Synthesis and Luminescence Characteristics of Cr3+ doped Y3Al5O12 Phosphors

Smith, Brenda A.¹  Dabestani, Reza T.¹  Lewis, Linda A.¹  Thompson, Cyril V.¹  Collins, Case T.¹  Aytug, Tolga¹ 

[1]Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

关键词: chromium;    dopant concentration;    Y3Al5O12;    luminescence;    cathodoluminescence;   

DOI  :  10.2172/1223077
RP-ID  :  ORNL/TM--2015/627
PID  :  OSTI ID: 1223077
Others  :  Other: 453040124

美国|英语

来源: SciTech Connect

【 摘 要 】

Luminescence performance of yttrium aluminum garnet (Y₃Al₅O₁₂) phosphors as a function of Cr³⁺ concentration has been investigated via two different wet-chemical synthesis techniques, direct- (DP) and hydrothermal-precipitation (HP). Using either of these methods, the red-emitting phosphor [Y₃Al_5-xCr_xO₁₂ (YAG: Cr³⁺)] showed similar photoluminescence (PL) intensities once the dopant concentration was optimized. Specifically, the YAG: Cr³⁺ PL emission intensity reached a maximum at Cr3+ concentrations of x = 0.02 (0.4 at.%) and x = 0.13 (2.6 at.%) for DP and HP processed samples, respectively. The results indicated the strong influence of the processing method on the optimized YAG: Cr³⁺ performance, where a more effective energy transfer rate between a pair of Cr3+ activators at low concentration levels was observed by using the DP synthesis technique. Development of a highly efficient phosphor, using a facile synthesis approach, could significantly benefit consumer and industrial applications by improving the operational efficiency of a wide range of practical devices.