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A simple method to synthesize low-cost carbon modified TiO <sub/>2</sub> counter electrodes for high-efficiency dye-sensitized solar cells
摘要： Low cost and stable counter electrodes (CE) for dye-sensitized solar cells (DSSC) are promising for widespread use. In this paper, we report a simple and effective method to synthesize carbon modified TiO2 (TiO2/C) thin film as an abundant low cost CE for high-efficiency DSSC. The TiO2 paste layer contained organic compound was deposited on FTO glass substrate by a screen-printing method. When annealing the TiO2 paste layer at 450–550 °C under Ar flow, these organic compounds are decomposed to carbon to form carbon coated TiO2 nanoparticles. When used as a CE of DSSCs, the experimental results point out that the photoelectric conversion efficiency of DSSCs was obviously improved to near that of the referenced Pt CE. For TiO2/C is one of the cheapest and most stable materials, this TiO2/C can be used as a low cost CE for large scale high efficient DSSCs.
关键词： carbon nano materials,solar energy materials,counter electrode,dye-sensitized solar cell
更新于2025-11-14 17:04:02
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Efficient degradation of phenol using Sn4+ doped FeOCl as photo-Fenton catalyst
摘要： Sn4+ doped FeOCl has been successfully synthetized as a sunlight-driven photo-Fenton catalyst, which shows that the catalytic activity of Sn4+/FeOCl (1.08% Sn4+ in the Sn4+/FeOCl) is a factor of 11.8 time higher than that of FeOCl. The doping of Sn4+ in FeOCl increases the optical adsorption and surface area of FeOCl. The decreased chemical bond strength of Fe-Cl in Sn4+/FeOCl effectively increases the number of exposed active sites (Fe-site and Sn-site), which boosts the production of ·OH radicals. The Sn-site shows higher catalytic activity than Fe-site. A synergistic mechanism for Sn4+/FeOCl is proposed for the enhanced catalytic performance.
关键词： Solar energy materials,FeOCl,Phenol,Nanocomposites,Fenton reaction,Sn4+
更新于2025-09-23 15:23:52
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Efficient visible-light-responsive photocatalyst: Hybrid TiO2-Ag3PO4 nanorods
摘要： Herein, ordered TiO2-Ag3PO4 nanorods are fabricated by loading Ag3PO4 nanoparticles on the as-prepared brookite TiO2 nanorods. The amount of Ag3PO4 nanoparticles loaded on brookite TiO2 nanorods can be rationally optimized. These hybrid TiO2-Ag3PO4 nanorods could provide large surface area, extend the visible light absorption and facilitate the charge separation, leading to efficient visible-light-driven photocatalytic performance. When evaluated as photocatalysts under visible light illumination, all the hybrid TiO2-Ag3PO4 nanorods exhibit high photocatalytic activity for degrading 2-propanol. Particularly, TiO2-Ag3PO4-3 enables the best photocatalytic property, which yields high acetone production of 147 ppm at 3 h and CO2 production of 424 ppm at 11 h.
关键词： TiO2-Ag3PO4,Visible-light-responsive,Nanocomposites,Solar energy materials
更新于2025-09-23 15:22:29
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Performance and stability enhancement of Cu(InGa)Se2 solar cells on ultrathin glass by potassium incorporation
摘要： Flexible Cu(InGa)Se2 solar cells fabricated on metal foils and plastics have achieved high conversion efficiency so far. However, metal impurities and low temperature tolerance hinder them from further considerable development. Here, 150 lm-thick ultrathin glass with desirable advantages was applied as substrate for Cu(InGa)Se2 solar cell. Potassium element was doped by a simple method during the post-selenization process. The results showed that the KInSe2 phase existed in K-doped Cu(InGa)Se2 films. The K-doped CIGS films were more compact than the pristine one due to the fact that K incorporated in films could form quasi-liquid alkali-metal-Se compounds and improve the compactness of films. K-incorporated CIGS films exhibited enhanced p-type conductivity and different surface energy level. Consequently, K-doped Cu(InGa)Se2 solar cell achieved an optimal efficiency of 8.3%, which was relatively 43% higher than that of pristine solar cell. Investigation of performance and stability of solar cells manifested that the K incorporation retarded the performance degradation of device during cyclic bending.
关键词： Potassium incorporation,Ultrathin glass,Cu(InGa)Se2,Thin films,Solar energy materials
更新于2025-09-23 15:21:01
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The preparation of plasmonic Au@SiO2 NPs and its application in polymer solar cells
摘要： We prepared plasmonic Au@SiO2 NPs with good quality and doped them into PEDOT: PSS layer of PC71BM-based PSCs. These Au@SiO2 NPs could greatly increase the light absorption of active layer mainly due to near field enhancement, thus resulting in an improved photocurrent. Finally, a maximum PCE of 9.55% with a 16.3% enhancement was achieved for PTB7-Th: PC71BM based devices, which is the highest value reported so far.
关键词： solar energy materials,nanocomposites,Nanoparticles
更新于2025-09-19 17:13:59
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Na incorporation controlled single phase kesterite Cu2ZnSnS4 solar cell material
摘要： It is theoretically and experimentally challenging to fabricate single phase Cu2ZnSnS4 (CZTS) and more difficult to synthesize it by sol-gel method. Theoretical work reveals that Na can passivate the dangling bonds in the grain boundaries of CZTS and thus enhance the photovoltaic performance. Therefore, Na incorporation may be an effective way in passivating defects in CZTS films and fabricating CZTS with high quality and single phase. In this study, we will try to incorporate Na into CZTS films by sol-gel method to help passivate defects in CZTS and achieve single phase kesterite CZTS films using a different solvent 2-methoxybutanol. Different Na/(Cu+Zn+Sn) atomic ratios (0%-3%) will be employed. Through controlling Na incorporation amount in solution, we can prevent the generation of other phases like SnO2 and a pure single phase kesterite CZTS can be achieved. The optical band gap of the optimal CZTS film is 1.24 eV. All Na doped CZTS films show p-type conduction behavior.
关键词： Solar energy materials,Sol-gel preparation,Crystal structure
更新于2025-09-19 17:13:59
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Novel KFeO<sub>2</sub> nanoparticles for dye-sensitized solar cell
摘要： Novel KFeO2 nanoparticles for dye-sensitized solar cell. Environmentally clean and green source of energy is solar energy that can meet the increasing demand for energy. Recent trends in solar energy reflect that delafossite materials getting more attention because of its low-cost production and easy method of synthesis, non-toxic nature, environment-friendly nature, degradability compared to the silicon. In this direction, delafossite KFeO2 nanoparticles have synthesized by chemical method and used as photo-anode material for dye-sensitized solar cells (DSSC). The structural, morphological, optical and photovoltaic properties of KFeO2 nanoparticles have been investigated. Transmission electron microscopy (TEM) study reveals that the KFeO2 nanoparticles exhibit spherical morphology with particle size 12 nm. Rietveld refinement of x-ray diffraction (XRD) patterns of KFeO2 reflects, its orthorhombic phase with Pbca space group. The optical study reveals that the bandgap of the KFeO2 nanoparticles lying in the visible range of spectrum, i.e., 1.88 eV. The DSSC has been fabricated using KFeO2 nanoparticles. The power conversion efficiency parameters is 0.84 V; 4.72 mA/cm2; 64% and 2.54% respectively, for open-circuit voltage (VOC), short circuit current–density (JSC), fill factor (FF) and Power conversion efficiency for fabricated DSSC. It has been found that the efficiency of fabricated DSSC has been decrease to 2.27% after 45 days.
关键词： Dye sensitized solar energy materials,KFeO2,Sol-gel synthesis,Nanoparticles
更新于2025-09-19 17:13:59
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Polyaniline/graphene nanocomposites as counter electrode materials for platinum free dye-sensitized solar cells (DSSCSs)
摘要： The objective of this work is to fabricate the efficient and Pt-free DSSCs. Nanocomposites of PANi/graphene have been synthesized via in-situ polymerization of aniline in the graphene acidic dispersion. The morphology and the distribution of particles in composites have been analyzed by Scanning Electron Microscopy (SEM). The electrochemical performance of PANi/Graphene nanocomposites has been investigated by Tafel test. Results found here show that the graphene/polyaniline composites as catalyst materials show an outstanding electrochemical activity in DSSCs. Under optimal conditions, DSSC with PANi/Graphene shows the power-conversion-efficiency (PCE) of 7.45%, which is slightly lower than that of Pt-based DSSC (7.63%) fabricated under similar conditions.
关键词： DSSC,Polymeric composites,Solar energy materials,Efficiency
更新于2025-09-16 10:30:52
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Double perovskite Cs4CuSb2Cl12 microcrystalline device for cost effective photodetector applications
摘要： Recently reported double perovskites (DPs), Cs4CuSb2Cl12 has led to the development of a new lead free perovskite. It is 1 eV band gap material. The perovskite microcrystals were synthesized via liquid phase method. This was investigated as active solar energy materials for visible-light photodetector. The microcrystalline device was made in a single-step printable Cs4CuSb2Cl12/carbon materials composite paste. 10 wt % active material composite was found to be the best candidate for the highest responsivity, 10 ―3 A/W and detectivity, 108 J. One-step printing of the composite paste can be used for cost effective photodetector applications.
关键词： Photodetector,Solar energy materials,Cesium Copper Antimony Chloride (Cs4CuSb2Cl12),Carbon materials,Double Perovskite
更新于2025-09-12 10:27:22
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Mono- and bi-cyanoacrylic acid substituted phenothiazine based sensitizers for dye sensitized solar cells
摘要： Phenothiazine and cyanoacrylic acid moiety based sensitizers were synthesized for dye sensitized solar cell application. Absorption and electrochemical properties of the sensitizers having mono- and bi-substituted cyanoacrylic acids were studied. The mono-cyanoacrylic acid substituted phenothiazine sensitizer has more light harvesting ability due to its high molar extinction coefficient. The photovoltaic performance of mono-cyanoacrylic acid substituted phenothiazine sensitizer was slightly greater compared to the bi-cyanoacrylic acid substituted phenothiazine sensitizer which was attributed to the effect of anchoring groups in the sensitizer.
关键词： Solar energy materials,Spectroscopy,Anchoring group,Dye sensitized solar cells,Phenothiazine
更新于2025-09-12 10:27:22