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Dual-band luminescent solar converter-coupled dye-sensitized solar cells for high performance semi-transparent photovoltaic device
摘要： We demonstrate a high-performance semi-transparent solar cell using a dye-sensitized solar cell (DSSC) coupled with a luminescent solar converter (LSC) that absorbs a dual band. We present an architecture of a sandwich-type, downshift (DS) LSC / DSSC / upconversion (UC) LSC. The DS LSC, including anthracene, converts ultraviolet light to visible light, and the UC LSC, which contains a dye pair of meso-tetraphenyl-tetrabenzoporphine palladium / 9,10-bis-penylethynyllanthrancane, converts near-infrared light into visible light. Thus, the dual band LSC improved the power conversion efficiency (PCE) of the DSSC without a significant decrease in visible transmittance. We optimize the concentration of the fluorescence dye to obtain maximum photoluminescence in each LSC. We also optimize backward scattering by introducing nanoparticle scatterers in UC LSC. The dual LSC-DSSC showed an average visible transmittance of 42% and achieved an PCE of up to 7.8%. Our incorporation of broadband-wavelength-harvestable LSCs with a DSSC presents a direction for semi-transparent photovoltaic devices.
关键词： Luminescence solar concentrator,Semi-transparent photovoltaic devices,Downshift,Photon upconversion,Dye-sensitized solar cells
更新于2025-11-19 16:46:39
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Bulk-heterojunction polymer photovoltaic cells manufactured using non-halogenated and non-aromatic solvent
摘要： The use of photovoltaic devices as converters of solar energy into electricity is a relevant technology to the global energy needs and, at the same time, it mitigates the negative impact on the environment caused by conventional sources. Although polymer solar cells are properly considered as clean and renewable source of electricity production, the processing involved in the manufacture of such devices still contains toxic elements. The formation of thin films of active layer in bulk-heterojunction organic solar cells, as example, usually uses halogenated solvents as chlorobenzene (CB), dichlorobenzene (DCB), or chloroform (CF), which represent certain risks of toxicity to the human body and to the environment. This work aims to show that it is possible to manufacture organic solar cells using less-toxic solvents, in special to the environment, whose final efficiency results are similar to those that have been processed by conventional halogenated solvents. With the aid of the Hansen solubility parameters (HSP), we identified non-halogenated and non-aromatic solvent that showed chemical compatibility with donor polymers and acceptor molecules used in the device’s active layer. The fabricated devices were then characterized and their photovoltaic responses compared to the conventional equivalents.
关键词： non-halogenated solvents,polymer solar cells,photovoltaic devices,non-aromatic solvents,solar energy,halogenated solvents,Hansen solubility parameters
更新于2025-09-23 15:21:01
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Impact of electrona??phonon coupling on the quantum yield of photovoltaic devices
摘要： In describing the charge carriers’ separation mechanism in the organic solar cell, providing a method, which considers the impact of all parameters of interest on the same footing within an inexpensive numerical effort, could play an essential role. We use here a simple tight-binding model to describe the dissociation of the charge carriers and investigate their dependence on the physical parameters of the system. We demonstrate that the quantum yield of the cell is subtly controlled by the collective action of the Coulomb interaction of the electron–hole pair, electron–phonon coupling, and the geminate recombination of the charge carriers. This approach should help us understand the performance of organic solar cells and optimize their efficiency.
关键词： electron–phonon coupling,quantum yield,organic solar cells,charge separation,photovoltaic devices
更新于2025-09-23 15:19:57
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A simple route for manufacture of photovoltaic devices based on chalcohalide nanowires
摘要： The one-dimensional nanostructures of antimony sulfoiodide (SbSI) have received in last decade a great attention due to their outstanding photoferroelectric properties combined with narrow energy band gap beneficial for effective conversion of visible light into electric signal. This paper reports for the first time a simple and fast route for fabrication of photovoltaic devices based on SbSI nanowires. This method involves sonochemical synthesis of SbSI nanowires and spin-coating SbSI-polyacrylonitrile (PAN) composite, on indium tin oxide (ITO) substrate. In order to promote efficient charge transfer titanium dioxide (TiO2) and poly(3-hexylthiophene) (P3HT) were applied as an electron and hole transporting layers, respectively. Proposed method can be realized at mild conditions and does not require any additional high temperature treatment in contrast to other methods known for fabrication of SbSI photovoltaic structures. Fabricated structures exhibited an average short-circuit current density of 1.84(20) μA/cm2 and open circuit voltage of 69(13) mV under a white light illumination with power density of 100 mW/cm2. SbSI nanowires as lead-free nanomaterials are promising for solar energy harvesting and an application in photodetectors, that can operate in self-powered mode.
关键词： Nanocomposite,Self-powered photodetectors,Nanowires,Polyacrylonitrile (PAN),Antimony sulfoiodide (SbSI),Photovoltaic devices
更新于2025-09-23 15:19:57
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Electrodeposition of hierarchical zinc oxide nanostructures on metal meshes as photoanodes for flexible dye-sensitized solar cells
摘要： Hierarchical zinc oxide (ZnO) nanorod arrays (ZNRAs) were fabricated on stainless steel meshes via a two-step electrodeposition approach as flexible dye-sensitized solar cells (DSSCs) photoanodes. The two-step electrodeposition was realized by deposition of primary ZNRAs followed by growth of secondary branched ZnO nanorods on the primary ZnO nanorods surfaces. The morphologies of ZNRAs and the photovoltaic performances of the assembled DSSCs with different deposition conditions of primary ZNRAs were compared in detail. After modulating electrodeposition conditions, the DSSC assembled with hierarchical ZNRAs obtained an optimum photovoltaic performance with power conversion efficiency of 1.81 %.
关键词： Electrodeposition,Zinc oxide,Stainless steel mesh,Dye-sensitized solar cells,Flexible photovoltaic devices
更新于2025-09-23 15:19:57
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Quantifying Large Lattice Relaxations in Photovoltaic Devices
摘要： Temporal variations of Cu(In, Ga)Se2 photovoltaic device properties during light exposure at various temperatures and voltage biases for times up to 100 h are analyzed using the kinetic theory of large lattice relaxations. Open-circuit voltage and p-type doping increased with charge injection and decreased with temperature at low injection conditions. Lattice relaxation can account for both trends and activation energies extracted from the data are approximately 0.9 and 1.2 eV for devices with lower and higher sodium content, respectively. In these devices, increased sodium content resulted in higher initial p-type doping with greater stability. First-principles calculations providing revised activation energies for the (VSe ? VCu) complex suggest that this defect does not account for the metastability observed here.
关键词： sodium content,lattice relaxations,metastability,CIGS,photovoltaic devices
更新于2025-09-23 15:19:57
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Domain Wall Conduction in Calcium-Modified Lead Titanate for Polarization Tunable Photovoltaic Devices
摘要： By virtue of the domain wall conduction and polarization tunable charge transport properties of ferroelectrics, Qian et al. theoretically demonstrate evidence of electric conduction in domain walls. They successfully fabricate Pb0.8Ca0.2TiO3-based photovoltaic devices with tunable photovoltaic performance by external poling.
关键词： Pb0.8Ca0.2TiO3,Photovoltaic devices,Polarization tunable,Domain wall conduction,Ferroelectric
更新于2025-09-23 15:19:57
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Grain Boundary and Interface Passivation with Corea??Shell Au@CdS Nanospheres for Higha??Efficiency Perovskite Solar Cells
摘要： The plasmonic characteristic of core–shell nanomaterials can effectively improve exciton-generation/dissociation and carrier-transfer/collection. In this work, a new strategy based on core–shell Au@CdS nanospheres is introduced to passivate perovskite grain boundaries (GBs) and the perovskite/hole transport layer interface via an antisolvent process. These core–shell Au@CdS nanoparticles can trigger heterogeneous nucleation of the perovskite precursor for high-quality perovskite films through the formation of the intermediate Au@CdS–PbI2 adduct, which can lower the valence band maximum of the 2,2,7,7-tetrakis(N,N-di-p-methoxyphenyl-amine)9,9-spirobifluorene (Spiro-OMeTAD) for a more favorable energy alignment with the perovskite material. With the help of the localized surface plasmon resonance effect of Au@CdS, holes can easily overcome the barrier at the perovskite/Spiro-OMeTAD interface (or GBs) through the bridge of the intermediate Au@CdS–PbI2, avoiding the carrier accumulation, and suppress the carrier trap recombination at the Spiro-OMeTAD/perovskite interface. Consequently, the Au@CdS-based perovskite solar cell device achieves a high efficiency of over 21%, with excellent stability of ≈90% retention of initial power conversion efficiencies after 45 days storage in dry air.
关键词： perovskite photovoltaic devices,interface passivation,Au@CdS,core–shell nanoparticles
更新于2025-09-19 17:13:59
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Overcurrent Electrodeposition of Fractal Plasmonic Black Gold with Broad-Band Absorption Properties for Excitation-Immune SERS
摘要： The dependence of plasmon resonance on the size, shape, and interparticle spacing of single, isolated nanostructures inherently limits their light-harvesting capability to a narrow spectral band. Here, we report a facile overcurrent electrodeposition strategy to prepare fractal plasmonic black gold (B-Au) with broad-band absorption properties (over 80% throughout the range of 300?1800 nm). The broad-band absorption properties are attributed to the excitation of multiple plasmons in the B-Au, which results in strong light?matter interaction over a broad-band spectral window. Consequently, the B-Au can produce strong broad-band surface-enhanced Raman scattering (SERS) regardless of the excitation light used. These ?ndings demonstrate that the fractal B-Au allows e?cient utilization of broad spectral photons and opens up exciting opportunities for highly sensitive SERS detection, photocatalysis, and photovoltaic devices.
关键词： broad-band absorption,surface-enhanced Raman scattering,fractal plasmonic black gold,photocatalysis,SERS,photovoltaic devices
更新于2025-09-19 17:13:59
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High Figure-of-Merit Transparent Copper–Zinc Oxide Window Electrodes for Organic Photovoltaics
摘要： We report a copper–zinc oxide bilayer electrode supported on ?exible polyethylene terephthalate (PET) with a sheet resistance of 11. 3 (cid:127) sq?1 and average transparency of 84.6% in the wavelength range of 400–800 nm. The copper ?lm is perforated with a dense array of sub-micron diameter apertures fabricated using polymer-blend lithography, which imparts broad band anti-re?ectivity. We demonstrate proof-of-principle that it is possible to fabricate the polymer mask by dip coating which is a scalable deposition method compatible with roll-to-roll processing. During storage of the electrode at ambient temperature the ZnO layer is spontaneously doped with copper from the underlying copper ?lm and so the thin ZnO layer serves both as an anti-re?ecting layer and an excellent electron transport layer. When compared with commercially available indium tin oxide coated (ITO) plastic substrates this electrode exhibits superior stability towards bending deformation, with no change in sheet resistance after bending through a 4 mm radius of curvature 100 times. Model inverted organic photovoltaic (OPV) devices using this electrode exhibit a champion power conversion ef?ciency of ～8.7%, which is the highest reported ef?ciency to date for an OPV device using a copper based transparent electrode, outperforming identical devices using ITO coated plastic as the transparent electrode.
关键词： inverted photovoltaic devices,polymer-blend lithography,?exible,transparent electrode,copper
更新于2025-09-19 17:13:59