Hina Dalal, Mukesh Kumar, Shalini Kaushik, Priyanka Sehrawat, Monika Sheoran, Poonam Devi, Neeraj Sehrawat, Surendra Kumar, R K Malik
{"title":"Highly efficient ultra-violet-stimulated green-emitting Tb3+ activated Sr6Y2Al4O15 nanocrystalline materials for advanced single-phase pc-WLED fabrication","authors":"Hina Dalal, Mukesh Kumar, Shalini Kaushik, Priyanka Sehrawat, Monika Sheoran, Poonam Devi, Neeraj Sehrawat, Surendra Kumar, R K Malik","doi":"10.1007/s12039-023-02203-z","DOIUrl":null,"url":null,"abstract":"<div><p>Strong green-emission is observed in the new Tb<sup>3+</sup> activated Sr<sub>6</sub>Y<sub>2</sub>Al<sub>4</sub>O<sub>15</sub> nanocrystalline material series fabricated <i>via</i> solution combustion methodology. A monoclinic crystal framework with space group I4/mcm (140) having irregularly shaped grains with an average size of 49 nm is formed. Morphological aspects are examined <i>via</i> scanning and transmission electron microscopy (SEM and TEM). On near-UV excitation, the photoluminescence spectrum presents a fair green-light production at 18382 cm<sup>-1</sup> wavenumbers reliable with the <sup>5</sup>D<sub>4</sub>→<sup>7</sup>F<sub>5</sub> electronic transition. The energy transfer phenomena are also discussed. The highest luminous intensity is observed for 5.0 mol% of Tb<sup>3+</sup> composition with 282 nm excitation wavelength. d-d exchanges authorized the presence of the concentration quenching phenomenon. Diffuse reflectance spectroscopy was taken into use to explore the energy band gap which lies in the semiconductor domain. The CIE coordinates lay in the greenish zone of the chromaticity scheme, thus confirming their latent contention in pc-WLED fabrication and other advanced photonic applications.</p><h3>Graphical abstract</h3><p>Strong green-emission is observed in the new Tb<sup>3+</sup> activated Sr<sub>6</sub>Y<sub>2</sub>Al<sub>4</sub>O<sub>15</sub> nanocrystalline material series fabricated <i>via</i> solution combustion methodology. A monoclinic crystal framework with space group I4/mcm (140) having irregularly shaped grains with an average size of 49 nm is formed. On near-UV excitation, the photoluminescence spectrum presents a fair green-light production at 18382 cm<sup>-1</sup> wavenumbers reliable with the <sup>5</sup>D<sub>4</sub>→<sup>7</sup>F<sub>5</sub> electronic transition. The CIE coordinates lay in the greenish zone of the chromaticity scheme, thus confirming their latent contention in pc-WLED fabrication and other advanced photonic applications.\n</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":616,"journal":{"name":"Journal of Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical Sciences","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s12039-023-02203-z","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 1
Abstract
Strong green-emission is observed in the new Tb3+ activated Sr6Y2Al4O15 nanocrystalline material series fabricated via solution combustion methodology. A monoclinic crystal framework with space group I4/mcm (140) having irregularly shaped grains with an average size of 49 nm is formed. Morphological aspects are examined via scanning and transmission electron microscopy (SEM and TEM). On near-UV excitation, the photoluminescence spectrum presents a fair green-light production at 18382 cm-1 wavenumbers reliable with the 5D4→7F5 electronic transition. The energy transfer phenomena are also discussed. The highest luminous intensity is observed for 5.0 mol% of Tb3+ composition with 282 nm excitation wavelength. d-d exchanges authorized the presence of the concentration quenching phenomenon. Diffuse reflectance spectroscopy was taken into use to explore the energy band gap which lies in the semiconductor domain. The CIE coordinates lay in the greenish zone of the chromaticity scheme, thus confirming their latent contention in pc-WLED fabrication and other advanced photonic applications.
Graphical abstract
Strong green-emission is observed in the new Tb3+ activated Sr6Y2Al4O15 nanocrystalline material series fabricated via solution combustion methodology. A monoclinic crystal framework with space group I4/mcm (140) having irregularly shaped grains with an average size of 49 nm is formed. On near-UV excitation, the photoluminescence spectrum presents a fair green-light production at 18382 cm-1 wavenumbers reliable with the 5D4→7F5 electronic transition. The CIE coordinates lay in the greenish zone of the chromaticity scheme, thus confirming their latent contention in pc-WLED fabrication and other advanced photonic applications.
期刊介绍:
Journal of Chemical Sciences is a monthly journal published by the Indian Academy of Sciences. It formed part of the original Proceedings of the Indian Academy of Sciences – Part A, started by the Nobel Laureate Prof C V Raman in 1934, that was split in 1978 into three separate journals. It was renamed as Journal of Chemical Sciences in 2004. The journal publishes original research articles and rapid communications, covering all areas of chemical sciences. A significant feature of the journal is its special issues, brought out from time to time, devoted to conference symposia/proceedings in frontier areas of the subject, held not only in India but also in other countries.