{"title":"Remarkable role of B site regulation on a highly heat-resistant double-perovskite phosphor with versatile NIR utilizations","authors":"Hong Li, Yingfan Niu, Asif Ali Haider, Conglin Liu, Chenyi You, Hongzhi Zhang, Hongming Jiang, Junpeng Li, Yiting Huang, Shuangbao Wang, Dandan Gao, Shuping Huang, Jing Zhu","doi":"10.1016/j.cej.2025.161635","DOIUrl":null,"url":null,"abstract":"Double-perovskite-type near-infrared (NIR) phosphors have emerged as a desirable research hotspot, benefiting from the B/B’O<sub>6</sub> coordinations suitable for Cr<sup>3+</sup> luminescence. However, NIR efficiency and thermostability maintain challenging. Meanwhile, the precise identification of the Cr<sup>3+</sup> occupancy appears to be particularly important due to the abundant cation sites in double-perovskite structure. Herein, this research reported a Cr<sup>3+</sup>-activated A<sub>2</sub>BB’O<sub>6</sub> (Ca<sub>2</sub>AlTaO<sub>6</sub>) NIR phosphor with high luminescence heat-resistance (94 %@423 K). Under 444 nm excitation, Ca<sub>2</sub>AlTaO<sub>6</sub>:1.2 %Cr<sup>3+</sup> exhibits sharp emission originating from the <sup>2</sup><em>E</em><sub>g</sub>→<sup>4</sup><em>A</em><sub>2</sub> transition of Cr<sup>3+</sup>. The visualized proof provided by aberration-corrected transmission electron microscopy and spectral analysis confirm that Cr<sup>3+</sup> simultaneously occupies [BO<sub>6</sub>] and [B’O<sub>6</sub>] sites. Moreover, the B site regulation by Ga<sup>3+</sup> boosts luminescent efficiency 1.5 times. The Ca<sub>2</sub>Al<sub>0.8</sub>Ga<sub>0.2</sub>TaO<sub>6</sub>:1.2 %Cr<sup>3+</sup>-converted NIR LED device demonstrates stable photoelectric performance under high current over an extended period. Subsequently, the fascinating material is successfully demonstrated via the multifunctional applications in non-destructive detection, night vision, and plant growth lighting. This work provides valuable insights for constructing better double-perovskite-type NIR-emitting materials.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"207 1","pages":""},"PeriodicalIF":13.3000,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering Journal","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.cej.2025.161635","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Double-perovskite-type near-infrared (NIR) phosphors have emerged as a desirable research hotspot, benefiting from the B/B’O6 coordinations suitable for Cr3+ luminescence. However, NIR efficiency and thermostability maintain challenging. Meanwhile, the precise identification of the Cr3+ occupancy appears to be particularly important due to the abundant cation sites in double-perovskite structure. Herein, this research reported a Cr3+-activated A2BB’O6 (Ca2AlTaO6) NIR phosphor with high luminescence heat-resistance (94 %@423 K). Under 444 nm excitation, Ca2AlTaO6:1.2 %Cr3+ exhibits sharp emission originating from the 2Eg→4A2 transition of Cr3+. The visualized proof provided by aberration-corrected transmission electron microscopy and spectral analysis confirm that Cr3+ simultaneously occupies [BO6] and [B’O6] sites. Moreover, the B site regulation by Ga3+ boosts luminescent efficiency 1.5 times. The Ca2Al0.8Ga0.2TaO6:1.2 %Cr3+-converted NIR LED device demonstrates stable photoelectric performance under high current over an extended period. Subsequently, the fascinating material is successfully demonstrated via the multifunctional applications in non-destructive detection, night vision, and plant growth lighting. This work provides valuable insights for constructing better double-perovskite-type NIR-emitting materials.
期刊介绍:
The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.