Tailored up-conversion luminescence output of Al-modulated KYbF4: Er3+ nanocrystals for a low-temperature sensor. Issue 9 (14th February 2022)

• Record Type: Journal Article
• Authors: Cui, Zhenzhen; Zhao, Lei; Wang, Ting; Cao, Jiangyan; Qiao, Yufang; Pi, Chaojie; Fang, Zhaohui; Qiu, Jianbei; Xu, Xuhui; Yu, Xue
• Is Part Of: CrystEngComm. Volume 24:Issue 9(2022)
• Page Start: 1764
• Page End: 1772
• Publication Date: 2022-02-14
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d1ce01651b
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Tailored up-conversion luminescence output of Al-modulated KYbF4 : Er 3+ nanocrystals for a low-temperature sensor. Abstract : The up-conversion features of lanthanide-doped nanocrystals endow them with promising application potential in optical encoding, optical temperature sensing, bioimaging, diagnostics, and therapeutics. Here, tailoring the local structure to enhance the up-conversion luminescence intensity was achieved through chemical substitution with Al in KYbF4 : Er 3+ up-conversion nanoparticles (UCNPs). Moreover, the as-explored KYb0.98- x Al x F4 : 0.02 Er 3+ exhibits a superior temperature-dependent up-conversion performance. Herein, the relative sensitivity of the 2 H11/2 / 4 S3/2 thermally coupled levels (TCLs) and 4 F9/2 / 4 S3/2 non-thermally coupled levels (NTCLs), particularly below the room temperature, was evaluated. This indicates the potential application of the as-explored UCNPs with improved up-conversion performance as an optical temperature sensor for low temperature detection.