{"title":"Harnessing the synergistic effect of CuO@Fe3O4/n-Si for high-efficiency photodiodes","authors":"","doi":"10.1016/j.jpcs.2024.112359","DOIUrl":null,"url":null,"abstract":"<div><div>High-performance photodetectors were fabricated using drop-casting method, employing pure CuO, Fe<sub>3</sub>O<sub>4</sub> and CuO@Fe<sub>3</sub>O<sub>4</sub> nanocomposite (NC). These devices aim to achieve enhanced responsivity (R), photosensitivity (P<sub>s</sub>), detectivity (D∗), and external quantum efficiency (EQE). The XRD results indicate that the crystallite size of the CuO@Fe<sub>3</sub>O<sub>4</sub> NC was reduced to around 20 nm, compared to 23 nm for pure CuO and 25 nm for pure Fe<sub>3</sub>O<sub>4</sub>. In addition, phase purity and functional groups were corroborated by Raman and FTIR analysis, supporting these findings. The bandgap energy of pure CuO and Fe<sub>3</sub>O<sub>4</sub> was estimated to be around 1.25 and 1.22 eV, respectively, while the CuO@Fe<sub>3</sub>O<sub>4</sub> NC exhibited a lower bandgap energy of 1.13 eV due to the interface between CuO and Fe<sub>3</sub>O<sub>4</sub>. Notably, the fabricated CuO@Fe₃O₄/n-Si photodiode exhibited excellent rectification properties under illumination, with an ideality factor (n) of 2.87 and a barrier height (Φ<sub>B</sub>) of 0.83 eV. The device achieved high P<sub>s</sub> of 773.4 %, R of 542.6 mA/W, EQE of 208.7 %, and D∗ of 2.91 × 10<sup>12</sup> Jones, demonstrating that the CuO@Fe<sub>3</sub>O<sub>4</sub> NC is the most effective material for photodetection in this study.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics and Chemistry of Solids","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022369724004943","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
High-performance photodetectors were fabricated using drop-casting method, employing pure CuO, Fe3O4 and CuO@Fe3O4 nanocomposite (NC). These devices aim to achieve enhanced responsivity (R), photosensitivity (Ps), detectivity (D∗), and external quantum efficiency (EQE). The XRD results indicate that the crystallite size of the CuO@Fe3O4 NC was reduced to around 20 nm, compared to 23 nm for pure CuO and 25 nm for pure Fe3O4. In addition, phase purity and functional groups were corroborated by Raman and FTIR analysis, supporting these findings. The bandgap energy of pure CuO and Fe3O4 was estimated to be around 1.25 and 1.22 eV, respectively, while the CuO@Fe3O4 NC exhibited a lower bandgap energy of 1.13 eV due to the interface between CuO and Fe3O4. Notably, the fabricated CuO@Fe₃O₄/n-Si photodiode exhibited excellent rectification properties under illumination, with an ideality factor (n) of 2.87 and a barrier height (ΦB) of 0.83 eV. The device achieved high Ps of 773.4 %, R of 542.6 mA/W, EQE of 208.7 %, and D∗ of 2.91 × 1012 Jones, demonstrating that the CuO@Fe3O4 NC is the most effective material for photodetection in this study.
期刊介绍:
The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems.
Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal:
Low-dimensional systems
Exotic states of quantum electron matter including topological phases
Energy conversion and storage
Interfaces, nanoparticles and catalysts.