Novel persistent phosphors of lanthanide–chromium co-doped yttrium aluminum gallium garnet: design concept with vacuum referred binding energy diagram. Issue 20 (5th May 2016)

• Record Type: Journal Article
• Authors: Xu, Jian; Ueda, Jumpei; Tanabe, Setsuhisa
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 20(2016)
• Page Start: 4380
• Page End: 4386
• Publication Date: 2016-05-05
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc00802j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : We have developed Pr 3+ –Cr 3+ and Tb 3+ –Cr 3+ co-doped Y3 Al2 Ga3 O12 (YAG G ) persistent phosphors with orange (Pr 3+ ) and light green (Tb 3+ ) persistent luminescence. Abstract : We have developed Pr 3+ –Cr 3+ and Tb 3+ –Cr 3+ co-doped Y3 Al2 Ga3 O12 (YAG G ) persistent phosphors with orange (Pr 3+ ) and light green (Tb 3+ ) persistent luminescence. The duration of their persistent luminance (of 0.32 mcd m −2 ) can last up to about 8 h and 12 h, respectively. On the other hand, the persistent luminescence intensities of Nd 3+ –Cr 3+ and Dy 3+ –Cr 3+ co-doped YAG G samples are much weaker than those of the Pr 3+ –Cr 3+ and Tb 3+ –Cr 3+ co-doped ones, and the dominant persistent luminescence is mainly due to the deep-red transition of Cr 3+ . The mechanisms of different persistent luminescence behaviors of these four samples can be explained by the vacuum referred binding energy (VRBE) diagram of lanthanide ions in the YAG G host. The stability of hole traps at the ground states of Pr 3+, Nd 3+, Tb 3+ and Dy 3+ ions and the possibility to collaborate with Cr 3+ electron traps to induce persistent luminescence are discussed in detail.