Near/mid‐infrared emission and energy transfer of Er/Tm‐Yb co‐doped β‐NaYF4 microcrystals. Issue 3 (7th November 2016)

• Record Type: Journal Article
• Authors: Xiao, Quanlan
• Is Part Of: Journal of the American Ceramic Society. Volume 100:Issue 3(2017)
• Page Start: 1011
• Page End: 1021
• Publication Date: 2016-11-07
• Subjects: Er3+/Tm3+/Yb3+ -- microcrystal -- NaYF4 -- near/mid‐infrared; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.14635
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: The well‐formed high quality β‐NaYF4 :Er 3+ /Tm 3+, Yb 3+ microcrystals with near/mid‐infrared (NIR/MIR) emission are synthesized by the solvothermal method. Obvious 1.4 μm, 1.8 μm emissions, and 1.5 μm emission are observed in as‐prepared β‐NaYF4 :Tm 3+, Yb 3+ and β‐NaYF4 :Er 3+, Yb 3+ microcrystals, respectively. To obtain MIR emission, the as‐prepared β‐NaYF4 :Er 3+, Yb 3+ microcrystals are heat‐treated at different temperature schedule and atmosphere, it demonstrates there is great effect on the morphology and crystal structure when heat‐treated at different temperature, while little effect under different heat‐treated atmosphere. Subsequently, after heat‐treatment at 575°C in air, owing to the efficient elimination of internal defects and partly surface hydroxyl/citrate groups, an obvious 2.7 μm MIR emission is successfully detected in heat‐treated β‐NaYF4 :Er 3+, Yb 3+ microcrystals for the first time.