Multiple site occupancies of Eu3+ in differently oriented ZnMgO:Eu epilayers

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-02-26 DOI:10.1016/j.materresbull.2025.113403

Juby Alphonsa Mathew, Aleksandra Wierzbicka, Rafal Jakiela, Yaroslav Zhydachevskyy, Anastasiia Lysak, Marcin Stachowicz, Adrian Kozanecki

{"title":"Multiple site occupancies of Eu3+ in differently oriented ZnMgO:Eu epilayers","authors":"Juby Alphonsa Mathew, Aleksandra Wierzbicka, Rafal Jakiela, Yaroslav Zhydachevskyy, Anastasiia Lysak, Marcin Stachowicz, Adrian Kozanecki","doi":"10.1016/j.materresbull.2025.113403","DOIUrl":null,"url":null,"abstract":"<div><div>ZnMgO:Eu epilayers were grown on polar c-plane and non-polar r-plane Al2O3 substrates via oxygen plasma-assisted molecular beam epitaxy. The effect of crystal orientation on the luminescence properties is investigated in the as-grown and annealed ZnMgO:Eu crystals. The structural characteristics were accurately evaluated using the symmetrical and asymmetrical reciprocal space maps of high-resolution XRD measurements. Photoluminescence (PL), PL excitation properties and PL decay kinetics were studied at room- and low- temperatures. Regardless of the crystal orientation, annealed ZnMgO:Eu epilayers exhibit an intense Eu3+ red emission boosted by efficient host-to-dopant energy transfer and charge transfer mechanisms. However, ZnMgO:Eu/r-Al2O3 presents intrinsic defect luminescence centres, relatively quenching Eu3+ PL. Multiple emission lines are identified in the 5D0 to 7FJ=0 transition range. PL decay kinetics of Eu3+ showcases a long luminescence lifetime and multi-exponential behaviour under resonant and non-resonant excitations. Temperature-dependent luminescence analyses confirm multiple site occupancies of Eu3+ in ZnMgO.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"188 ","pages":"Article 113403"},"PeriodicalIF":5.3000,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Research Bulletin","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0025540825001114","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

ZnMgO:Eu epilayers were grown on polar c-plane and non-polar r-plane Al₂O₃ substrates via oxygen plasma-assisted molecular beam epitaxy. The effect of crystal orientation on the luminescence properties is investigated in the as-grown and annealed ZnMgO:Eu crystals. The structural characteristics were accurately evaluated using the symmetrical and asymmetrical reciprocal space maps of high-resolution XRD measurements. Photoluminescence (PL), PL excitation properties and PL decay kinetics were studied at room- and low- temperatures. Regardless of the crystal orientation, annealed ZnMgO:Eu epilayers exhibit an intense Eu³⁺ red emission boosted by efficient host-to-dopant energy transfer and charge transfer mechanisms. However, ZnMgO:Eu/r-Al₂O₃ presents intrinsic defect luminescence centres, relatively quenching Eu³⁺ PL. Multiple emission lines are identified in the ⁵D₀ to ⁷F_J=0 transition range. PL decay kinetics of Eu³⁺ showcases a long luminescence lifetime and multi-exponential behaviour under resonant and non-resonant excitations. Temperature-dependent luminescence analyses confirm multiple site occupancies of Eu³⁺ in ZnMgO.

Abstract Image

查看原文本刊更多论文

不同取向ZnMgO:Eu涂层中Eu3+的多位点占位

通过氧等离子体辅助分子束外延在极性c面和非极性r面Al2O3衬底上生长ZnMgO:Eu薄膜。研究了晶体取向对生长和退火ZnMgO:Eu晶体发光性能的影响。利用高分辨率XRD测量的对称和不对称互易空间图准确评价了结构特征。研究了室温和低温下的光致发光（PL）、PL激发特性和PL衰减动力学。无论晶体取向如何，退火后的ZnMgO:Eu薄膜都表现出强烈的Eu3+红发射，这是由有效的宿主到掺杂物的能量转移和电荷转移机制促进的。而ZnMgO:Eu/r-Al2O3则表现出本征缺陷发光中心，即相对猝灭的Eu3+ PL，在5D0 ~ 7FJ=0的过渡范围内存在多条发射线。Eu3+在共振和非共振激发下具有较长的发光寿命和多指数特性。温度依赖性发光分析证实了ZnMgO中Eu3+的多位点占用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.