{"title":"锌取代Ni1-xZnxFe2O4-rGO杂化尖晶石的缺陷工程白光发射","authors":"T. Jose Antony, K. Jagannathan","doi":"10.1016/j.rsurfi.2025.100586","DOIUrl":null,"url":null,"abstract":"<div><div>The Zn-substituted Nickel Ferrite-rGO (NiFe<sub>2</sub>O<sub>4</sub>–rGO) nanocomposites were prepared to investigate its intrinsic defect-mediated optical emission tuning without external dopants. Formation of spinel structure with lattice distortions due to cation redistribution was confirmed by P-XRD. Uniform nanoscale distribution on rGO sheets was ascertained by HRSEM. The UV–Vis diffuse reflectance analysis revealed non-linear bandgap modification with Zn content, consistent with strain-induced electronic structure modification. The PL spectra revealed broad visible emissions dominated by intrinsic defects, with Zn substitution systematically modifying intensity and recombination dynamics. The CIE chromaticity plots revealed near-white emission, particularly for intermediate Zn content. This research illustrates that precise Zn<sup>2+</sup> substitution itself allows for structural and photoluminescent behavior control, with a defect-engineered pathway to white-light emission. Ni<sub>1-x</sub>Zn<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub>–rGO is a cost-effective, tunable optoelectronic material system.</div></div>","PeriodicalId":21085,"journal":{"name":"Results in Surfaces and Interfaces","volume":"20 ","pages":"Article 100586"},"PeriodicalIF":0.0000,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Defect-engineered white-light emission in Zn-substituted Ni1-xZnxFe2O4–rGO hybrid spinels\",\"authors\":\"T. Jose Antony, K. Jagannathan\",\"doi\":\"10.1016/j.rsurfi.2025.100586\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The Zn-substituted Nickel Ferrite-rGO (NiFe<sub>2</sub>O<sub>4</sub>–rGO) nanocomposites were prepared to investigate its intrinsic defect-mediated optical emission tuning without external dopants. Formation of spinel structure with lattice distortions due to cation redistribution was confirmed by P-XRD. Uniform nanoscale distribution on rGO sheets was ascertained by HRSEM. The UV–Vis diffuse reflectance analysis revealed non-linear bandgap modification with Zn content, consistent with strain-induced electronic structure modification. The PL spectra revealed broad visible emissions dominated by intrinsic defects, with Zn substitution systematically modifying intensity and recombination dynamics. The CIE chromaticity plots revealed near-white emission, particularly for intermediate Zn content. This research illustrates that precise Zn<sup>2+</sup> substitution itself allows for structural and photoluminescent behavior control, with a defect-engineered pathway to white-light emission. Ni<sub>1-x</sub>Zn<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub>–rGO is a cost-effective, tunable optoelectronic material system.</div></div>\",\"PeriodicalId\":21085,\"journal\":{\"name\":\"Results in Surfaces and Interfaces\",\"volume\":\"20 \",\"pages\":\"Article 100586\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-06-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Results in Surfaces and Interfaces\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2666845925001734\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Results in Surfaces and Interfaces","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666845925001734","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Defect-engineered white-light emission in Zn-substituted Ni1-xZnxFe2O4–rGO hybrid spinels
The Zn-substituted Nickel Ferrite-rGO (NiFe2O4–rGO) nanocomposites were prepared to investigate its intrinsic defect-mediated optical emission tuning without external dopants. Formation of spinel structure with lattice distortions due to cation redistribution was confirmed by P-XRD. Uniform nanoscale distribution on rGO sheets was ascertained by HRSEM. The UV–Vis diffuse reflectance analysis revealed non-linear bandgap modification with Zn content, consistent with strain-induced electronic structure modification. The PL spectra revealed broad visible emissions dominated by intrinsic defects, with Zn substitution systematically modifying intensity and recombination dynamics. The CIE chromaticity plots revealed near-white emission, particularly for intermediate Zn content. This research illustrates that precise Zn2+ substitution itself allows for structural and photoluminescent behavior control, with a defect-engineered pathway to white-light emission. Ni1-xZnxFe2O4–rGO is a cost-effective, tunable optoelectronic material system.
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