Fluorescence and crystal structure of SrLa1−xAlO4:xEu3+ phosphor synthesized using a sol–gel method. (11th August 2021)

• Record Type: Journal Article
• Authors: Yan, Mei; Yue, Cheng; Pu, Yong; Zhu, Dachuan; Yan, Qun
• Is Part Of: Luminescence. Volume 36:Number 7(2021)
• Page Start: 1775
• Page End: 1780
• Publication Date: 2021-08-11
• Subjects: red emission -- sol–gel -- SrLa1−xAlO4:xEu3+ -- thermal stability -- wLEDs; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.4122
• Languages: English
• ISSNs: 1522-7235

Abstract

Abstract: The SrLa1− x AlO4 : x Eu 3+ phosphors were obtained using one calcination of a precursor synthesized using a sol–gel method. When excited at 396 nm, this phosphor emits a red light mixed with several strong peaks centred at 596 nm, 616 nm and 625 nm, attributed to 5 D0 → 7 F1, 2 transitions of Eu 3+ ions, respectively. The concentration quenching occurs at x = 1.5 mol% mol of SrLa1− x Eu x AlO4 and the critical energy transfer distance is calculated to be 13.13 Å, the dipole–dipole interaction was found to play a role. In addition, the colour purity could be up to 97.5%. Simultaneously, the thermal stability of SrLaAlO4 :Eu 3+ was measured and the thermal quenching was found at c . 275°C (T0.5 ), the excitation energy was 0.19 eV. Current results demonstrate that SrLaAlO4 :Eu 3+ could be a red component candidate for white light LEDs pumped by near‐UV chips. Abstract : A SrLa1− x AlO4 : x Eu 3+ phosphor was synthesized using a sol–gel method, the crystal structure and photoluminescence properties were investigated. The doped Eu ions substitute the sites of La 3+ and generate a strong red emission under near‐UV excitation.