Fabrication and Characterization of Copper System Compound Semiconductor Solar Cells (original) (raw)
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Structures and photovoltaic properties of copper oxides/fullerene solar cells
Journal of Physics and Chemistry of Solids, 2011
Copper oxide (CuO x ) thin films were produced by spin-coating and electrodeposition methods, and their microstructures and photovoltaic properties were investigated. Thin film solar cells based on the Cu 2 O/C 60 and CuO/C 60 heterojunction or bulk heterojunction structures were fabricated on F-doped or In-doped SnO 2 , which showed photovoltaic activity under air mass 1.5 simulated sunlight conditions. Microstructures of the CuO x thin films were examined by X-ray diffraction and transmission electron microscopy, which indicated the presence of Cu 2 O and CuO nanoparticles. The energy levels of the present solar cells were also discussed.
Fabrication and characterization of cuprous oxide: fullerene solar cells
Synthetic Metals, 2010
Cuprous oxide (Cu 2 O)-based solar cells with fullerene (C 60) were fabricated on indium tin oxide (ITO) by a spin-coating method. The microstructure and cell performance of the solar cells with the Cu 2 O:C 60 structure was investigated. A photovoltaic device based on an ITO/Cu 2 O:C 60 bulk heterojunction structure fabricated by the spin-coating method provided short-circuit current density of 0.11 mA cm −2 and opencircuit voltage of 0.17 V under an Air Mass 1.5 illumination. The microstructures of the Cu 2 O active layer were examined by using X-ray diffraction and transmission electron microscopy. The energy levels of the present solar cells are also discussed.
Review of the development of copper oxides with titanium dioxide thin-film solar cells
AIP Advances, 2020
Copper oxide-titanium dioxide (TiO 2) p-n junctions are promising materials for photovoltaic devices and may reduce production costs due to their low cost and inexpensive production methods compared with silicon solar cells. The present review compares solar cells made with copper oxides combined with TiO 2-TiO 2 /Cu 2 O and TiO 2 /CuO heterojunctions, and "cascade heterojunction systems." First, we describe the main properties of titanium (IV) dioxide (TiO 2), cuprous oxide (Cu 2 O), and cupric oxide (CuO), and their potential applications. Next, we explain the concept of copper oxide and TiO 2 heterojunctions. We summarize and present the photovoltaic characteristics (efficiency, fill factor, circuit current density, and open circuit voltage), thickness, preparation method, and electrode type for solar cells comprising copper oxide and TiO 2. The efficiency of the solar cells ranged from 0.0005% to 1.62%. The thickness of the TiO 2 and cupric oxide layers ranged from 0.06 to 16 μm, and from 0.18 to 1.5 μm, respectively, depending on the fabrication method. Additionally, we review and discuss the available combinations of copper oxide with other materials (Cu 2 O with ZnO, CuO with ZnO, and CuO with Si), as well as the effect of the thickness of the copper (I) oxide and copper (II) oxide on the solar cell performance. Finally, we present aspects to improve the conversion efficiency of heterojunction solar cells with copper oxides combined with TiO 2. This review will be useful for the construction and further development of thin-film solar cells.
CHARACTERIZATION OF Cu2O BASED HETEROJUNCTION SOLAR CELLS
Heterojunctions solar cells have been made by deposition of an n-type ZnO or ITO layer on a p-type Cu 2 O substrate produced by copper sheets oxidation. Under AM1.5G illumination, these cells show conversion efficiencies reaching 2% and open circuit voltages up to 600 mV which represent the best values reported for this semiconductor up to now. The cells have been characterized by dark and light J-V, admittance vs frequency and voltage measurements and subgap quantum yield energy dependence. The J-V and admittance data show some anomalous features: large ideality factors n, dark and light JV curves cross-over and excess capacitance. This suggest that, as in a MIS solar cell, the large values of n and therefore of V oc are due to the presence of a thin interfacial layer with a large density of interface defects. On the other hand the interpretation of the subgap quantum yield in term of the Internal Photoemission mechanism seems to indicate that the larger V oc values are due to increased heterojunction barrier heights. The two hypothesis are discussed.
A Review: Synthesis, Characterization and Cell Performance of Cu2O Based Material for Solar Cells
Low-cost thin film oxide/oxide heterojunctionsbased photovoltaic solar cellsare one of the alternatives to silicon solar cells, among the potential photovoltaic devices based on semiconductor oxides.Cuprous oxide is a potential material for the fabrication of low cost solar cells for terrestrial application. In this article, firstly, we reviewed cuprous oxide Crystal structure, Band structure, different properties of cuprous oxide material such as electrical and transport properties and photoluminescence.Then we discuss in detail the synthesis techniques for the production of copper oxide such as Thermal Oxidation, Anodic Oxidation, Electrodeposition, Sputtering, Chemical vapor deposition etc. Latter on a detailed survey on the previous work so far carried out on Cu2O based solar cells is presented.Thefabrication and cellperformance of based Solar Cells is also discussed.
Copper oxide based nanostructures for improved solar cell efficiency
Resurgence of copper oxide based thin film solar cells demands exclusive methods of integrating various layers with superior constituents for increased solar-electric conversion efficiency. Exceedingly optically active nanostructured phase mixture of copper oxides was synthesized by an energy efficient hydrothermal process. Comprehensive structural and optical studies of these nanostructured copper oxides reveal its efficacy as a unique solar cell material. Excellent solar cell characteristics have been observed when these nanopowders are integrated with ZnO/CuO based thin films. X-ray diffraction, Raman micro-scattering, scanning electron microscopy, energy dispersive X-ray spectroscopy, UV-vis spectroscopy, atomic force microscopy, and optoelectronic measurements were employed to characterize these unified electronic devices. Solar cell measurements indicate a considerable increase in short circuit current density (J sc ) and open circuit voltage (V oc ) in the fabricated nanostructure powder-thin film hybrid solar cell devices. The solar cell efficiency of these nanopowder-thin film devices is found to be 2.88%. The physics behind this enrichment of solar cell properties has also been elucidated in the study. Exhaustive Raman spectroscopic and photoluminescence studies prove that multi-phonon scattering may play a major role for this enhancement. This integration of nanostructures with thin film solar cells can evolve to a new direction in photovoltaic technology.
An Inorganic/Organic Hybrid Solar Cell Consisting ofCu< sub> 2 O and a Fullerene Derivative
Thin Solid Films, 2012
We fabricated inorganic/organic hybrid solar cells consisting of a p-type Cu2O layer and a fullerene derivative (PCBM) layer, which were prepared by wet processes. The Cu2O layer was grown by electrochemical deposition from an alkaline solution (pH 12.5) containing copper (II) sulfate and lactic acid. A PCBM layer was deposited on it by spin-casting a solution of PCBM. The optimized solar cell showed short circuit current density of 1.5 mA/cm2, open circuit voltage of 0.4 V, and overall power conversion efficiency of 0.095% under the condition of AM 1.5 G (100 mW/cm2). Improvement in mobility and lifetime of electrons in the Cu2O layer is considered to be the key to increase efficiency further.
Journal of Human, Earth, and Future, 2021
This study focused on the copper (I) oxide (Cu2O) that serves as an absorber layer, owing to its excellent optical properties, while titanium dioxide (TiO2) is a well-known material that has superior properties in solar cell development. In this work, the TiO2 nanorods layer was synthesised on a fluorine-doped tin oxide (FTO) glass substrate by a facile hydrothermal method followed by stacking the Cu2O layer using a low-cost electrodeposition method at different deposition times. Prior to deposition, a cyclic voltammetry (CV) measurement was performed, and the result showed that Cu2O films were successfully grown on the TiO2 nanorods layer with high uniformity. The crystallinity of the Cu2O/TiO2 film was increased when the deposition time was elevated. The strongest diffraction peak was detected in the sample deposited for 90 minutes. FE-SEM images revealed the formation of the pyramidal structure of Cu2O on the TiO2nanorod layer. The optical properties showed that the samples depos...
Characterization of CuO/n-Si heterojunction solar cells produced by thermal evaporation
Materials Science-Poland
Copper(II) oxide (CuO) in powder form was evaporated thermally on the front surface of an n-Si (1 0 0) single crystal using a vacuum coating unit. Structural investigation of the deposited CuO film was made using X-ray difraction (XRD) and energy dispersive X-ray analysis (EDX) techniques. It was determined from the obtained results that the copper oxide films exhibited single-phase CuO properties in a monoclinic crystal structure. Transmittance measurement of the CuO film was performed by a UV-Vis spectrophotometer. Band gap energy of the film was determined as 1.74 eV under indirect band gap assumption. Current-voltage (I-V) measurements of the CuO/n-Si heterojunctions were performed under illumination and in the dark to reveal the photovoltaic and electrical properties of the produced samples. From the I-V measurements, it was revealed that the CuO/n-Si heterojunctions produced by thermal evaporation exibit excellent rectifying properties in dark and photovoltaic properties under...