Tunable Upconversion Luminescence and Energy Transfer Process in BaLa2ZnO5:Er3+/Yb3+ Phosphors. (22nd March 2015)

• Record Type: Journal Article
• Authors: Mei, Lefu; Xie, Jing; Liao, Libing; Guan, Ming; Liu, Haikun
• Other Names: Li Zhaohui Academic Editor.
• Is Part Of: Advances in materials science and engineering. Volume 2015(2015)
• Publication Date: 2015-03-22
• Subjects: Materials science -- Periodicals; Materials science; Periodicals; 620.11
• DOI: 10.1155/2015/380936
• Languages: English
• ISSNs: 1687-8434

Abstract

Abstract : BaLa2 ZnO5 :Er 3+ /Yb 3+ has been synthesized via a high temperature solid-state method, and the tunable upconversion luminescence and energy transfer process between Yb 3+ and Er 3+ in this system have been demonstrated. Upon 980 nm laser excitation, the intense green and red emission around 527, 553, and 664 nm were observed for BaLa2 ZnO5 :Er 3+ /Yb 3+, which can be assigned to the characteristic energy level transitions of 2 H11/2 → 4 I15/2, 4 S3/2 → 4 I15/2, and 4 F9/2 → 4 I15/2 of Er 3+, respectively. The critical Er 3+ quenching concentration (QC) was determined to be about 5 mol%, and the power studies indicated that mixture of 2- and 3-photon process was responsible for the green and red upconversion luminescence.