Room-temperature green to orange color-tunable upconversion luminescence from Yb3+/Mn2+ co-doped CaO. Issue 42 (18th October 2016)

• Record Type: Journal Article
• Authors: Wang, J. L.; Song, E. H.; Wu, M.; Dai, W. B.; Jiang, X. F.; Zhou, B.; Zhang, Q. Y.
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 42(2016)
• Page Start: 10154
• Page End: 10160
• Publication Date: 2016-10-18
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc02773c
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Room-temperature green to orange color-tunable upconversion is achieved from Yb 3+ /Mn 2+ co-doped CaO by adjusting the doping concentration of Mn 2+ ions upon 980 nm diode laser excitation. Abstract : Room-temperature green to orange color-tunable upconversion (UC) luminescence has been achieved from Yb 3+ /Mn 2+ co-doped CaO by adjusting the doping concentration of Mn 2+ ions and the temperature of the samples upon 980 nm laser diode excitation. In this material system, the green UC emission band centered at 508 nm and the wavelength-tunable orange UC emission band from 560 to 725 nm are realized at 980 nm excitation, which originate from the cooperative luminescence of Yb 3+ pairs and the | 2 F7/2, 4 T1 ( 4 G)〉 → | 2 F7/2, 6 A1 (S)〉 transition of exchange-coupled Yb 3+ –Mn 2+ dimers, respectively. The characteristic Stokes and UC emission properties, UC luminescence decay behaviors, temperature-dependent UC emission properties, as well as the involved UC mechanism of CaO:Yb 3+, Mn 2+ are investigated and discussed in detail. This study offers a new method to design novel UC materials for lighting and display applications instead of using conventionally investigated lanthanide (Ln 3+ ) ions, such as Er 3+, Tm 3+ and Ho 3+ .