{"title":"CuO and Cu2O nanostructures: pathway to efficient dark current density","authors":"Leila Amiour, Youcef Aouabdia, Nadjah Sobti","doi":"10.1007/s00269-025-01310-2","DOIUrl":null,"url":null,"abstract":"<div><p>This study investigates the fabrication of CuO and Cu<sub>2</sub>O nanostructures by a simple solution-based method followed by thermal annealing. Pure CuO was obtained at 180 °C, while higher temperatures yielded Cu<sub>2</sub>O/CuO heterostructures. The pure CuO film exhibited the highest photocurrent density (140.05 mA/cm<sup>2</sup>) and a notable dark current density (60.27 mA/cm<sup>2</sup>). Although the heterostructures showed lower photocurrents, they also demonstrated significant dark currents (9.03–16.27 mA/cm<sup>2</sup>) across different annealing temperatures. These findings suggest a promising approach for developing effective CuO-based photoelectrodes with both excellent photocatalytic capabilities and a potential for dark current generation.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":20132,"journal":{"name":"Physics and Chemistry of Minerals","volume":"52 1","pages":""},"PeriodicalIF":1.2000,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics and Chemistry of Minerals","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1007/s00269-025-01310-2","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This study investigates the fabrication of CuO and Cu2O nanostructures by a simple solution-based method followed by thermal annealing. Pure CuO was obtained at 180 °C, while higher temperatures yielded Cu2O/CuO heterostructures. The pure CuO film exhibited the highest photocurrent density (140.05 mA/cm2) and a notable dark current density (60.27 mA/cm2). Although the heterostructures showed lower photocurrents, they also demonstrated significant dark currents (9.03–16.27 mA/cm2) across different annealing temperatures. These findings suggest a promising approach for developing effective CuO-based photoelectrodes with both excellent photocatalytic capabilities and a potential for dark current generation.
期刊介绍：
Physics and Chemistry of Minerals is an international journal devoted to publishing articles and short communications of physical or chemical studies on minerals or solids related to minerals. The aim of the journal is to support competent interdisciplinary work in mineralogy and physics or chemistry. Particular emphasis is placed on applications of modern techniques or new theories and models to interpret atomic structures and physical or chemical properties of minerals. Some subjects of interest are:
-Relationships between atomic structure and crystalline state (structures of various states, crystal energies, crystal growth, thermodynamic studies, phase transformations, solid solution, exsolution phenomena, etc.)
-General solid state spectroscopy (ultraviolet, visible, infrared, Raman, ESCA, luminescence, X-ray, electron paramagnetic resonance, nuclear magnetic resonance, gamma ray resonance, etc.)
-Experimental and theoretical analysis of chemical bonding in minerals (application of crystal field, molecular orbital, band theories, etc.)
-Physical properties (magnetic, mechanical, electric, optical, thermodynamic, etc.)
-Relations between thermal expansion, compressibility, elastic constants, and fundamental properties of atomic structure, particularly as applied to geophysical problems
-Electron microscopy in support of physical and chemical studies
-Computational methods in the study of the structure and properties of minerals
-Mineral surfaces (experimental methods, structure and properties)
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