- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
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
-
High-Efficiency Thermophotovoltaic System That Employs an Emitter Based on a Silicon Rod-Type Photonic Crystal
摘要： Thermophotovoltaic systems in principle enable utilization of heat that is usually regarded as wasted energy. However, the wavelength selectivity of the thermal emitter required for high e?ciencies is di?cult to control with conventional designs. Here, we design a thermophotovoltaic system, comprising silicon rods as thermal emitter with a relatively narrow emission spectrum and photovoltaic cells with a band gap corresponding to 1.76 μm, and verify e?cient power generation. By accurately measuring the heat ?ux that enters the emitter, the emitter temperature, and the electrical output power of the photovoltaic cells, we ?nd that the actual system e?ciency (ratio of output power to ingoing heat ?ux) is 11.2% at an emitter temperature of 1338 K and the output power density footprint is 0.368 W/cm2. The obtained e?ciency is relatively high, i.e., 1.65 times that of the previously reported record value (6.8%). Further e?ciency improvements may lead to development of distributed energy supplies using combustion heat.
关键词： thermal emitter,photonics for energy materials,photonic crystals,thermophotovoltaics
更新于2025-09-12 10:27:22
-
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
-
nanocrystal-based film for solar cell
摘要： In recent years, energy harvesting through photovoltaic has emerged as promising and long-term technology for energy production. However, for commercial applications, the fabrication of a photovoltaic solar cell requires an easy and low-cost process compatible with large-area and high-throughput production. In this work, we demonstrate a simple and fast light sintering technique for Cu2ZnSnS4 (CZTS) nanocrystal-based film. The CZTS nanocrystal-based film was irradiated with various intensity of light to observe the sintering effect. The significant sintering of CZTS film was achieved by irradiating with light intensity of 2.23 J/cm2 for 200 microseconds. The solar cell fabricated with light sintered CZTS nanocrystal-based film exhibited efficiency of 1.9% with open circuit voltage of 0.50 V and short-circuit current density of 11.5 mA/cm2 with fill-factor of 0.33. The light sintering technique can be further optimized for large-area sintering of nanostructures for various applications.
关键词： Sintering,Thin films,Deposition,Solar energy materials,Crystal growth
更新于2025-09-12 10:27:22
-
Ag-decorated TiO2 nanofibers for highly efficient dye sensitized solar cell
摘要： For dye-sensitized solar cell, the modification of noble metals plays an important role in improving the light absorption of TiO2 films and reducing the recombination of electrons and holes. The composite photoanode of TiO2 nanoparticles/nanofibers (NP/NF) was prepared and soaked in AgNO3 solution at 0.01 mol/L, and the silver content was obtained according to different reduction times. The power conversion efficiency (PCE) increased from 5.39% to 6.36%. The PCE of composite photoanode increased by 18.0% compared with that of the photoanode without Ag modification.
关键词： TiO2 nanofibers,Ag-decorated TiO2 nanofibers,Solar energy materials,Dye sensitized solar cell,Nanocrystalline materials
更新于2025-09-11 14:15:04
-
Voltage-assisted SILAR deposition of CdSe quantum dots into mesoporous TiO2 film for quantum dot-sensitized solar cells
摘要： CdSe quantum dots (QDs) grows slowly in mesoporous TiO2 film deriving from a large lattice mismatch (11 %) and poor interaction between the two, which resulting the low power conversion efficiency (PCE) of quantum dot-sensitized solar cells (QDSSCs). An external voltage is applied in the successive ionic layer adsorption reaction (SILAR) process, which drives the Cd2+ and SeSO3 2- ions quickly diffused into the mesoporous TiO2 film and reacted to form CdSe QDs at room temperature. The CdSe QDSSCs yields a PCE of 3.27%. This work provides an efficient strategy to assemble QDs for enhancing the performance of QDSSCs.
关键词： Electrodeposition,Semiconductors,Energy storage and conversion,Solar energy materials,Nanoparticles
更新于2025-09-11 14:15:04
-
Fabrication of in-situ Ti-doped CuGaS2 thin films for intermediate band solar cell applications by sputtering with CuGaS2:Ti targets
摘要： Intermediate band solar cells (IBSCs) have great potential for improving device efficiencies, which can be fabricated by doping appropriate elements into a matrix semiconductor with a high band-gap (Eg). CuGaS2 (CGS) is an absorber with high absorption coefficient and high Eg, which is suitable to be a matrix. And some transition metals are suitable doping elements. Here, in-situ Ti-doped CGS thin films were deposited by sputtering CuGaS2:Ti targets to prepare IBSCs. The targets were fabricated by hot-pressed sintering of ball-milled Cu2S, Ga2S3, and TiS2 mixed powders. In-situ Ti-doped precursor films were prepared by sputtering with these targets. After sulfurization, grains grew up and CGS phases were gained. The Ti atoms were successfully doped into the CGS lattices. The Eg of about 2.42 eV was consistent with CGS. The current density-voltage curve of the solar cell exhibited exponential characteristics. This approach has enormous promise for the preparation of IBSCs.
关键词： In-situ doping,Intermediate band solar cells,CuGaS2:Ti targets,Sputtering,Solar energy materials
更新于2025-09-11 14:15:04
-
Preparation and characterization of hematite nanoparticles-decorated zinc oxide particles (ZnO/Fe2O3) as photoelectrodes for solar cell applications
摘要： Because of the socio-environmental and economic impacts of the use of fossil fuels, the demand for the diversi?cation of the energy matrix has increased. Energy devices utilizing renewable energy such as solar cells stand out as a possible solution to this problem. Therefore, in order to realize the practical applications of solar cells, it is imperative to develop novel structural materials and to optimize the properties of the existing ones. In this study, we prepared a photoelectrode using hematite-decorated zinc oxide particles (ZnO/Fe2O3). The ?eld-emission scanning electron microscopy and Brunauer–Emmett–Teller results con?rmed that Fe2O3 coated the surface of the ZnO particles and improved their photoelectrochemical properties. The composite was found to be a promising photoelectrode for solar cells.
关键词： Hematite nanoparticles,Photoelectrodes,Zinc oxide particles,Solar cell applications,Energy materials
更新于2025-09-11 14:15:04
-
Superficial composition engineering for oxide nanoparticles derived Cu2ZnSn(S, Se)4 solar cells by a three-step annealing process
摘要： In this work, a three-step (sulfurization-selenization-sulfurization) annealing process was designed to optimize the surface constitution of Cu2ZnSn(S, Se)4 (CZTSSe) thin films, which was prepared by oxide nanoparticles-based approach. The devices with the Mo/CZTSSe/CdS/ZnMgO/ZnO:Al/Al structure were fabricated and their performances were studied. The additional post-sulfurization with low toxicity sulfur powder has negligible impact on the structure, morphology and composition of CZTSSe bulk, however, it improves open circuit voltage of device significantly. The open circuit voltage can be increased significantly from 408 mV (without surface sulfurization) to 497 mV (with surface sulfurization). This is benefited from the increase of surficial sulfur content and the broadening of the surface band-gap of the CZTSSe thin film. The result is confirmed by X-ray photoelectron spectroscopy analysis. Such a crucial three-step annealing process promotes the power conversion efficiency from 4.71% (2-step) to 6.37% (3-step), which is the champion efficiency of oxide precursor derived CZTSSe solar cell.
关键词： Thin films,Cu2ZnSn(S, Se)4,Solar energy materials,Post-sulfurization
更新于2025-09-11 14:15:04
-
Formation of poly-crystalline BaSi2 thin films by pulsed laser deposition for solar cell applications
摘要： A new growth method for BaSi2 thin films by using pulsed laser deposition (PLD) on transparent SiO2 and CaF2 substrates has been developed. X-ray diffraction and Raman spectroscopy revealed the poly-crystalline property of the deposited films. By introducing a thin Si buffer layer on SiO2 substrate, the crystalline quality of BaSi2 thin films were improved. BaSi2 thin films exhibited a Ba/Si ratio very close to 0.5, indicating the good stoichiometry control of PLD growth. The absorption coefficient of the poly-BaSi2 reached 105 cm-1 and its band gap was deduced to be 1.32 eV, which are similar to those grown by molecular beam epitaxy or sputtering. A maximum photoresponsivity of 12.5 mA/W was achieved in the BaSi2 thin film, which implies the potential of PLD-deposited BaSi2 for thin film solar cell applications.
关键词： Thin films,BaSi2,Solar energy materials,Pulsed laser deposition
更新于2025-09-11 14:15:04