITO substrates and subsequent annealing. Current-voltage (I–V) characteristics of the junction showed a knee voltage of about 0.9 V indicating that a good open circuit voltage (Voc) can be obtained from a solar cell constructed using this junction. CZTS films deposited on FTO substrates were used as counter electrode (CE) in dye sensitized solar cell (DSSC) to demonstrate CZTS as a potential substitute to the conventional platinum CE. Performance of the DSSC with CZTS CE was evaluated in comparison to Pt by determining the I-V characteristics under 1 sun illumination. The DSSC showed Voc of 0.77 V, short circuit current density of 1.85 mAcm?2, fill factor of 70.4% and 1% power conversion efficiency.
关键词： Non-hydrazine route,Solar energy material,Counter electrode,P-n junction,Co-electrodeposition,Dye sensitized solar cell
更新于2025-09-19 17:13:59