- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Applying neoteric MgTiO3-coated TiO2 nanoparticulate films as scaffold layers in perovskite solar cells based on carbon counter electrode for retarding charge recombination
摘要： MgTiO3-coated TiO2 mesoporous scaffold layers were fabricated and applied in perovskite solar cells (PSCs) based on carbon counter electrode (CCE), in which TiO2 mesoporous layers were treated with different concentration of Mg2+ solution. Compared with PSCs based on pure TiO2 mesoporous layer, the open circuit voltage (Voc) and circuit photocurrent density (Jsc) of MgTiO3/TiO2-based devices significant improved. Intensive characterizations including scanning electron microscopy, electrochemical impedance spectroscopy can confirm that the presence of MgTiO3 shell layer can’t only retard charge recombination at CH3NH3PbI3/TiO2 interface, but also have a strong effect on the perovskite film growth. Based on the optimized treating concentration of 0.10 M, power conversion efficiency (PCE) of 10.39% could be achieved for the hole-conductor-free PSCs with excellent long-term stability, suggesting immense potential for large-scale industrial production in the future.
关键词： Carbon counter electrode,Perovskite solar cell,MgTiO3/TiO2,Mesoporous scaffold layer,Hole-conductor-free
更新于2025-09-23 15:19:57
-
Hybrid of Graphene based on quaternary Cu2ZnNiSe4 a??WO3 Nanorods for Counter Electrode in Dye-sensitized Solar Cell Application
摘要： A novel nanohybrid of graphene-based Cu2ZnniSe4 with WO3 nanorods (G-CZNS@W) was successfully synthesized via a simple hydrothermal method to use as a counter electrode (ce) for dye-sensitized solar cells (DSSCs). The characterization technique confirmed the structural and morphologies of the G-CZNS@W nanohybrid, which could show rapid electrons transfer pathway through the WO3 nanorods. Moreover, the as-fabricated G-CZNS@W nanohybrid exhibited synergetic effect between G-cZnS and a Wo3 nanorod, which could affect the electrocatalytic activity towards triiodide reaction. The nanohybrid exhibits an excellent photovoltaic performance of 12.16%, which is higher than that of the standard pt electrode under the same conditions. the G-cZnS@W nanohybrid material as ce thus offers a promising low-cost Pt-free counter electrode for DSSC.
关键词： Counter Electrode,Graphene,WO3 nanorods,Dye-sensitized Solar Cells,Cu2ZnniSe4
更新于2025-09-23 15:19:57
-
Achieving a superior electrocatalytic activity of carbon cloth via atomic layer deposition as a flexible counter electrode for efficient dye-sensitized solar cells
摘要： Dye-sensitized solar cell (DSSC) is appealing to renewable energy communities because of its attractive features of low cost, facile assembly and short energy payback time. Nevertheless, the commonly used platinum as the counter electrode (CE) encounters great difficulties in its scarcity and noble nature. Herein, we demonstrate a promising and facile route to attain an earth-abundant, high-conductivity Pt-free flexible CE with the controllable catalytic activity via the atomic layer deposition (ALD) of ZnO as the nanoscale sacrificial template. Our result reveals the electrocatalytic activity of carbon cloth as a function of surface morphology can be successfully tailored by the ALD cycle. It can be ascribed to the interplay of ZnO and carbon during carbothermic reduction, offering the synergetic effects of the defects and oxygen doping on the carbon cloth surface as the enhanced catalytic sites for the regeneration of triiodide into iodide. As a proof of concept, the DSSC using the activated carbon cloth via ALD is enabled to deliver a boosted conversion efficiency by 79%, as compared with that using pristine carbon cloth. Such a promising route can open up a perspective for reaching an earth-abundant, high-conductivity carbon-based flexible CE with the superior catalytic activity for the photoelectrochemical cells.
关键词： Pt-free counter electrode,Dye-sensitized solar cell,Carbon cloth,Atomic layer deposition,ZnO
更新于2025-09-23 15:19:57
-
Balance between the explored Pt counter electrode in an electrolyte medium and the photoanode for highly efficient liquid-junction photovoltaic devices
摘要： This work investigates the effect of the ratio of the explored Pt area in the electrolyte medium and the photoanode area (REP) on the performance of dye-sensitized solar cells (DSCs). As a result, the power conversion efficiency of DSCs increases by the ascending REP. The highest power conversion efficiency, which was obtained for the cell with the REP of 64/49, was 8.40%. Furthermore, the relationship between efficiency and fabrication cost is carefully discussed in terms of reducing or enhancing the surface area of CE compared to the photoanode’s surface area. The findings in this work may propose a way for a further development of efficient and large-scale DSCs in the future.
关键词： explored Pt area,photoanode,counter electrode,Dye-sensitized solar cells
更新于2025-09-23 15:19:57
-
Modification of Graphene based on Ba2Cu8Ni2Se12 Catalyst with CoS Nanosphere for Counter Electrode for Dye-sensitized solar cell
摘要： A novel Graphene-Ba2Cu8Ni2Se12 with CoS Nanosphere (GBC) was synthesized via a facile hydrothermal method for use as a Counter electrode (CE) in Dye-sensitized solar cells (DSSCs). In this work, the Ba2Cu8Ni2Se12 (BCNS) and CoS nanosphere were directly grown on graphene sheets with strong interaction. The morphology, electrochemical and photovoltaic performances of GBC were studied. The GBC CE in bifacial DSSCs showed higher power conversion efficiency (12.37%), which is comparable to the traditional Pt electrode (4.07%). This value noticeably that the synergetic effect of the GBC structure provides a large catalytic active area and excellent of electron transfer partway. The GBC CE exhibiting good device performance, which can serve as low-cost CE than Pt for the DSSC application.
关键词： CoS Nanosphere,Counter electrode,Graphene,Dye-sensitized solar cells,Ba2Cu8Ni2Se12
更新于2025-09-23 15:19:57
-
Plasma-processed CoSn/RGO nanocomposite: A low-cost and sustainable counter electrode for dye-sensitized solar cells
摘要： The high cost of state-of-the-art Pt counter electrodes (CEs) hinders the large-scale applications of dye-sensitized solar cells (DSCs). The development of Pt-free catalysts while maintaining state-of-the-art catalytic activity for CE materials is one mean to reduce costs. Here, CoxSn1-x/reduced graphene oxide (RGO) (0 ≤ x ≤ 1) nanohybrids were synthesized and employed as inexpensive, stable, and earth-abundant CEs in DSCs. The synthesis was performed through the plasma-assisted reduction of the oxygen functional groups of the graphene oxide along with the immobilization of bimetallic nanoparticles (NPs) on the surface of RGO. The optimization of the composition of the alloy NPs for the highest e?ciency of DSC yields the Co0.9Sn0.1/RGO nanocomposite. The highest device performance correlates well with the experimentally obtained lowest charge transfer resistance in conjunction with the highest electrocatalytic activity of the Co0.9Sn0.1/RGO CE. The DSC employed the synthesized CE showed good stability over long term operation. Both the developed CoSn/RGO nanohybrids and the strategy used for their synthesis are cost-e?ective. Our results provide economically implementable and green nanotechnology for e?cient and stable DSCs required for commercialization.
关键词： Plasma reduction,Bimetalic alloy CoxSn1-x,Nanohybrids,Reduced graphene oxide,Counter electrode,Dye-sensitized solar cells
更新于2025-09-23 15:19:57
-
High indoor performance of flexible organic photovoltaics using polymer electrodes
摘要： Indoor organic photovoltaics (OPVs) have gained tremendous attention due to their unique optoelectronic properties under dim and spectrally-limited indoor light conditions. Moreover, their excellent flexible features make them more suitable for powering various indoor electronic devices than other photovoltaic systems. In this article, we demonstrate the indoor photovoltaic performance of poly(3-hexylthiophene):indene-C60 bisadduct-based flexible OPVs with polymeric electrodes in comparison with reference OPVs with indium tin oxide (ITO) electrodes. For the flexible OPVs, poly (3, 4-ethylenedioxythiophene): poly (styrene-sulfonic acid)-based polymeric electrodes were demonstrated on a polyethylene naphthalate substrate with a polyvinyl alcohol buffer layer. The OPV with the polymeric electrode produced an average power conversion efficiency (PCE) of 11.1 ± 0.1%, whereas the reference device with the ITO electrode exhibited a PCE of 8.8 ± 0.1% under a 500-lx-light emitting diode condition. The flexible OPVs also exhibited superior flexibility over reference OPVs by retaining their PCE up to ~ 85% even after 500 bending cycles in air, whereas the reference OPVs declined to ~ 80% of their PCE under the same bending conditions.
关键词： Organic photovoltaics,Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate,Polymeric electrode,Indoor application,Parasitic resistance effects
更新于2025-09-23 15:19:57
-
All Antimony Chalcogenide Tandem Solar Cell
摘要： We demonstrate a proof-of-concept tandem solar cell using Sb2S3 and Sb2Se3 as top and bottom cell absorber materials. The band gaps of Sb2S3 and Sb2Se3 are 1.74 and 1.22 eV, perfectly satisfying the requirement of tandem solar cells. The application of few-layer graphene enables high transmittance and excellent interfacial contact in the top sub-cell. By controlling the thickness of the top cell for maximizing the spectral application, the tandem device delivers a power conversion efficiency of the 7.93%, which outperforms the individually optimized top cell (5.58%) and bottom cell (6.50%). Mechanistical investigation shows that the tandem device is able to make up voltage loss in the sub-cells, which is a critical concern in the current antimony chalcogenide solar cells. This study provides an alternative approach to enhancing the energy conversion efficiency of antimony selenosulfide.
关键词： antimony sulfide,energy conversion,semi-transparent electrode,tandem solar cell,antimony selenide
更新于2025-09-23 15:19:57
-
Anomalous Fano Resonance in Double Quantum Dot System Coupled to Superconductor
摘要： We analyze the influence of a local pairing on the quantum interference in nanoscopic systems. As a model system we choose the double quantum dot coupled to one metallic and one superconducting electrode in the T-shape geometry. The analysis is particularly valuable for systems containing coupled objects with considerably different broadening of energy levels. In such systems, the scattering of itinerant electrons on a discrete (or narrow) energy level gives rise to the Fano-type interference. Systems with induced superconducting order, along well understood fano resonances, exhibit also another features on the opposite side of the Fermi level. The lineshape of these resonances differs significantly from their reflection on the opposite side of the Fermi level, and their origin was not fully understood. Here, considering the spin-polarized tunneling model, we explain a microscopic mechanism of a formation of these resonances and discuss the nature of their uncommon lineshapes. We show that the anomalous Fano profiles originate solely from the pairing of nonscattered electrons with scattered ones. We investigate also the interplay of each type of resonances with the Kondo physics and discuss the resonant features in differential conductivity.
关键词： Kondo physics,Fano-type interference,quantum interference,spin-polarized tunneling model,differential conductivity,double quantum dot,superconducting electrode,nanoscopic systems
更新于2025-09-23 15:19:57
-
Highly efficient bifacial CsPbIBr <sub/>2</sub> solar cells with a TeO <sub/>2</sub> /Ag transparent electrode and unsymmetrical carrier transport behavior
摘要： Bright red CsPbIBr2 films possess intrinsic semitransparent features, which make them promising materials for smart photovoltaic windows, power plants, curtain walls, top cells for tandem solar cells, and bifacial photovoltaics. In this work, bifacial CsPbIBr2 perovskite solar cells (PSCs) have been fabricated by adopting an ultrathin silver (Ag) film transparent anode and a tellurium oxide (TeO2) optical modifying layer. The results showed that the transmittance of the TeO2 (40 nm)/Ag (11 nm) transparent top anode matched well with the light absorption range of the CsPbIBr2 film, and the resulting bifacial PSCs exhibited PCEs of 8.04% and 5.32% when illuminated from the FTO and Ag sides, respectively. By introducing cesium iodide-treated CsPbIBr2 layers, the PSCs achieved superior PCEs of 8.46% (FTO side) and 6.40% (Ag side) with a bifacial factor of 75.65%, which is the best performance of bifacial CsPbIBr2 PSCs reported to date. Interestingly, an identical cell showed a significantly higher fill factor, more efficient carrier transport, and better efficiency and stability when illuminated from the Ag side than from the FTO side, a phenomenon strongly related to the parasitic absorption of the spiro-OMeTAD layer below 420 nm. Consequently, we have found a route similar to “shooting fish in a barrel” to enhance the carrier transport, suppress the carrier recombination, and improve the stability of bifacial semitransparent CsPbIBr2 PSCs: turning the Ag side towards the sun.
关键词： unsymmetrical carrier transport behavior,perovskite solar cells,TeO2/Ag transparent electrode,bifacial CsPbIBr2 solar cells,semitransparent photovoltaics
更新于2025-09-23 15:19:57