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Luminescence characteristics of bismuth and europium co-doped yttrium oxide red phosphor for white light emitting diodes  

Park, W.J. (Department of Advanced Materials Engineering, Sungkyunkwan University)
Jung, M.K. (Department of Advanced Materials Engineering, Sungkyunkwan University)
Yoon, S.G. (Department of Advanced Materials Engineering, Sungkyunkwan University)
Yoon, D.H. (Department of Advanced Materials Engineering, Sungkyunkwan University, Department of Advanced Materials Engineering & Sungkyunkwan Advanced Institute of Nanotechnology, Sungkyunkwan University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.16, no.3, 2006 , pp. 112-115 More about this Journal
Abstract
The red emission properties of $Bi^{3+}$ co-doped $Y_2O_3:Eu^{3+}$ prepared by the solid-state reaction was investigated, in order to verify its potential to act as the red emitting phosphor of white LEDs. The emission spectrum consisted of a weak band at 581, 587, 5931 and 599 nm, with maximum sharp peaks occurring at about 611 nm due to the $^5D_0{\rightarrow}^7F_2$ transition of $Eu^{3+}$, while the excitation spectrum exhibited a broad band between 290 and 430 mm with peaks occurring in the range of $310{\sim}390nm$. Also, SEM image of the sample containing 0.43 mol% $H_3BO_3$ and 2.08 mol% $BaCl_2{\cdot}2H_2O$ phosphor particles grew to achieve diameters of $700{\sim}800nm$.
Keywords
$Y_2O_3$; $Bi^{3+}$; $Eu^{3+}$; Red phosphor; White LEDs; Luminescence properties;
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